Claude Haiku 4.5 vs Grok 4.1 Fast: side-by-side summary

Claude Haiku 4.5 and Grok 4.1 Fast are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Haiku 4.5, from Anthropic, has a 200,000-token context window and is priced at $1/M tokens input, $5/M tokens output on OpenRouter.

Grok 4.1 Fast, from SpaceXAI, has a 2,000,000-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Claude Haiku 4.5: 200,000 tokens
• Grok 4.1 Fast: 2,000,000 tokens

Price

• Claude Haiku 4.5: $1/M tokens input, $5/M tokens output
• Grok 4.1 Fast: Pricing varies by provider

Provided by

• Claude Haiku 4.5: Anthropic
• Grok 4.1 Fast: SpaceXAI

• Claude Haiku 4.5 model details, providers and pricing
• Grok 4.1 Fast model details, providers and pricing