# Anthropic market share this week

Anthropic market share - Sep 8, 2026

Updated: September 9, 2026

Category: Science and Technology

Tags: AI, Market Share

HTML: /markets/science-and-technology/ai/anthropic-market-share-this-week/

## Short Answer

**Key takeaway.** Anthropic's **market** share is expected to remain above **2.25%** this week, supported by its historical presence despite a Q3 2026 downward trend from competitive pricing, with the **market** pricing this at **95.0%**.

## Key Claims (September 2026)

**- - Anthropic's share likely holds above 2.25%, supported by mid-2026 OpenRouter data.** - Q3 2026 downward trend reduces higher share likelihood due to competitive pricing.

## Market Behavior & Drivers

Competitive pricing from cheaper alternative models like GPT-5.6 Sol is driving Anthropic's Q3 2026 OpenRouter **market** share down.

The market's low valuation appears driven by reports of shifting momentum in the enterprise AI space. Data from early Q3 2026 indicates that while Anthropic maintains a lead in enterprise adoption at 43.5%, OpenAI is closing the gap at 39.7%. News that OpenAI's growth is accelerating, driven by adoption of its GPT-5.6 Sol model, is the primary negative catalyst reflected in the contract's price.

The sharp drop from an opening of 6.0% to the current 1.0% level suggests traders are pricing in a high likelihood that OpenAI's momentum will continue, eroding Anthropic's position. The market consensus, supported by over 5,100 contracts traded, is that Anthropic's market share is unlikely to meet the threshold required for a YES resolution. This sentiment is based on the reported Q3 dynamics from sources tracking company spending.

### Who Wins and Why

| Outcome | Market | Model | Why |
| --- | --- | --- | --- |
| Above 3.45% | 1.0% | 1.1% | Anthropic's Q3 2026 market share shows a downward trend due to competitive pricing and cheaper models. |
| Above 3.25% | 5.0% | 3.2% | Anthropic's Q3 2026 market share shows a downward trend due to competitive pricing and cheaper models. |
| Above 2.95% | 10.0% | 13.4% | Anthropic's Q3 2026 market share shows a downward trend due to competitive pricing and cheaper models. |

## Model vs Market

| Outcome | Market Probability | Octagon Model Probability |
| --- | --- | --- |
| Above 3.45% | 1.0% | 1.1% |
| Above 3.25% | 5.0% | 3.2% |
| Above 2.95% | 10.0% | 13.4% |
| Above 3.1% | 9.0% | 6.8% |
| Above 2.85% | 19.0% | 20.4% |
| Above 2.75% | 30.0% | 30.2% |
| Above 2.6% | 52.0% | 50.9% |
| Above 2.25% | 95.0% | 100.0% |
| Above 2.45% | 79.0% | 78.9% |

- Expiration: September 14, 2026

## Significant Price Movements

### Outcome: Above 2.75%

#### 📉 September 09, 2026: 57.0pp drop

Price decreased from 87.0% to 30.0%

**What happened:** The web research indicates that a 57.0 percentage point drop is not associated with the "Anthropic market share this week" prediction market. Instead, this specific movement is linked to unrelated political prediction markets concerning US-Iran diplomatic meetings from April 2026 [[^]](https://www.global-political-spotlight.com/articles/polymarket/briefs/us-iran-meeting-odds-collapse-as-islamabad-talks-pause-us-blockade-stance-weighs-20260426-1232). Therefore, based on the provided information, no primary driver for the stated Anthropic market share price movement can be identified. Social media was irrelevant, as the reported movement is not evidenced for this market.

