GPT-5.1 Chat
openai/gpt-5.1-chat-20251113
OpenAI's GPT-5.1 Chat, released on 2025-01-01, processes text, image, and file inputs to produce text output with a context length of 128 000 tokens. Pricing is $1.25 per million input tokens and $10 per million output tokens; the model supports tool usage, does not provide built‑in reasoning, and its weights are not open.
- tool use
- structured outputs
At a glance
Specifications
What the API gives you
- Context window
- 128K tokens
- Max output
- 16K tokens
- Input price
- $1.25 / 1M tokens
- Output price
- $10 / 1M tokens
- Cache read
- $0.13 / 1M tokens
- Modalities
- file, image, text → text
- Knowledge cutoff
- —
- Released
- Jan 1, 2025
Recommendation coverage
Where this model appears
Not currently included in a published recommendation. This means the available task-specific evidence did not support a ranking yet—not that the model was reviewed and rejected.
Benchmarks
No independent benchmark results are linked to this model yet. We keep it visible while withholding quality claims until usable results arrive.
Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.