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GPT-5.1 Codex Mini

Multimodal
OpenAI

GPT-5.1 Codex Mini is a fast and efficient model for coding, optimized for quick code autocomplete, simple refactoring, and routine programming tasks. Delivers excellent performance for everyday coding tasks with low latency.

Key Specifications

Parameters
-
Context
400.0K
Release Date
November 11, 2025
Average Score
42.0%

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)
$0.25
Output (per 1M tokens)
$2.00
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
Accuracy on AIME 2025.Self-reported
42.0%

License & Metadata

License
proprietary
Announcement Date
November 11, 2025
Last Updated
February 20, 2026

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