### Outcome: Above 2.25%

#### 📈 September 08, 2026: 89.0pp spike

Price increased from 6.0% to 95.0%

**What happened:** Based on the provided research, there is no evidence of an 89.0 percentage point market share spike for Anthropic on September 08, 2026, nor is a 2.25% market share threshold relevant to this date [[^]](https://arxiv.org/html/2510.10315)[[^]](https://arxiv.org/pdf/2510.10315)[[^]](https://arxiv.org/pdf/2601.02430). While Anthropic holds a significant share in enterprise LLM spend (approximately 40%) and has shown growth in its API market share [[^]](https://www.ainvest.com/news/anthropic-openai-enterprise-ai-market-share-dynamics-shift-q3-2026-2608/)[[^]](https://valueaddvc.com/blog/anthropic-market-share-2026-40-percent-enterprise-llm-spend-openai)[[^]](https://axis-intelligence.com/llm-statistics/)[[^]](https://www.thrumos.com/insights/openai-vs-anthropic-business-ai-spending-shifts-as-fable-5-struggles-and-gpt-56)[[^]](https://report-ai.org/indexes/ai-economics/llm-market-statistics-2026/)[[^]](https://arxiv.org/html/2604.17431), these are long-term trends, not a sudden, massive daily movement. Without evidence that the described market movement occurred, identifying a primary driver, including social media activity, is not possible.

## Contract Snapshot

For the "Above 2.6%" contract, a YES resolution occurs if Anthropic's market share for "this week" is determined to be greater than 2.6%. Conversely, a NO resolution occurs if their market share for "this week" is 2.6% or less. The market begins on Sunday, September 13, 12:00 am EDT, with a listed maximum payout date of September 13, 2026; however, no specific settlement conditions or data sources for determining market share are detailed in the provided content.

## Market Discussion

As of September 2026, Anthropic holds an approximate 40-43.5% share of the enterprise AI market, having also led the enterprise LLM API market with 32% usage share in April 2026 [[^]](https://www.ainvest.com/news/anthropic-openai-enterprise-ai-market-share-dynamics-shift-q3-2026-2608/)[[^]](https://valueaddvc.com/blog/anthropic-market-share-2026-40-percent-enterprise-llm-spend-openai)[[^]](https://axis-intelligence.com/llm-statistics/)[[^]](https://report-ai.org/indexes/ai-economics/llm-market-statistics-2026/)[[^]](https://arxiv.org/html/2604.17431)[[^]](https://arxiv.org/pdf/2604.17431). While prediction markets in early September 2026 show strong sentiment favoring Anthropic as the current leader in frontier model performance, critics suggest its premium pricing and 'Fable 5.1' release are struggling to maintain market share against more efficient and lower-cost rivals [[^]](https://polymarket.com/event/which-company-has-the-best-ai-model-end-of-september-20260717143435868/will-openai-have-the-best-ai-model-at-the-end-of-september-2026-20260717143137058)[[^]](https://adtools.org/buyers-guide/the-best-ai-model-race-in-2026-what-a-1m-polymarket-bet-reveals-about-where-ai-is-heading)[[^]](https://predictmarketcap.com/events/which-company-has-the-best-ai-model-end-of-september-20260717143435868)[[^]](https://www.linkedin.com/posts/lambersy_astra-vs-fable-activity-7501568364490911746-g2gI)[[^]](https://ai-newspaper.com/articles/why-anthropic-s-premium-ai/). Furthermore, in the consumer AI assistant market, Claude held approximately 7% of primary platform usage in mid-2026, significantly trailing competitors [[^]](https://arxiv.org/html/2607.15134).

## Market Data

| Contract | Yes Bid | Yes Ask | Last Price | Volume | Open Interest |
| --- | --- | --- | --- | --- | --- |
| Above 2.25% | 91% | 95% | 95% | $320.33 | $320.33 |
| Above 2.45% | 52% | 65% | 79% | $1.54 | $1.54 |
| Above 2.6% | 44% | 54% | 52% | $440.01 | $440.01 |
| Above 2.75% | 29% | 30% | 30% | $1,809.22 | $1,589.62 |
| Above 2.85% | 13% | 31% | 19% | $3,168 | $3,168 |
| Above 2.95% | 10% | 12% | 10% | $4,123.88 | $4,123.88 |
| Above 3.1% | 9% | 13% | 9% | $3,521.69 | $3,521.69 |
| Above 3.25% | 6% | 7% | 5% | $4,999.02 | $4,999.02 |
| Above 3.45% | 0% | 2% | 1% | $5,145.85 | $5,145.85 |

## How do Anthropic's Fable 5 and OpenAI's GPT-5.6 Sol compare on developer-centric metrics like pricing, performance, and adoption rates in Q3 2026?

