DeepSeek market share this week
Short Answer
DeepSeek's market share is likely to exceed 21.7% this week, supported by its token usage reaching 34.9% on OpenRouter as of September 11, 2026, following the V4.1-Flash model launch; the market prices this outcome at 99.0%.
1. Market Behavior & Drivers
The market probability for DeepSeek's market share spiked 77 percentage points on September 14, 2026. This move from 22.0% to 99.0% was driven by the release and reporting of the DeepSeek-V4.1-Flash model. DeepSeek officially announced the model on September 10, 2026, featuring aggressive pricing at $0.003 per million cached tokens and architectural efficiencies, which traders priced as a significant catalyst for market share gains.
Subsequent trading at the new 99.0% level on September 15 saw volume of 131.86 contracts, indicating conviction in the move. The high probability reflects sentiment across multiple prediction markets, which collectively assign an 84-99% confidence that DeepSeek will achieve over 20% market share for the specified week. This confidence is based on the company's existing OpenRouter presence, a result of its API strategy and global developer adoption.
- DeepSeek's market share above 21.7% appears likely, given 34.9% as of September 11.
- V4.1-Flash model launch and aggressive pricing support sustained high market share.
Who Wins and Why
| Outcome | Market | Model | Why |
|---|---|---|---|
| Above 21.7% | 99.0% | 99.5% | DeepSeek's market share on OpenRouter reached 34.9%, supported by the V4.1-Flash model launch. |
| Above 22.7% | 98.0% | 99.1% | DeepSeek's market share on OpenRouter reached 34.9%, supported by the V4.1-Flash model launch. |
| Above 27.6% | 4.0% | 7.4% | DeepSeek's market share on OpenRouter reached 34.9%, supported by the V4.1-Flash model launch. |
| Above 23.6% | 95.0% | 97.7% | DeepSeek's market share on OpenRouter reached 34.9%, supported by the V4.1-Flash model launch. |
| Above 24.3% | 79.0% | 94.7% | DeepSeek's market share on OpenRouter reached 34.9%, supported by the V4.1-Flash model launch. |
Current Context
DeepSeek currently maintains a significant presence on OpenRouter driven by an API strategy. As of mid-September 2026, prediction markets assign an 84-99% confidence level to DeepSeek achieving over 20% market share for the week of September 8-14, 2026 [^][^][^][^]. DeepSeek's global developer popularity stems from its aggressive, low-cost API pricing and the release of efficient open-weight models, recently bolstered by the V4.1 Flash launch [^][^][^]. In contrast, DeepSeek's share in broader consumer chatbot market reports, such as those from Statcounter and FirstPageSage, ranges from 0.02% to 0.4%, considerably lower than major US-based platforms like ChatGPT or Gemini [^][^]. This reflects DeepSeek's focus on developer-API usage over consumer-facing web traffic [^][^]. By early 2026, DeepSeek had captured 13% of the overall LLM market share, marking one of the fastest growth trajectories in IT history [^].
DeepSeek's innovation and growth impact broader LLM market structure. The company is preparing for a potential Shanghai STAR Market IPO, with reports suggesting a valuation of approximately $74 billion following a $7.4 billion funding round [^][^][^][^]. The most recent major development is the DeepSeek-V4 series, released mid-2026, which introduces advancements like the Muon optimizer and hybrid attention architectures to efficiently support 1-million-token contexts [^][^][^]. DeepSeek's entry into the market has contributed to a shift in the broader LLM landscape, moving from a "highly concentrated" state (HHI > 2,500) in 2023 to a "moderately concentrated" state (HHI ~2,086) by early 2026 [^]. This de-concentration is largely attributable to the emergence of competitive open-source models, including DeepSeek [^].
2. Price Chart
Historical Price (Probability)
Outcome probability
Date
3. Significant Price Movements
Notable price changes detected in the chart, along with research into what caused each movement.
Outcome: Above 23.6%
📈 September 15, 2026: 67.0pp spike
Price increased from 26.0% to 93.0%
What happened: The reported 67.0 percentage point spike in DeepSeek's market share for the week of September 15, 2026, appears to be a misattribution. The "67.0 pp" figure likely originates from a May 2026 academic study on LLM agent vulnerability metrics, not an actual market share increase [^]. As of September 2026, DeepSeek's general AI chatbot market share is around 0.4% [^]. Therefore, there is no evidence of a real market movement to explain, making the premise unfounded, and no primary driver can be identified.
