Overview
Claude Opus 4.8 (Fast) vs Grok Build 0.1: side-by-side summary
Claude Opus 4.8 (Fast) and Grok Build 0.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Opus 4.8 (Fast), from Anthropic, has a 1,000,000-token context window and is priced by the provider serving it on OpenRouter.
Grok Build 0.1, from SpaceXAI, has a 256,000-token context window and is priced at $1/M tokens input, $2/M tokens output on OpenRouter.
- Context window
- Claude Opus 4.8 (Fast): 1,000,000 tokens
- Grok Build 0.1: 256,000 tokens
- Price
- Claude Opus 4.8 (Fast): Pricing varies by provider
- Grok Build 0.1: $1/M tokens input, $2/M tokens output
- Provided by
- Claude Opus 4.8 (Fast): Anthropic
- Grok Build 0.1: SpaceXAI