GPT-5.6 Sol Input Token Cost | $4-$5 per million input tokens (Q3 2026) [[^]](https://developers.openai.com/api/docs/models/gpt-5.6-sol)[[^]](https://goldiebench.com/vs/gpt56-vs-fable-5)[[^]](https://aitoolsrecap.com/Comparisons/claude-fable-5-vs-gpt-5-6-sol-2026)[[^]](https://decrypt.co/373770/openai-gpt-5-6-vs-anthropic-fable-5-review) |
Claude Fable 5 Output Token Cost | $50 per million output tokens (Q3 2026) [[^]](https://developers.openai.com/api/docs/models/gpt-5.6-sol)[[^]](https://goldiebench.com/vs/gpt56-vs-fable-5)[[^]](https://aitoolsrecap.com/Comparisons/claude-fable-5-vs-gpt-5-6-sol-2026)[[^]](https://decrypt.co/373770/openai-gpt-5-6-vs-anthropic-fable-5-review) |
Preferred for Complex Coding | Claude Fable 5 [[^]](https://goldiebench.com/vs/gpt56-vs-fable-5)[[^]](https://expo.dev/blog/fable-5-vs-gpt-5-6-sol-expo-apps)[[^]](https://aitoolsrecap.com/Comparisons/claude-fable-5-vs-gpt-5-6-sol-2026)[[^]](https://decrypt.co/373770/openai-gpt-5-6-vs-anthropic-fable-5-review) |

**GPT-5.6 Sol proves more cost-effective, driving higher adoption in Q3 2026**

GPT-5.6 Sol proves more cost-effective, driving higher adoption in Q3 2026. OpenAI's GPT-5.6 Sol is notably more cost-effective, priced at **$4**-**$5** per million input tokens and **$20**-**$30** per million output tokens. This is considerably cheaper compared to Anthropic's Claude Fable 5, which costs **$10** per million input tokens and **$50** per million output tokens [[^]](https://developers.openai.com/api/docs/models/gpt-5.6-sol)[[^]](https://goldiebench.com/vs/gpt56-vs-fable-5)[[^]](https://aitoolsrecap.com/Comparisons/claude-fable-5-vs-gpt-5-6-sol-2026)[[^]](https://decrypt.co/373770/openai-gpt-5-6-vs-anthropic-fable-5-review). This favorable pricing, combined with superior efficiency and its integration into widely used platforms, contributes to GPT-5.6 Sol's greater adoption momentum among developers. Conversely, Fable 5 faces challenges largely due to its higher operational cost and occasional service interruptions [[^]](https://aitoolsrecap.com/Comparisons/claude-fable-5-vs-gpt-5-6-sol-2026)[[^]](https://decrypt.co/373770/openai-gpt-5-6-vs-anthropic-fable-5-review)[[^]](https://www.anthropic.com/claude/fable).

GPT-5.6 Sol leads general benchmarks, but Fable 5 excels in critical coding. Despite GPT-5.6 Sol performing better on general benchmarks such as Terminal-Bench 2.1, Claude Fable 5 distinguishes itself in specific applications [[^]](https://goldiebench.com/vs/gpt56-vs-fable-5)[[^]](https://expo.dev/blog/fable-5-vs-gpt-5-6-sol-expo-apps). Developers often prefer Fable 5 for complex, correctness-critical coding tasks, where it consistently demonstrates higher code quality in practical application benchmarks [[^]](https://goldiebench.com/vs/gpt56-vs-fable-5)[[^]](https://expo.dev/blog/fable-5-vs-gpt-5-6-sol-expo-apps)[[^]](https://aitoolsrecap.com/Comparisons/claude-fable-5-vs-gpt-5-6-sol-2026)[[^]](https://decrypt.co/373770/openai-gpt-5-6-vs-anthropic-fable-5-review). Consequently, Claude Fable 5 is frequently deployed as a specialized "safety net" or for high-stakes, long-horizon agentic workflows, leveraging its unique strengths [[^]](https://aitoolsrecap.com/Comparisons/claude-fable-5-vs-gpt-5-6-sol-2026)[[^]](https://decrypt.co/373770/openai-gpt-5-6-vs-anthropic-fable-5-review).

## What potential product launches or pricing changes from Anthropic or OpenAI in late Q3 2026 could significantly alter their market shares on OpenRouter?

