GPT-5 Image vs GPT-5.1 Chat: side-by-side summary

GPT-5 Image 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.

GPT-5 Image, from OpenAI, has a 400,000-token context window and is priced at $10/M tokens input, $10/M tokens output 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

• GPT-5 Image: 400,000 tokens
• GPT-5.1 Chat: 128,000 tokens

Price

• GPT-5 Image: $10/M tokens input, $10/M tokens output
• GPT-5.1 Chat: Pricing varies by provider

Provided by

• GPT-5 Image: OpenAI
• GPT-5.1 Chat: OpenAI

• GPT-5 Image model details, providers and pricing
• GPT-5.1 Chat model details, providers and pricing