Olmo 3.1 32B Instruct vs GPT-5.1-Codex-Max: side-by-side summary

Olmo 3.1 32B Instruct and GPT-5.1-Codex-Max are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Olmo 3.1 32B Instruct, from Ai2, has a 65,536-token context window and is priced by the provider serving it on OpenRouter.

GPT-5.1-Codex-Max, from OpenAI, has a 400,000-token context window and is priced at $1.25/M tokens input, $10/M tokens output on OpenRouter.

Context window

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

Price

• Olmo 3.1 32B Instruct: Pricing varies by provider
• GPT-5.1-Codex-Max: $1.25/M tokens input, $10/M tokens output

Provided by

• Olmo 3.1 32B Instruct: Ai2
• GPT-5.1-Codex-Max: OpenAI

• Olmo 3.1 32B Instruct model details, providers and pricing
• GPT-5.1-Codex-Max model details, providers and pricing