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
Compare GPT-5.1-Codex
These links open full side by side pages for GPT-5.1-Codex. We picked pairs that people often shop together. 6 ready to open.
Locked
Compare with
Pick a model on both sides.
Popular GPT-5.1-Codex comparisons
- GPT-5.1-Codex vs GPT-4o
Compare pricing side by side
- GPT-5.1-Codex vs GPT-4o mini
Compare pricing side by side
- GPT-5.1-Codex vs o3
Compare pricing side by side
- GPT-5.1-Codex vs Claude Sonnet 4.6
Compare pricing side by side
- GPT-5.1-Codex vs Gemini 2.0 Flash
Compare pricing side by side
- GPT-5.1-Codex vs Llama 3.1 70B
Compare pricing side by side
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...
Also from OpenAI
Other models by OpenAI with live pricing in our catalog.