Major Release OpenAI · Released
GPT-5.1
What is GPT-5.1?
GPT-5.1 is a Major Release AI model from OpenAI, released on November 12, 2025. It has a 400K tokens context window, costs $2.25 per million input tokens, and scores 1439 on Chatbot Arena Elo. It is available via the company's API.
Maintenance update to GPT-5 with steerability + latency improvements.
Major GPT-5 iteration with adaptive reasoning and perfect scores on math competitions
Key features
- Adaptive reasoning modes
- Perfect 100% on AIME 2025
- 87.5% on ARC-AGI
- Enhanced multimodal capabilities
How much does GPT-5.1 cost?
| Metric | Price |
|---|---|
| input per mtok | $2.25 |
| output per mtok | $11.00 |
| cache read per mtok | $0.12 |
Pricing data verified .
What context window does GPT-5.1 have?
- Context window
- 400K tokens
- Max output
- 64K
- Input modalities
- text, image, audio
- Output modalities
- text, audio
How does GPT-5.1 score on benchmarks?
| Benchmark | Score |
|---|---|
| MMLU-Pro | 87.0% |
| GPQA Diamond | 87.3% |
| SWE-bench Verified | 70.1% |
| LiveCodeBench | 86.8% |
| HLE | 26.5% |
| SciCode | 43.3% |
| TAU2-bench | 81.9% |
| TerminalBench-Hard | 45.5% |
| IF-Bench | 72.9% |
| LiveCodeBench Reasoning | 75.0% |
| AA Intelligence Index | 47.7 |
| Chatbot Arena Elo | 1439 |
Benchmark scores verified .
How does GPT-5.1 compare to GPT-5?
- LiveCodeBench Reasoning: 25.0% → 75.0% (+50.0pt)
- Input pricing: $2.50 → $2.25
- Context window: 400K tokens → 400K tokens
Compare GPT-5.1 with
Launch coverage
- Openai Walks A Tricky Tightrope With Gpt-5.1’S Eight New Personalities Ars Technica
- Openai Says The Brand-New Gpt-5.1 Is ‘Warmer’ And Has More ‘Personality’ Options The Verge
- Openai Introduces Gpt-5.1: Combining Adaptive Reasoning, Account Level Personalization, And Updated Safety Metrics In The... MarkTechPost
- Openai Debuts Gpt-5.1-Codex-Max, A Long-Horizon Agentic Coding Model With Compaction For Multi-Window Workflows MarkTechPost
- Gpt-5.1 Instant And Gpt-5.1 Thinking System Card Addendum OpenAI