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OpenAI

GPT-5.1 Codex Max

openai/gpt-5.1-codex-max

codingagenticreasoninglong-runningcodex

Input price

942.0 RODI/M

~ 1.25 USD/M

Output price

7535.4 RODI/M

~ 10 USD/M

Context

400K

Max output

128K

Input:textimage
Output:text

Providers & pricing

ProviderInputOutputFree tier
Azure

Azure

Default

942.0 RODI/M~1.25 USD/M7535.4 RODI/M—
OpenAI

OpenAI

942.0 RODI/M~1.25 USD/M7535.4 RODI/M—

Pricing

RateRODIUSD (ref.)Unit
In942.0~ 1.25USD/M · RODI/M
Out7535.4~ 10.00USD/M · RODI/M
Cached94.2~ 0.125USD/M · RODI/M

RODI prices include RodiumAi markup and upstream fees. USD figures are wholesale reference rates.

Capabilities

Streaming
Tool calling
Vision
JSON mode
Reasoning

About this model

GPT-5.1 Codex variant optimized for long-running agentic coding tasks via the Responses API.

API usage

Use the canonical slug with client.chat() or chat.completions.create().

RodiumAi SDK

Official Python, JavaScript, and Laravel SDKs — flat API aligned with this model slug.

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Compatible SDKs (OpenAI / Anthropic packages)

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