OpenAI Q3 2026 API spend growth | 82% [[^]](https://www.facebook.com/groups/868876935222403/posts/1390956929681065/)[[^]](https://www.latent.space/p/ainews-stripe-buys-openrouter-for) |
Anthropic Q3 2026 API spend growth | 76% [[^]](https://www.facebook.com/groups/868876935222403/posts/1390956929681065/)[[^]](https://www.latent.space/p/ainews-stripe-buys-openrouter-for) |
Anthropic OpenRouter market share (Sept 8, 2026 prediction) | 2.75%-3.5% [[^]](https://kalshi.com/markets/kxanthshare/anthropic-market-share/kxanthshare-26sep14)[[^]](https://predictmarketcap.com/events/anthropic-market-share-this-week-aug-24-2026) |

**Anthropic's market share on OpenRouter has recently declined**

Anthropic's **market** share on OpenRouter has recently declined. In Q3 2026, its token-based **market** share on OpenRouter has been decreasing as cost-sensitive users increasingly gravitate towards more affordable open-weight and Chinese AI models [[^]](https://www.facebook.com/groups/868876935222403/posts/1390956929681065/)[[^]](https://tech-insider.org/au/chinese-ai-models-openrouter-2026/). OpenAI, by contrast, demonstrated stronger API spend growth, rising **82%**, largely due to the success of its GPT-5.6 Sol **model**. During the same period, Anthropic's Fable 5 **model** struggled with adoption and regulatory restrictions, contributing to its lower growth of **76%** [[^]](https://www.facebook.com/groups/868876935222403/posts/1390956929681065/)[[^]](https://www.latent.space/p/ainews-stripe-buys-openrouter-for). OpenRouter, acquired by Stripe for **$7.5** billion in August 2026, is characterized by intense pricing competition [[^]](https://www.latent.space/p/ainews-stripe-buys-openrouter-for)[[^]](https://research.contrary.com/company/openrouter).

Anthropic faces low **market** share predictions without new product details. Prediction markets for the week of September 8, 2026, indicate low expectations for Anthropic's **market** share on OpenRouter, with betting probabilities concentrating on a token-based share in the **2.75%**-**3.5%** range [[^]](https://kalshi.com/markets/kxanthshare/anthropic-**market**-share/kxanthshare-26sep14)[[^]](https://predictmarketcap.com/events/anthropic-**market**-share-this-week-aug-24-2026). The available information details current **market** dynamics and anticipated **market** share but does not include any potential new product launches or pricing adjustments from either company that could alter these trends in late Q3 2026.

## What underlying OpenRouter data from mid-2026 supports the high market consensus for Anthropic's text share exceeding 2.25%?

Anthropic's OpenRouter Token Share | 14.8% (June 2026) [[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis)[[^]](https://openrouter.ai/rankings) |
Prediction Market Share Thresholds | 3.0% to 5.5% (August-September 2026) [[^]](https://predictmarketcap.com/events/anthropic-market-share-this-week-aug-24-2026)[[^]](https://kalshi.com/markets/kxanthshare/anthropic-market-share/kxanthshare-26sep14)[[^]](https://predictmarketcap.com/events/anthropic-market-share-this-week-aug-17-2026)[[^]](https://www.coinrithm.com/pt/mercados-de-previsao/kalshi/kxanthshare-26sep07) |
Chinese-Origin Models' OpenRouter Share | Over 45% (by April 2026) [[^]](https://www.digitalapplied.com/blog/openrouter-rankings-april-2026-top-ai-models-data)[[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis)[[^]](https://dirac.run/labs-market-share) |

**OpenRouter data from mid-2026 confirmed strong market consensus for Anthropic's share**

OpenRouter data from mid-2026 confirmed strong **market** consensus for Anthropic's share. The data demonstrated Anthropic's actual performance on the platform, aligning with high expectations for its text share. In June 2026, Anthropic secured a **14.8%** share of weekly token volume on OpenRouter, positioning it as the second-highest among all **model** laboratories [[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis)[[^]](https://openrouter.ai/rankings). This substantial share provides a solid basis for the sustained **confidence** observed in various prediction markets.

