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GPT-5.1

Iterative improvement on GPT-5 with enhanced reasoning and tool support.

openai/gpt-5.1

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Streaming

Vision

Tools

Reasoning

JSON Output

Structured JSON

Web Search

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OpenAI Pricing for GPT-5.1

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Context: 400k

Input

$1.375

/M tokens

Cache Read

$0.1375

/M tokens

Output

$11

/M tokens

+ $0.010 per search