GPT-5.1-Codex
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Input / 1M
$1.25
Output / 1M
$10.00
Context
400K
AA Intelligence
23.7
Pricing
via OpenRouter · USD per 1M tokens · synced 2026-10-24$1.25
input / 1M
$10.00
output / 1M
$0.13
cached input / 1M
$11.25
1M in + 1M out
- Context window
- 400,000 tokens
- Max output
- 128,000 tokens
- Providers
- 1
- Cheapest provider
- Azure · $1.25 / $10.00
- Best throughput
- —
- AA Intelligence / Coding / Agentic
- 23.7 / — / —
✓ Tool calling
✓ Reasoning
✓ Structured outputs
✓ Image input
✗ File input
✗ Audio input
✓ Prompt caching
Price history
tracking started — chart appears after 7 days of snapshots (6 recorded)Current: $1.25 input · $10.00 output per 1M tokens
Benchmarks
Third-party indices as published through OpenRouter — Artificial Analysis and Design Arena. Not measured by us.
- AA Intelligence Index
- 23.7
- AA Coding Index
- —
- AA Agentic Index
- —
Design Arena
CategoryEloWin %Rank
fullstack
1086
44.5%
#30
mobileapps
1191
53.4%
#20
webapps
1018
44%
#44
codecategories
1153
54.6%
#83
dataviz
1213
55.9%
#54
gamedev
1138
50.5%
#81
uicomponent
1235
60%
#46
website
1162
56.1%
#86
Providers
1 provider · per 1M tokens · last 30 min metrics| Provider | Quant | Context | Input | Output | Uptime | Tok/s |
|---|---|---|---|---|---|---|
| Azure | unknown | 400K | $1.25 | $10.00 | 100% | — |
Provider data from OpenRouter's endpoint listing, refreshed daily.
Specifications
- Organisation
- openai
- Released on OpenRouter
- 2025-11-13
- Context window
- 400,000 tokens
- Max output
- 128,000 tokens
- Input
- text, image
- Output
- text
- Tokenizer
- GPT
- Moderated by provider
- No
- OpenRouter id
- openai/gpt-5.1-codex
Compare with
Popular comparisons
Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.