OpenAI: GPT-5.1-Codex-Mini API Pricing
by openai · 400K context window ·
$0.250
Input /1M tokens
$2.000
Output /1M tokens
400K
Context window
Monthly Cost Examples
Assuming 50% input / 50% output token split
| Usage | Monthly cost |
|---|---|
| 100K tokens/month | $0.11 |
| 1M tokens/month | $1.12 |
| 10M tokens/month | $11.25 |
| 100M tokens/month | $112.50 |
Compare with other models
OpenAI: GPT-5.1-Codex-Mini vs OpenAI: GPT-4o →OpenAI: GPT-5.1-Codex-Mini vs OpenAI: GPT-4o-mini →OpenAI: GPT-5.1-Codex-Mini vs OpenAI: o1 →Automate your model selection
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