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GPT-5.1-Codex-Max

openai/gpt-5.1-codex-max

context
400K
modalities
text, image → text
capabilities
Tool use, Reasoning, Vision, Structured output, Long context

Overview

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...

Providers

Access method depends on provider and account setup.

Pricing

  • Azure

    input / 1M
    $1.25
    output / 1M
    $10.00

Use this model through Nautili

Route requests to GPT-5.1-Codex-Max through your Nautili gateway using a supported SDK or the Nautili SDK.

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Route across supported providers through one control layer.