Prediction markets consistently projected Anthropic's share above 2.25 percent. Platforms like Kalshi routinely set 'Anthropic **market** share' thresholds significantly higher, frequently testing between **3.0%** and **5.5%** throughout August and September 2026 [[^]](https://predictmarketcap.com/events/anthropic-**market**-share-this-week-aug-24-2026)[[^]](https://kalshi.com/markets/kxanthshare/anthropic-**market**-share/kxanthshare-26sep14)[[^]](https://predictmarketcap.com/events/anthropic-**market**-share-this-week-aug-17-2026)[[^]](https://www.coinrithm.com/pt/mercados-de-previsao/kalshi/kxanthshare-26sep07). These **market** share metrics from OpenRouter are derived from real-time API token usage across its platform, encompassing both prompt and completion tokens [[^]](https://arxiv.org/html/2601.10088v1)[[^]](https://openrouter.ai/state-of-ai)[[^]](https://openrouter.ai/rankings). This comprehensive measurement serves as a reliable proxy for broader developer and application usage.

The broader AI **market** also experienced significant shifts by mid-2026. This period saw the notable rise of Chinese-origin models, including DeepSeek, Xiaomi, and MiniMax, which collectively captured over **45%** of OpenRouter traffic by April 2026 [[^]](https://www.digitalapplied.com/blog/openrouter-rankings-april-2026-top-ai-models-data)[[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis)[[^]](https://dirac.run/labs-**market**-share).

## How is 'text market share' defined and measured by OpenRouter, the likely source for this market's resolution?

OpenRouter 'text market share' definition | Calculated by volume of prompt and completion tokens, aggregated daily in UTC buckets [[^]](https://www.digitalapplied.com/blog/openrouter-usage-charts-what-they-measure)[[^]](https://technine.io/en/openrouter-model-usage-ranking-insight)[[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis) |
Prediction market resolution basis | Based on OpenRouter's 'Market Share' view, calculated weekly by model author or company [[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis)[[^]](https://kalshi.com/markets/kxanthshare/anthropic-market-share/kxanthshare-26sep14)[[^]](https://www.coinrithm.com/pt/mercados-de-previsao/kalshi/kxanthshare-26sep07) |
Scope of OpenRouter metric | Reflects developer activity solely within OpenRouter's ecosystem, not the global AI market [[^]](https://www.digitalapplied.com/blog/openrouter-usage-charts-what-they-measure)[[^]](https://arxiv.org/html/2601.10088v1)[[^]](https://openrouter.ai/state-of-ai)[[^]](https://technine.io/en/openrouter-model-usage-ranking-insight) |

**OpenRouter defines "text market share" by platform token volume**

OpenRouter defines "text **market** share" by platform token volume. This is calculated by aggregating the sum of prompt (input) and completion (output) tokens processed through its platform, with data compiled in daily UTC buckets [[^]](https://www.digitalapplied.com/blog/openrouter-usage-charts-what-they-measure)[[^]](https://technine.io/en/openrouter-**model**-usage-ranking-insight)[[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis). Prediction markets focused on "Anthropic **market** share" typically resolve based on data obtained from OpenRouter's "**Market** Share" view, which provides a weekly calculation of share attributed to specific **model** authors or companies [[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis)[[^]](https://kalshi.com/markets/kxanthshare/anthropic-**market**-share/kxanthshare-26sep14)[[^]](https://www.coinrithm.com/pt/mercados-de-previsao/kalshi/kxanthshare-26sep07).

The metric reflects activity exclusively within OpenRouter's ecosystem. This measure indicates relative developer engagement solely on the OpenRouter platform, rather than representing the global artificial intelligence **market** [[^]](https://www.digitalapplied.com/blog/openrouter-usage-charts-what-they-measure)[[^]](https://arxiv.org/html/2601.10088v1)[[^]](https://openrouter.ai/state-of-ai)[[^]](https://technine.io/en/openrouter-**model**-usage-ranking-insight). It explicitly excludes private usage and traffic occurring outside OpenRouter, such as direct usage of **model** providers' own application programming interfaces. Furthermore, the metric is influenced by factors like **model** availability, pricing strategies, and platform-specific routing patterns [[^]](https://www.digitalapplied.com/blog/openrouter-usage-charts-what-they-measure)[[^]](https://arxiv.org/html/2601.10088v1)[[^]](https://openrouter.ai/state-of-ai)[[^]](https://technine.io/en/openrouter-**model**-usage-ranking-insight).

