Overview
GPT-5 Codex vs GPT-5.1-Codex-Mini: side-by-side summary
GPT-5 Codex and GPT-5.1-Codex-Mini are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5 Codex, from OpenAI, has a 400,000-token context window and is priced by the provider serving it on OpenRouter.
GPT-5.1-Codex-Mini, from OpenAI, has a 400,000-token context window and is priced at $0.25/M tokens input, $2/M tokens output on OpenRouter.
- Context window
- GPT-5 Codex: 400,000 tokens
- GPT-5.1-Codex-Mini: 400,000 tokens
- Price
- GPT-5 Codex: Pricing varies by provider
- GPT-5.1-Codex-Mini: $0.25/M tokens input, $2/M tokens output
- Provided by
- GPT-5 Codex: OpenAI
- GPT-5.1-Codex-Mini: OpenAI