GPT-5 Codex
openai/gpt-5-codex
OpenAI's GPT-5 Codex, released on 2025-01-01, accepts text and image inputs and produces text outputs with a context length of up to 400,000 tokens. It supports tool integration and reasoning features, is not open‑weight, and is priced at $1.25 per million input tokens and $10 per million output tokens.
- tool use
- structured outputs
- reasoning
At a glance
Specifications
What the API gives you
- Context window
- 400K tokens
- Max output
- 128K tokens
- Input price
- $1.25 / 1M tokens
- Output price
- $10 / 1M tokens
- Cache read
- $0.13 / 1M tokens
- Modalities
- text, image → text
- Knowledge cutoff
- Sep 30, 2024
- Released
- Jan 1, 2025
Recommendation coverage
Where this model appears
Not currently included in a published recommendation. This means the available task-specific evidence did not support a ranking yet—not that the model was reviewed and rejected.
Benchmarks
No independent benchmark results are linked to this model yet. We keep it visible while withholding quality claims until usable results arrive.
Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.