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OpenAI: GPT-5.1-Codex-Max

openai/gpt-5.1-codex-max

GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...

Harga input / 1M token
$1.25
Harga output / 1M token
$10.00
Context length
400.000

Modalitas

Input
text, image
Output
text

Parameter yang didukung

include_reasoningmax_completion_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools

Rilis

4 Desember 2025

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