# GPT-5.1: AI model fact sheet

- **Provider:** openai
- **Released:** 2025-11-13
- **Context window:** 400,000 tokens
- **API pricing:** $1.25 / 1M input, $10.00 / 1M output
- **OpenRouter ID:** openai/gpt-5.1
- **Capabilities:** conversation, reasoning, code-generation, analysis

GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning to allocate computation dynamically, responding quickly to simple queries while spending more depth on complex tasks.

## Benchmarks

| Benchmark | Score |
| --- | --- |
| SWE-bench Verified | 76.3% |

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/gpt-5.1