OpenAI › GPT-5.1 Codex Mini › Pricing
$0.25 / $2per 1M tokens in / out
#329on OpenRouter by tokens · 1.1B / week
Price sheetper 1M tokens
| Input | $0.25 | Azure |
| Output | $2 | |
| Context · max output | 400K · 128K | tokens |
Where to buy1 provider · per 1M tokens
| Provider | Input | Output | Context |
|---|---|---|---|
| Azure | $0.25 | $2 | — |
In OpenAI's line-upper 1M in / out
| GPT-6 Luna Decisions | $0.10 / — | −100% |
| GPT OSS 20B | $0.018 / $0.09 | −95% |
| GPT OSS 120B | $0.03 / $0.15 | −91% |
| GPT OSS Safeguard 20B | $0.07 / $0.20 | −85% |
| GPT-6 Luna | $0.10 / $0.50 | −71% |
| GPT OSS Safeguard 120B | $0.15 / $0.60 | −62% |
| GPT-5.4 Mini (2026-03-17) | $0.75 / $4.50 | 2.5× |
Cheaper for the same workvs GPT-5.1 Codex Mini at high
| MiMo v2.6 Pro thinkingOpen | -21% | score ×2.3 | $0.13 |
| DeepSeek V4.1 Flash 1017 maxOpen | -24% | score ×2.2 | $0.26 |
| Ling 3.1 Flash 1019 | -35% | score ×2.2 | $1.49 |
| Claude Haiku 5.5 max | -71% | score ×2.1 | $0.21 |
| MiniMax M3.1 Flash thinking | -62% | score ×2.1 | $0.22 |
Pricing questions
How much does GPT-5.1 Codex Mini cost?›
$0.25 per 1M input tokens and $2 per 1M output tokens.
Is GPT-5.1 Codex Mini free to use?›
There is no free API tier.
What is a cheaper alternative to GPT-5.1 Codex Mini?›
MiMo v2.6 Pro at thinking effort costs -21% per task with a score ×2.3 on .