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 89.2% on MMLU-Pro. 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 |
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 | 89.2% |
| GPQA Diamond | 77.8% |
| SWE-bench Verified | 70.1% |
Benchmark scores verified .
How does GPT-5.1 compare to GPT-5?
- GPQA Diamond: 74.2% → 77.8% (+3.6pt)
- 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