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High Reasoning

Codex Mini

Codex Mini is a fast, lightweight AI model optimized for scalable code generation, debugging, and understanding via natural language prompts in CLI workflows. Supercharge your development with low-latency performance, long context support, and seamless integration for efficient, cost-effective coding productivity.

400k Context
High Intelligence
The search results do not contain a specific training knowledge cutoff date for "Codex Mini." The only mention of Codex Mini in the results is a reference to GPT-5-Codex-Mini in a model release note, which indicates it's a recent model variant, but no cutoff date is provided for it. Unable to determine from available search results. Knowledge

Available for Chat, Vision, and File Uploads.

Performance Benchmarks

MMLU
84.8%
HumanEval
82.6%
HumanEval+
82.8%

How do you want to interact?

Start a Conversation

Ask anything.
Have a natural conversation, brainstorm ideas, draft emails, or ask for advice.

Start Chatting

Use a Persona

Specialized Experts.
Instruct the AI to act as a Coding Tutor, Marketing Expert, or Travel Guide.

Pick a Persona

Why use Codex Mini?

Fast Code Generation

Delivers rapid, low-latency code Q&A, edits, and generation optimized for CLI workflows

Instruction Following

Understands natural language prompts to interpret requests and return precise shell commands or code snippets

Function Calling

Supports function calling, streaming, structured outputs, and image input for versatile developer tasks

Capability Examples

CLI Code Generation
Generate a bash script to backup my home directory to an external drive.
#!/bin/bash\n\nBACKUP_DIR="/mnt/external/backup_$(date +%Y%m%d_%H%M%S)"\nmkdir -p "$BACKUP_DIR"\nrsync -av --exclude='.git' ~/"$BACKUP_DIR"\necho "Backup completed to $BACKUP_DIR"
Image to Code
Convert this screenshot of a button UI into React JSX code. (Image input)
jsx\nconst Button = () => (\n <button className="bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded">\n Click Me\n </button>\n); Here's the responsive React button matching the screenshot, with Tailwind CSS classes for styling.

How to use

1
Go to Chat

Navigate to the "AI Chat" page.

2
Select Model

Ensure Codex Mini is selected.

3
Type Prompt

Ask a question or paste code.

4
Interact

Refine the answer by replying to the AI.

Compare LLMs Side-by-Side

Is Codex Mini better than Claude 3.5 or Gemini? Test same prompts simultaneously in the Chat Playground.

Open Chat Playground

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