Outcome: Above 22.7%
📈 September 14, 2026: 87.0pp spike
Price increased from 7.0% to 94.0%
What happened: The primary driver of the 87.0 percentage point spike was the release and subsequent reporting of the DeepSeek-V4.1-Flash model. DeepSeek officially announced the V4.1-Flash model on September 10, 2026, featuring aggressive pricing ($0.003/million cached tokens) and architectural efficiencies designed to boost adoption and market share [^][^]. This significant product launch, with its competitive attributes, was further highlighted in news coverage by Forbes on September 14, 2026, coinciding directly with the prediction market's movement [^][^]. While this type of news likely generated discussion, the provided sources do not detail specific social media activity or posts from key figures.
4. Market Data
Contract Snapshot
This market resolves "Yes" if DeepSeek's market share for the current week is above the percentage specified in the contract (e.g., 25.3%); otherwise, it resolves "No". The market begins on Sunday, September 20, at 12:00 am EDT, and refers to "DeepSeek market share this week". No special settlement conditions beyond the stated market share threshold are explicitly detailed.
Available Contracts
Market options and current pricing
| Outcome bucket | Yes (price) | No (price) | Last trade probability |
|---|---|---|---|
| Above 21.7% | $1.00 | $0.01 | 99% |
| Above 22.7% | $0.99 | $0.02 | 98% |
| Above 23.6% | $0.99 | $0.03 | 95% |
| Above 24% | $0.94 | $0.12 | 90% |
| Above 25.3% | $0.80 | $0.27 | 89% |
| Above 24.3% | $0.87 | $0.22 | 79% |
| Above 24.7% | $0.81 | $0.27 | 72% |
| Above 26.3% | $0.27 | $0.85 | 14% |
| Above 27.6% | $0.05 | $0.96 | 4% |
Market Discussion
DeepSeek exhibits strong market penetration in developer-focused metrics and open-weight models, having led OpenRouter token routing with an 18% share by June 2026 and capturing 47% of tracked downloads in the 250B+ parameter model segment as of early 2026 [^][^][^][^][^]. This growth is largely attributed to its models being reported to undercut Western rivals by 40x-100x on price, despite concerns over reliability and platform outages [^][^][^]. Prediction markets indicate an 84% probability of DeepSeek's OpenRouter market share exceeding 20.8% for the week of September 8, 2026 [^].
5. Trust Index
“Above 25.3%” made a sharp jump with almost no trading behind it.
Integrity risk· Thin-volume moves
How it adds up
Integrity80% of score76Good
Market integrity is low (62), but Integrity averages all three scores, so the other two pull it up. Only a critically low score would cap the total.
Trade quality20% of score80Good
Trust score77Good
Weighted blend with hard caps — a critically weak safety pillar, or a severe trading anomaly, caps the total regardless of the rest. Full methodology · About the Trust Index
Trust profile
Integrity4 screens run · 6 don't apply
6. What upcoming model releases or pricing changes from competitors like OpenAI, Google, or Anthropic could challenge DeepSeek's OpenRouter dominance in Q3-Q4 2026?
| DeepSeek OpenRouter Market Share | 17.6% (June 2026) [^] |
|---|---|
| DeepSeek Predicted Market Share | >20.8% with 99% probability (September 2026) [^][^] |
| Competitor Price Reduction Rate | 10x per year [^][^][^] |
DeepSeek currently dominates OpenRouter, holding a significant market share. As of mid-2026, DeepSeek maintained a leading position on OpenRouter, with its weekly token market share reaching 17.6% in June 2026. This placed it significantly ahead of rivals, as Anthropic held 14.8% and Google 12.5% during the same period [^]. Furthermore, prediction markets, as of September 15, 2026, indicated a 99% probability that DeepSeek's OpenRouter text market share would exceed 20.8% for the week of September 8, 2026 [^][^].
DeepSeek faces intensifying competition from US-based model providers. Its strong market position is being challenged by US-based competitors such as OpenAI, Google, and Anthropic. These companies are rapidly reducing prices, noted at a rate of 10x per year, and concurrently releasing new, highly efficient frontier models like GPT-5.6 Sol, Gemini 3.1 Flash-Lite, and GPT-5.4 nano [^][^][^][^]. This competitive pressure, driven by developer adoption of these new models, is broadly anticipated to intensify during Q3-Q4 2026 [^][^][^][^].
