gpt-5.1-codex-max

Common Name: GPT-5.1 CodeX Max

OpenAI
-80%On SaleReleased on Nov 25 12:00 AMKnowledge Cutoff Sep 30, 2024 12:00 AMSupportedTool InvocationSupportedReasoning
Terminal#1
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GPT-5.1-Codex-Max is a version of GPT-5.1-Codex with enhanced capabilities for agentic coding tasks.

Specifications

Context
400K
Maximum Output
128K
Inputtext, image
Outputtext

Performance (7-day Average)

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Pricing

Standard
Flex
Batch
Input/MTokens
$0.25
$0.13
$0.13
Output/MTokens
$2.00
$1.00
$1.00
Cached Input/MTokens
$0.03
$0.01
$0.01

Availability Trend (24h)

Performance Metrics (24h)

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GPT-5.1-Codex is a version of GPT-5 optimized for agentic coding tasks in Codex or similar environments. It's available in the Responses API only and the underlying model snapshot will be regularly updated. If you want to learn more about prompting GPT-5-Codex, refer to our dedicated guide