GPT-5.1 Codex
GPT-5.1-Codex is a version of GPT-5.1 optimized for agentic coding tasks in Codex or similar environments.
text + image + file → text · made by OpenAI
Sold by 8 ways
| Seller | Lane | Rate |
|---|---|---|
| Databricks 0 ways | $1.25per Mtok in$10per Mtok out$0.13per Mtok cached$1.25per Mtok cache write | |
| Databricks cloudnot on the seller's list today | standard | $1.25per Mtok in$10per Mtok out$0.13per Mtok cached$1.25per Mtok cache writeraw.githubusercontent.com · read 2026-08-30 |
| DigitalOcean 0 ways | $1.25per Mtok in$10per Mtok out$0.12per Mtok cached | |
| DigitalOcean cloudnot on the seller's list today | standard | $1.25per Mtok in$10per Mtok out$0.12per Mtok cachedmodels.dev · read 2026-08-27 |
| Microsoft Azure AI cloud | standard | $1.25per Mtok in$10per Mtok out$0.12per Mtok cachedmodels.dev · read 2026-10-31 |
| Microsoft Azure AI cloud | priority | $2.5per Mtok in$20per Mtok out$0.25per Mtok cachedraw.githubusercontent.com · read 2026-10-31 |
| Nous Research aggregator | standard | $1.25per Mtok in$10per Mtok out$0.13per Mtok cachedinference-api.nousresearch.com · read 2026-09-12 |
| OpenRouter aggregator | standard | $1.25per Mtok in$10per Mtok out$0.13per Mtok cachedopenrouter.ai · read 2026-08-24 |
| Requesty 0 ways | $1.25per Mtok in$10per Mtok out$0.12per Mtok cached | |
| Requesty aggregatornot on the seller's list today | openai-responses | $1.25per Mtok in$10per Mtok out$0.12per Mtok cachedrouter.requesty.ai · read 2026-08-28 |
| Vercel AI Gateway aggregator | standard | $1.25per Mtok in$10per Mtok out$0.13per Mtok cachedai-gateway.vercel.sh · read 2026-08-25 |
Measured 12 standings
| Place | Board | Metric | Score |
|---|---|---|---|
| 34thof 68 | Design Arena · mobileapps (agents) | Elo | 1191 |
| 42ndof 132 | Ale bench — Epoch AI | Performance | 1244.92 |
| 43rdof 61 | Design Arena · fullstack (agents) | Elo | 1086 |
| 55thof 202 | Terminalbench — Epoch AI | Accuracy mean | 0.578 |
| 67thof 68 | Design Arena · webapps (agents) | Elo | 1007 |
| 71stof 157 | Design Arena · uicomponent (models) | Elo | 1232 |
| 77thof 154 | Design Arena · dataviz (models) | Elo | 1213 |
| 108thof 162 | Design Arena · gamedev (models) | Elo | 1138 |
| 113thof 163 | Design Arena · codecategories (models) | Elo | 1151 |
| 114thof 135 | Webdev arena — Epoch AI | Arena Score | 1336.28 |
| 115thof 141 | LMArena · WebDev | Score (Elo) | 1337 |
| 117thof 169 | Design Arena · website (models) | Elo | 1160 |
About
GPT-5.1 Codex — a text model from OpenAI, sold by 4 companies from $1.25 in and $10 out per million tokens, placed 55th 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 $1.25 in and $10 out per million tokens at Microsoft Azure AI. Beside the standard rate there is a faster lane. It has been measured on 12 boards, and stands best at 55th 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
- 272,000 tokens
- Published
- 2025
- Knowledge to
- September 2024
- Licence
- not read
- Sellers
- 4
- Maker's own price
- not read
- Price
- $1.25 in and $10 out per million tokens — Microsoft Azure AI
- Boards
- 12
- Best place
- 55th of 202 — Terminalbench — Epoch AI
Known as 4 names
GPT 5.1 Codex medium5.1 codexopenai/gpt-5.1-codexopenai-responses/gpt-5.1-codex