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GPT-5.1 Codex High

Multimodal
OpenAI

GPT-5.1 Codex High is optimized for complex coding tasks with extended reasoning capabilities. This version provides deep code analysis, architectural planning, and solving complex programming challenges.

Key Specifications

Parameters
-
Context
400.0K
Release Date
November 11, 2025
Average Score
97.0%

Timeline

Key dates in the model's history
Announcement
November 11, 2025
Today
March 25, 2026

Technical Specifications

Parameters
-
Training Tokens
-
Knowledge Cutoff
-
Family
-
Capabilities
MultimodalZeroEval

Pricing & Availability

Input (per 1M tokens)
$1.25
Output (per 1M tokens)
$10.00
Max Input Tokens
400.0K
Max Output Tokens
128.0K
Supported Features
Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning

Benchmark Results

Model performance metrics across various tests and benchmarks

Other Tests

Specialized benchmarks
AIME 2025
Self-reported
97.0%

License & Metadata

License
proprietary
Announcement Date
November 11, 2025
Last Updated
January 22, 2026

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