Compare Claude Sonnet 4 from Anthropic and Grok Code Fast 1 from SpaceXAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
Claude Sonnet 4 and Grok Code Fast 1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Sonnet 4, from Anthropic, has a 1,000,000-token context window and is priced at $3/M tokens input, $15/M tokens output on OpenRouter.
Grok Code Fast 1, from SpaceXAI, has a 256,000-token context window and is priced by the provider serving it on OpenRouter.