Codex Mini
Codex Mini is OpenAI's language model with a 200K context window and up to 100K output tokens, available from 2 providers, starting at $1.50 / 1M input and $6.00 / 1M output. A fine-tuned variant of o4-mini optimized for use in Codex CLI, balancing coding capability with low latency for developer tooling.
Capabilities
Input3/5
Text✓
Image✓
Audio·
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities6/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling✓
Structured Outputs✓
Native JSON Schema✓
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·
Pricing by Provider
| Provider | Standard | ||
|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
 Azure AI Foundry | $1.50 | $6.00 | $0.375 |
OpenAI | $1.50 | $6.00 | $0.375 |
Cost Calculator
Preset:
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| Codex 5.1 Mini | — | — | — | — | Available |
| Codex Mini | — | 200K | $1.50 | $6.00 | Current |
Other models
| Model | Tier | Released | Context | Input / 1M | Output / 1M |
|---|---|---|---|---|---|
| Codex 5.1 | — | — | — | — | — |
| Codex 5.1 Max | — | — | — | — | — |
| Codex 5.2 | — | — | — | — | — |
| Codex 5.3 | — | — | — | — | — |