GPT-5 Codex API price
Other versions: newer: GPT-5.1-Codex from $1.25 / $10.00. Compare versions
Cheapest at Cheaper Inference; 6 sellers compared below.
The only price here comes from Cheaper Inference, a seller we have not verified (our read). Test it on your own prompts before you rely on it.
Versions
| Version | What it is | Sellers | From, in / out per 1M |
|---|---|---|---|
| GPT-5 Codex this pagegpt-5-codex | Main listing | 6 | $0.81 / $6.50 |
| GPT-5.1-Codexopenai/gpt-5.1-codex | Newer generation | 10 | $1.25 / $10.00 |
Why there are several: the undated name can move to a newer build when the developer updates it, while a dated snapshot is meant to stay fixed, which can suit pipelines that need repeatable behaviour; an experimental build tests new features. Sellers price each version separately and not every seller offers every version, so check a seller's own docs for the build it serves.
Cost calculator: where to buy, and what it costs you
Pick a use case, a volume and a provider. Monthly figures assume 30 days.
1,500 input and 400 output tokens per request, 30% of input cached.
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[](https://easiapiai.com/m/openai--gpt-5-codex.html)HTML<a href="https://easiapiai.com/m/openai--gpt-5-codex.html"><img src="https://easiapiai.com/badge/openai--gpt-5-codex.svg" alt="GPT-5 Codex API: from $0.81 in / $6.50 out per 1M · Cheaper Inference · 20 Oct 2026" height="40"></a>- Context window
- 400K400,000 tokens
- Cached input
- from $0.081per 1M tokens
- Last checked
- 20 Oct, 17:14 UTC
Price history
Cheapest standard price per 1M tokens, recorded every 6 hours since 16 Oct 2026.
No price change has held for 12 hours since 16 Oct 2026.
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