7. What evidence from developer usage data on OpenRouter through Q3 2026 supports a sustained market share above 20% for DeepSeek?
| DeepSeek Market Share (Sept 11, 2026) | 34.9% [^][^] |
|---|---|
| DeepSeek Market Share (Q2 2026) | 5.6% [^][^] |
| DeepSeek Probability (>21.7% Sept 2026) | >99% [^][^][^][^] |
DeepSeek has shown substantial market share growth on OpenRouter. Its token usage market share escalated to 34.9% as of September 11, 2026, marking a significant increase [^][^]. This represents a substantial rise from approximately 5.6% in Q2 2026, growing to 17.6% by June 2026, confirming its market share was well above 20% within Q3 2026 [^][^].
DeepSeek's sustained market presence is reinforced by prediction markets. Kalshi prediction markets indicated implied probabilities exceeding 99% for DeepSeek to maintain a market share above 21.7% through September 2026 [^][^][^][^]. This growth contributes to a broader trend where Chinese-origin models captured over 60% of total token traffic on OpenRouter by mid-2026, primarily driven by competitive cost-to-capability ratios [^][^].
8. How do DeepSeek-V4's performance benchmarks and cost-per-million-tokens compare against key OpenRouter rivals like Claude 3.5 Sonnet and Llama 3.1 as of September 2026?
| Latest Model | DeepSeek-V4.1-Flash (as of September 2026) [^][^] |
|---|---|
| Announcement Date | September 10, 2026 [^][^] |
| DeepSeek-V4 Pro Input Cost | $0.435 per million tokens [^][^] |
DeepSeek-V4.1-Flash, announced September 10, 2026, is the newest model. This model, part of the DeepSeek-V4 family, began handling V4-Pro requests on September 14, 2026 [^][^]. DeepSeek-V4.1-Flash is specifically engineered to surpass the performance of previous flagship models in the series, including its predecessor, V4-Pro [^][^]. However, the provided research does not detail specific direct performance benchmarks for DeepSeek-V4.1-Flash when compared against Claude 3.5 Sonnet or Llama 3.1 [^][^].
DeepSeek-V4 models are generally positioned as being more cost-efficient. The DeepSeek-V4 series models aim for greater cost-efficiency per token when measured against various flagship closed-source alternatives [^][^]. For instance, the DeepSeek-V4 Pro model was priced at $0.435 per million tokens for input and $0.87 per million tokens for output [^][^]. Despite this general positioning, specific direct pricing comparisons against Claude 3.5 Sonnet and Llama 3.1 for September 2026 are not provided in the research [^][^].
9. What is the specific methodology OpenRouter uses to calculate weekly market share, and what are the potential sources of error or volatility in this metric?
| Market Share Basis | Total tokens (sum of prompt and completion) per model author or variant [^][^][^] |
|---|---|
| Aggregation Window | Rolling seven-day window, normalized to UTC daily buckets [^][^][^] |
| DeepSeek Resolution | Market resolves for week of September 14, 2026, based on public rankings [^][^] |
OpenRouter calculates weekly market share by aggregating processed tokens. OpenRouter determines weekly market share by combining the total number of processed tokens, encompassing both prompt and completion tokens, attributable to each model author or model variant [^][^][^]. This aggregation occurs over a rolling seven-day period and is normalized using UTC daily buckets [^][^][^]. However, there is no publicly documented, standardized methodology for OpenRouter's market share calculation. Expert public market analysis typically focuses on financial market metrics rather than AI model usage or routing share [^][^].
Several factors introduce potential errors and volatility into these metrics. Potential sources of error or volatility in this specific metric include the exclusion of Bring Your Own Key (BYOK) requests, regional usage skews resulting from heavy API-integrated workflow bias, self-selection bias among developers, and the exclusion of private requests from public rankings [^]. For example, a prediction market concerning DeepSeek's market share for the week of September 14, 2026, is scheduled to resolve based on these public model author rankings [^][^].
General market metrics face volatility from various external influences. Market share metrics, particularly in financial or tech platforms, are generally subject to volatility arising from practices such as reward-farming or incentive wars, which can inflate headline volume without reflecting genuine activity [^][^][^]. Low liquidity, leading to wide bid/ask spreads, and discrepancies between headline volume and more accurate indicators like open interest or market depth, also contribute to this volatility [^][^][^]. DeepSeek is identified as a China-based AI firm, with its market impact related to AI investor sentiment and tech sector repricing, rather than being a crypto-native asset [^][^].
