Model Tracker
GPT-5.1
GPT-5.1 is an AI model made by OpenAI. OpenAI released it on 13 November 2025. It is deprecated. It takes text, image and returns text.
GPT-5.1 is an AI model made by OpenAI. OpenAI released it on 13 November 2025. It is deprecated. It takes text, image and returns text. Its context window is 400,000 tokens. Its longest answer is 128,000 tokens. Through the API it costs $1.25 per 1M tokens for input and $10.00 per 1M tokens for output. Its knowledge cutoff is 30 September 2024.
- Released
- 13 November 2025 — openai.com, read 19 October 2026
- Status
- Deprecated — developers.openai.com, read 19 October 2026
- Takes
- Text, Image — developers.openai.com, read 19 October 2026
- Returns
- Text — developers.openai.com, read 19 October 2026
- Open weights
- Not confirmed: The maker's pages reviewed do not state whether GPT-5.1 has open weights.
- Licence
- Not confirmed: The maker's pages reviewed do not print a licence for GPT-5.1.
- Context window
- 400,000 tokens — developers.openai.com, read 19 October 2026
- Longest answer
- 128,000 tokens — developers.openai.com, read 19 October 2026
- Knowledge cutoff
- 30 September 2024 — developers.openai.com, read 19 October 2026
- API price, input
- $1.25 per 1M tokens — developers.openai.com, read 19 October 2026
- API price, output
- $10.00 per 1M tokens — developers.openai.com, read 19 October 2026
- Where
- API — openai.com, read 19 October 2026
- Parameters
- Not confirmed: The maker's pages reviewed do not publish a parameter count for GPT-5.1.
- Model card
- Not confirmed: The maker's pages reviewed do not identify a model card or system card for this API model.
Benchmarks
Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.
Arena
- Text Arena, gpt-5.1-high: 1,456 (1,452–1,459, 41,651 votes), published 15 October 2026
- Text Arena, gpt-5.1: 1,439 (1,435–1,442, 44,434 votes), published 15 October 2026
- Code Arena (WebDev), GPT-5.1 (Medium): 1,396 (1,384–1,407, 4,912 votes), published 18 October 2026
- Code Arena (WebDev), GPT-5.1: 1,342 (1,333–1,350, 10,713 votes), published 18 October 2026
- Vision Arena, gpt-5.1-high: 1,251 (1,244–1,259, 9,861 votes), published 9 October 2026
- Vision Arena, gpt-5.1: 1,240 (1,232–1,247, 10,818 votes), published 9 October 2026
Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0
Epoch AI
- Epoch Capabilities Index, GPT-5.1: 149.8 (148.5–151.5), as of 19 October 2026
- GPQA Diamond, gpt-5.1-2025-11-13_high: 87.6% (± 1.9), run 13 November 2025
- GPQA Diamond, gpt-5.1-2025-11-13_medium: 85.0% (± 2.1), run 17 November 2025
- GPQA Diamond, gpt-5.1-2025-11-13_none: 66.7% (± 3.4), run 7 August 2026
- SWE-bench Verified, gpt-5.1-2025-11-13_high: 68.0% (± 2.1), run 18 February 2026
- OTIS Mock AIME 2024–2025, gpt-5.1-2025-11-13_high: 88.6% (± 4.0), run 13 November 2025
- OTIS Mock AIME 2024–2025, gpt-5.1-2025-11-13_medium: 85.6% (± 4.4), run 17 November 2025
- OTIS Mock AIME 2024–2025, gpt-5.1-2025-11-13_low: 63.9% (± 5.9), run 25 November 2025
- OTIS Mock AIME 2024–2025, gpt-5.1-2025-11-13_none: 37.8% (± 7.3), run 7 August 2026
- SimpleQA Verified, gpt-5.1-2025-11-13_high: 48.0% (± 1.6), run 27 August 2026
Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0
Questions
When was GPT-5.1 released?
OpenAI released GPT-5.1 on 13 November 2025.
Is GPT-5.1 still available?
It is deprecated: OpenAI has announced the date it will retire it.
What is the context window of GPT-5.1?
The context window of GPT-5.1 is 400,000 tokens, as OpenAI prints it.
How much does the GPT-5.1 API cost?
On the standard tier, GPT-5.1 costs $1.25 per 1M tokens for input and $10.00 per 1M tokens for output, as OpenAI lists it.
What does GPT-5.1 take and return?
GPT-5.1 takes text, image and returns text.
What is the knowledge cutoff of GPT-5.1?
The knowledge cutoff of GPT-5.1 is 30 September 2024.
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Sources
- GPT-5.1 Model | OpenAI API (read 19 October 2026)
- Introducing GPT-5.1 for developers (read 19 October 2026)
- Deprecations | OpenAI API (read 19 October 2026)