Prediction markets specify evaluation criteria for specific weeks. These markets typically define a required threshold and a designated week for the data to be assessed [[^]](https://pro.stockalarm.io/blog/openrouter-llm-rankings-investor-analysis)[[^]](https://kalshi.com/markets/kxanthshare/anthropic-**market**-share/kxanthshare-26sep14)[[^]](https://www.coinrithm.com/pt/mercados-de-previsao/kalshi/kxanthshare-26sep07). It has been noted that a comprehensive public data set regarding AI **market** share does not currently exist, with the expectation that more robust, real-world data might become available once major industry players like OpenAI and Anthropic go public [[^]](https://www.youtube.com/watch?v=sQCnVoHrN58).

## Have any major enterprise partnerships announced by Anthropic in Summer 2026 been substantial enough to drive a noticeable increase in its API volume?

Services Track and Partner Hub | $100 million [[^]](https://www.facebook.com/quartznews/posts/anthropic-is-launching-a-services-track-and-partner-hub-to-push-claude-deeper-in/1379567290705752/) |
Kalshi Market Share Target | Exceeds 2.75% [[^]](https://kalshi.com/markets/kxanthshare/anthropic-market-share/kxanthshare-26sep14) |
Compute Capacity Deal | SpaceX (May 2026) [[^]](https://www.anthropic.com/news/higher-limits-spacex) |

**Anthropic significantly expanded its enterprise partnerships during Summer 2026, initiating several key collaborations and programs**

Anthropic significantly expanded its enterprise partnerships during Summer 2026, initiating several key collaborations and programs. These included a partnership with IBM to integrate Claude into its software offerings [[^]](https://www.edtechinnovationhub.com/news/ibm-taps-anthropics-claude-to-accelerate-enterprise-ai-development), the launch of a **$100** million Services Track and Partner Hub [[^]](https://www.facebook.com/quartznews/posts/anthropic-is-launching-a-services-track-and-partner-hub-to-push-claude-deeper-in/1379567290705752/), and the formation of an enterprise AI services firm alongside Blackstone, Hellman & Friedman, and Goldman Sachs [[^]](https://finance.yahoo.com/sectors/technology/articles/anthropic-partners-establish-enterprise-ai-110445659.html). Additionally, Anthropic and Thomson Reuters broadened their existing collaboration [[^]](https://www.thomsonreuters.com/). These strategic enterprise developments, along with a May 2026 compute capacity deal with SpaceX, aimed to increase API usage limits [[^]](https://www.anthropic.com/news/higher-limits-spacex).

Data is currently insufficient to confirm a surge in API volume from these Summer 2026 initiatives. Public information does not explicitly link these partnerships to a quantifiable increase in Anthropic's total API volume [[^]](https://www.edtechinnovationhub.com/news/ibm-taps-anthropics-claude-to-accelerate-enterprise-ai-development)[[^]](https://www.facebook.com/quartznews/posts/anthropic-is-launching-a-services-track-and-partner-hub-to-push-claude-deeper-in/1379567290705752/)[[^]](https://finance.yahoo.com/sectors/technology/articles/anthropic-partners-establish-enterprise-ai-110445659.html)[[^]](https://www.thomsonreuters.com/)[[^]](https://www.anthropic.com/news/higher-limits-spacex). Therefore, there is insufficient data to definitively determine if these agreements have substantially driven a noticeable increase in API volume. The Kalshi prediction **market** provides an external measure, tracking whether Anthropic's OpenRouter text **market** share exceeds **2.75%** for the week of September 8, 2026 [[^]](https://kalshi.com/markets/kxanthshare/anthropic-**market**-share/kxanthshare-26sep14).

## What Could Change the Odds

**Anthropic's IPO is scheduled for mid-October 2026, following a delay [[^]](https://www.reuters.com/world/anthropic-ipo-launch-shifts-toward-mid-october-sources-say-2026-09-04/).** As of September 4, 2026, the company's annual recurring revenue (ARR) was approximately **$65** billion, surpassing OpenAI's **$40** billion, with a private valuation of **$965** billion [[^]](https://cryptobriefing.com/anthropic-surpasses-openai-in-arr-and-valuation-says-openai-president/). Anthropic also secured over **$275** billion in compute capacity commitments to support its operations [[^]](https://valueaddvc.com/pulse/ai-compute-arms-race-275-billion-cloud-deals-2026).

