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

Olmo 3.1 32B Instruct and GPT-5.1 Chat 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 Chat, from OpenAI, has a 128,000-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Olmo 3.1 32B Instruct: 65,536 tokens
• GPT-5.1 Chat: 128,000 tokens

Price

• Olmo 3.1 32B Instruct: Pricing varies by provider
• GPT-5.1 Chat: Pricing varies by provider

Provided by

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

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