Kimi K3 vs GPT-5.6 Terra Pro: side-by-side summary

Kimi K3 and GPT-5.6 Terra Pro are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Kimi K3, from moonshotai, has a 1,048,576-token context window and is priced at $2.55/M tokens input, $12.75/M tokens output on OpenRouter.

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.

Context window

• Kimi K3: 1,048,576 tokens
• GPT-5.6 Terra Pro: 1,050,000 tokens

Price

• Kimi K3: $2.55/M tokens input, $12.75/M tokens output
• GPT-5.6 Terra Pro: $2/M tokens input, $12/M tokens output

Provided by

• Kimi K3: moonshotai
• GPT-5.6 Terra Pro: OpenAI

• Kimi K3 model details, providers and pricing
• GPT-5.6 Terra Pro model details, providers and pricing