Devstral 2 2512 vs GPT-5.1-Codex-Mini: side-by-side summary

Devstral 2 2512 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.

Devstral 2 2512, from Mistral AI, has a 262,144-token context window and is priced at $0.40/M tokens input, $2/M tokens output 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

• Devstral 2 2512: 262,144 tokens
• GPT-5.1-Codex-Mini: 400,000 tokens

Price

• Devstral 2 2512: $0.40/M tokens input, $2/M tokens output
• GPT-5.1-Codex-Mini: $0.25/M tokens input, $2/M tokens output

Provided by

• Devstral 2 2512: Mistral AI
• GPT-5.1-Codex-Mini: OpenAI

• Devstral 2 2512 model details, providers and pricing
• GPT-5.1-Codex-Mini model details, providers and pricing