AI Observatory / Model Radar OpenAI / openai/gpt-5.1

OpenAI: GPT-5.1

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...

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400,000 Context
128,000 Max output
$1.25 / 1M Prompt price
2025-11-13 Created
01 / Snapshot

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Provider OpenAI Input modalities image, text, file
Output modalities text Prompt price $1.25 / 1M
Completion price $10.00 / 1M Request price N/A
Context length 400,000 Max completion tokens 128,000
Supported parameters include_reasoning, max_completion_tokens, max_tokens, reasoning, response_format, seed, structured_outputs, tool_choice, tools
Best for openai/gpt-5.1

OpenAI: GPT-5.1

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...

Deep analysis Cross-modal work Long context High-volume usage vision tool-capable long-context low-cost
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Google: Gemini 2.5 Flash Lite

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