GPT-5.6 Terra Pro vs Sakana Namazu: side-by-side summary

GPT-5.6 Terra Pro and Sakana Namazu are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.6 Terra Pro, from OpenAI, has a 1,050,000-token context window and is priced at $2/M tokens input, $12/M tokens output on OpenRouter.

Sakana Namazu, from sakana, has a 262,144-token context window and is priced at $0.95/M tokens input, $4/M tokens output on OpenRouter.

Context window

• GPT-5.6 Terra Pro: 1,050,000 tokens
• Sakana Namazu: 262,144 tokens

Price

• GPT-5.6 Terra Pro: $2/M tokens input, $12/M tokens output
• Sakana Namazu: $0.95/M tokens input, $4/M tokens output

Provided by

• GPT-5.6 Terra Pro: OpenAI
• Sakana Namazu: sakana

• GPT-5.6 Terra Pro model details, providers and pricing
• Sakana Namazu model details, providers and pricing