10. How might DeepSeek's planned IPO on the Shanghai STAR Market impact its aggressive API pricing and developer incentive strategy through the end of 2026?
| IPO Target Market | Shanghai STAR Market [^][^][^] |
|---|---|
| IPO Target Timeline | Before end of 2026 [^][^][^] |
| OpenRouter Market Share Probability | Approx. 84% for >20.8% by Sept 14, 2026 [^][^][^] |
DeepSeek is preparing for an Initial Public Offering (IPO) on the Shanghai STAR Market, engaging CITIC Securities to manage the process. The company aims to complete this IPO before the end of 2026, primarily to secure capital for substantial investments in compute infrastructure, in-house chip development, and talent retention. This strategic move is intended to enhance DeepSeek's competitive standing against more heavily funded rivals in the industry [^][^][^].
Coinciding with its IPO preparations, DeepSeek has revised its API pricing model, implementing a significant net price increase for users. As of mid-August 2026, the company transitioned from its previous 'aggressive low-cost' flat pricing structure to a new system that incorporates distinct peak and off-peak API rates [^][^][^].
While the available research does not detail how DeepSeek's planned IPO might affect its developer incentive strategy, prediction markets offer insight into its market position [^] [^] [^] [^] [^] [^] . Prior to the September 14, 2026, resolution date, these markets indicated an approximately 84% probability of DeepSeek achieving an OpenRouter market share exceeding 20.8% [^][^][^].
11. What Could Change the Odds
Key Catalysts
DeepSeek's aggressive cost-cutting strategies represent a primary catalyst. The September 2026 launch of the V4.1-Flash model, with cached input pricing at $0.003 per million tokens, significantly pressured competitors and influenced memory-sector stock prices [^][^]. While DeepSeek recently implemented time-of-day peak-hour pricing, its cost advantage remains a significant bullish catalyst for corporate and developer adoption, contrasting with the high-premium pricing of US frontier models [^]. This cost efficiency has driven strong growth in the developer-centric market; DeepSeek's share of tokens routed through OpenRouter reached approximately 18% by June 2026 [^][^]. Prediction markets on Kalshi regarding DeepSeek's OpenRouter token market share for the week of September 8, 2026, priced an 'Above 20.8%' outcome at approximately 84% probability as of September 9, 2026 [^].
DeepSeek continues to iterate on its technology, having released the DeepSeek-V4 series in mid-2026, which focuses on million-token context intelligence and architectural efficiencies such as hybrid attention and the Muon optimizer [^] . This technological development supports its lead in the large model segment (250B+ parameters), capturing 47% of total tracked downloads in this category as of early 2026 [^][^]. While DeepSeek was historically the largest single open-source contributor by volume, its relative market dominance waned by 2026 as other model families, such as Qwen, increasingly captured meaningful market share [^]. The open-source Large Language Model (LLM) ecosystem is characterized by highly diversified usage, with no single model family consistently holding more than approximately 20
25% of open-source token volume as of mid-2026 [^][^]. DeepSeek holds approximately 0.4% market share among generative AI chatbots by monthly active users as of early September 2026 [^].
Key Dates & Catalysts
- Expiration: September 21, 2026
- Closes: September 21, 2026
12. Decision-Flipping Events
- Trigger: DeepSeek's aggressive cost-cutting strategies represent a primary catalyst.
- Trigger: The September 2026 launch of the V4.1-Flash model, with cached input pricing at $0.003 per million tokens, significantly pressured competitors and influenced memory-sector stock prices [^] [^] .
- Trigger: While DeepSeek recently implemented time-of-day peak-hour pricing, its cost advantage remains a significant bullish catalyst for corporate and developer adoption, contrasting with the high-premium pricing of US frontier models [^] .
- Trigger: This cost efficiency has driven strong growth in the developer-centric market; DeepSeek's share of tokens routed through OpenRouter reached approximately 18% by June 2026 [^] [^] .
14. Related News
15. Historical Resolutions
Historical Resolutions: 20 markets in this series
Outcomes: 5 resolved YES, 15 resolved NO
Recent resolutions:
- KXDEEPSHARE-26SEP14-25.8: NO (Sep 14, 2026)
- KXDEEPSHARE-26SEP14-24.7: NO (Sep 14, 2026)
- KXDEEPSHARE-26SEP14-24: NO (Sep 14, 2026)
- KXDEEPSHARE-26SEP14-23.6: NO (Sep 14, 2026)
- KXDEEPSHARE-26SEP14-23.3: NO (Sep 14, 2026)
