GPT-5.1-Codex pricing
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.... This page tracks 1 listing in total. Highlighted lows are $1.25 per million input and $10.00 per million output (see table for which seller matches each).
Pricing across providers
All figures are list prices per million tokens unless a column says otherwise. 1 offer is listed for GPT-5.1-Codex. Best input in this view: Openrouter.
| Provider | Input / 1M | Output / 1M | Cached input | Batch |
|---|---|---|---|---|
O Openrouter | $1.25 | $10.00 | — | — |
Input vs output · 1M tokens
Cost calculator
Pick any provider row and type how many tokens you expect per day, week, or year. We turn that into rough dollar totals for GPT-5.1-Codex.
0.125000¢ / req
0.500000¢ / req
Model specifications
Quick spec sheet for GPT-5.1-Codex before you dive back into pricing. Reported under OpenAI.
- Context window
- 400,000 tokens
- Max output
- 128,000 tokens
- Vision (images)
- Yes
- Tool / function calling
- Yes
- Streaming
- Yes
- Released
- Nov 2025
- Primary provider
- OpenAI
- Model family
- N/A
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Frequently asked questions
Read these after the table if you want plain language around GPT-5.1-Codex rates. The short model note from our index: 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 t...
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