OpenAI
OpenAI: GPT-5.1-Codex-Mini
openai/gpt-5.1-codex-mini
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
Input
$0.25
/ 1M tokens
Output
$2
/ 1M tokens
Context window
400K
tokens
Limits
Context
400,000
tokens
Max output
128,000
32% of the context window
Model facts
Author
OpenAI
Tokenizer
GPT
Modality
Text + Image -> Text
Created
Nov 13, 2025
Reasoning
RequiredDefault MediumHighMediumLow
Publication status
Hugging Face: unavailableLicense: not publishedParameter count: not published
Modalities
Input · ImageInput · TextOutput · Text
Generation controls
Include reasoningMax completion tokensReasoningReasoning effortResponse formatSeedStructured outputsTool choiceToolsVerbosity
Capability scores
20.4
Intelligence index
Better than 48% of models compared
Creative tasks
Category performance
Games
Top 75%1094 Elo
43.4% win
ASCII art
Top 87%1107 Elo
43.0% win
Websites
Top 78%1113 Elo
42.9% win
Code
Top 81%1096 Elo
41.5% win
UI components
Top 82%1080 Elo
41.0% win
Data visualization
Top 82%1098 Elo
40.6% win
SVG
Top 99%976 Elo
35.3% win
3D
Top 89%989 Elo
32.8% win