Olmo 3.1 32B Think vs GPT-5.1-Codex-Mini: side-by-side summary

Olmo 3.1 32B Think 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.

Olmo 3.1 32B Think, from Ai2, has a 65,536-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

• Olmo 3.1 32B Think: 65,536 tokens
• GPT-5.1-Codex-Mini: 400,000 tokens

Price

• Olmo 3.1 32B Think: Pricing varies by provider
• GPT-5.1-Codex-Mini: $0.25/M tokens input, $2/M tokens output

Provided by

• Olmo 3.1 32B Think: Ai2
• GPT-5.1-Codex-Mini: OpenAI

• Olmo 3.1 32B Think model details, providers and pricing
• GPT-5.1-Codex-Mini model details, providers and pricing