GPT-5.1 Codex Mini
GPT-5.1 Codex mini is a smaller, faster, and cheaper version of GPT-5.1 Codex.
text + image + file → text · made by OpenAI
Sold by 6 ways
| Seller | Lane | Rate |
|---|---|---|
| Databricks 0 ways | $0.25per Mtok in$2per Mtok out$0.025per Mtok cached$0.25per Mtok cache write | |
| Databricks cloudnot on the seller's list today | standard | $0.25per Mtok in$2per Mtok out$0.025per Mtok cached$0.25per Mtok cache writeraw.githubusercontent.com · read 2026-09-22 |
| Microsoft Azure AI cloud | standard | $0.25per Mtok in$2per Mtok out$0.025per Mtok cachedmodels.dev · read 2026-10-31 |
| Microsoft Azure AI cloud | priority | $0.45per Mtok in$3.6per Mtok out$0.045per Mtok cachedraw.githubusercontent.com · read 2026-10-31 |
| Nous Research aggregator | standard | $0.25per Mtok in$2per Mtok out$0.03per Mtok cachedinference-api.nousresearch.com · read 2026-09-12 |
| OpenRouter aggregator | standard | $0.25per Mtok in$2per Mtok out$0.03per Mtok cachedopenrouter.ai · read 2026-08-24 |
| Vercel AI Gateway aggregator | standard | $0.25per Mtok in$2per Mtok out$0.03per Mtok cachedai-gateway.vercel.sh · read 2026-08-25 |
Measured 11 standings
| Place | Board | Metric | Score |
|---|---|---|---|
| 46thof 202 | Terminalbench — Epoch AI | Accuracy mean | 0.616 |
| 83rdof 93 | Design Arena · asciiart (models) | Elo | 1102 |
| 112thof 114 | Design Arena · svg (models) | Elo | 976 |
| 126thof 154 | Design Arena · dataviz (models) | Elo | 1097 |
| 126thof 135 | Webdev arena — Epoch AI | Arena Score | 1247 |
| 128thof 162 | Design Arena · gamedev (models) | Elo | 1092 |
| 129thof 141 | LMArena · WebDev | Score (Elo) | 1244 |
| 130thof 157 | Design Arena · uicomponent (models) | Elo | 1076 |
| 134thof 150 | Design Arena · 3d (models) | Elo | 986 |
| 134thof 163 | Design Arena · codecategories (models) | Elo | 1092 |
| 134thof 169 | Design Arena · website (models) | Elo | 1109 |
About
GPT-5.1 Codex Mini — a text model from OpenAI, sold by 4 companies from $0.25 in and $2 out per million tokens, placed 46th of 202 on Terminalbench — Epoch AI.
It takes text, images and files and returns text, with a context window of 400,000 tokens. It was published in 2025, trained on material up to September 2024. Its sellers say it can reason step by step and call a tool. The catalogue files it under code. Four companies sell it. The cheapest is $0.25 in and $2 out per million tokens at Microsoft Azure AI. Beside the standard rate there is a faster lane. It has been measured on 11 boards, and stands best at 46th of 202 on Terminalbench — Epoch AI.
Every current figure
- Maker
- OpenAI
- Register
- model
- Takes
- text + image + file
- Returns
- text
- Context
- 400,000 tokens
- Longest answer
- 128,000 tokens
- Published
- 2025
- Knowledge to
- September 2024
- Licence
- not read
- Sellers
- 4
- Maker's own price
- not read
- Price
- $0.25 in and $2 out per million tokens — Microsoft Azure AI
- Boards
- 11
- Best place
- 46th of 202 — Terminalbench — Epoch AI
Known as 2 names
5.1 codex miniopenai/gpt-5.1-codex-mini