GPT-5.6 Luna vs Command A: side-by-side summary

GPT-5.6 Luna and Command A are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.6 Luna, from OpenAI, has a 1,050,000-token context window and is priced at $0.20/M tokens input, $1.20/M tokens output on OpenRouter.

Command A, from Cohere, has a 256,000-token context window and is priced at $2.50/M tokens input, $10/M tokens output on OpenRouter.

Context window

• GPT-5.6 Luna: 1,050,000 tokens
• Command A: 256,000 tokens

Price

• GPT-5.6 Luna: $0.20/M tokens input, $1.20/M tokens output
• Command A: $2.50/M tokens input, $10/M tokens output

Provided by

• GPT-5.6 Luna: OpenAI
• Command A: Cohere

• GPT-5.6 Luna model details, providers and pricing
• Command A model details, providers and pricing