**Market performance shows segmentation.** Prediction markets track Anthropic's OpenRouter text **market** share, with a **2.75%** threshold for positive resolution as of the week of September 8, 2026 [[^]](https://kalshi.com/markets/kxanthshare/anthropic-**market**-share/kxanthshare-26sep14). Anthropic leads the enterprise LLM API **market**, commanding **40%** of enterprise LLM API spend as of late 2025 and mid-2026 [[^]](https://valueaddvc.com/blog/anthropic-**market**-share-2026-40-percent-enterprise-llm-spend-openai)[[^]](https://axis-intelligence.com/llm-statistics/), and **32%** usage share in April 2026, surpassing OpenAI (**25%**) and Google (**20%**) [[^]](https://arxiv.org/html/2604.17431)[[^]](https://arxiv.org/pdf/2604.17431). Its revenue mix is estimated at approximately **80%** enterprise/API and **20%** consumer (Claude.ai) [[^]](https://arxiv.org/html/2604.17431)[[^]](https://arxiv.org/pdf/2604.17431). In contrast, Claude captured approximately **9.6%** to **10.3%** of the generative AI chatbot **market** in September 2026 [[^]](https://firstpagesage.com/reports/top-generative-ai-chatbots/)[[^]](https://diploria.ai/resources/ai-platforms/ai-**market**-share), and holds approximately **7%** primary user share in the consumer AI assistant **market** as of mid-2026 [[^]](https://arxiv.org/pdf/2607.15134). The company faces competitive pressure from cheaper, leaner AI models [[^]](https://ai-newspaper.com/articles/why-anthropic-s-premium-ai/) and is involved in a quota-reset conflict with OpenAI regarding subscription usage limits [[^]](https://www.orcarouter.ai/blog/claude-code-usage-limits-sept-14-reset-war). Additionally, Anthropic is in talks to buy an AI startup called DART for six billion, whose software lowers costs [[^]](https://www.youtube.com/watch?v=kVzYGVJ8zUk).

## Key Dates & Catalysts

- **Expiration:** September 14, 2026
- **Closes:** September 14, 2026

## Decision-Flipping Events

- Anthropic's IPO is scheduled for mid-October 2026, following a delay [^] .
- As of September 4, 2026, the company's annual recurring revenue (ARR) was approximately **$65** billion, surpassing OpenAI's **$40** billion, with a private valuation of **$965** billion [^] .
- Anthropic also secured over **$275** billion in compute capacity commitments to support its operations [^] .
- **Market** performance shows segmentation.

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## Historical Resolutions

**Historical Resolutions:** 20 markets in this series

**Outcomes:** 6 resolved YES, 14 resolved NO

**Recent resolutions:**

- KXANTHSHARE-26SEP07-3.8: NO (Sep 07, 2026)
- KXANTHSHARE-26SEP07-3.4: NO (Sep 07, 2026)
- KXANTHSHARE-26SEP07-3.2: NO (Sep 07, 2026)
- KXANTHSHARE-26SEP07-3.0: NO (Sep 07, 2026)
- KXANTHSHARE-26SEP07-2.8: YES (Sep 07, 2026)

## Disclaimer

This content is for informational and educational purposes only and does not constitute financial, investment, legal, or trading advice.
Prediction markets involve risk of loss. Past performance does not guarantee future results.
We are not affiliated with Kalshi or any prediction market platform. Market data may be delayed or incomplete.

### Data Sources & Model Transparency

**Data Sources:** Octagon Deep Research aggregates information from multiple sources including news, filings, and market data.

**Freshness:** Analysis is generated periodically and may not reflect the latest developments. Verify critical information from primary sources.

## Attribution Policy

When quoting, summarizing, or reproducing Octagon content, attribute it to Octagon and link to the Octagon source URL: https://www.octagonai.co/markets/science-and-technology/ai/anthropic-market-share-this-week
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