GPT-5-codex
gpt-5-codex
OpenAI · chat · api · seen 7m ago
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Context
400K
Max output
—
Input $/1M
$1.25
Output $/1M
$10.00
Modalities
text
Released
10 Sept 2025
AI summary
● machine-written
OpenAI releases GPT-5-codex with 400K context window
GPT-5-codex is a text-based chat model from OpenAI released September 10, 2025, available via API. The model supports a 400K token context window and is priced at $1.25 per million input tokens and $10.00 per million output tokens. It is positioned as a coding-focused variant within the GPT-5 family.
What's new
- Released September 10, 2025 (GA status)
- 400K token context window
- Pricing: $1.25/M input tokens, $10.00/M output tokens
- Text-based modality via OpenAI API
Best for
Code generation and coding tasksProfessional development workLarge context applications up to 400K tokens