Claude Opus 4.7 vs Grok 4.5

Claude Opus 4.7 and Grok 4.5 are both available through FastRouter's OpenAI-compatible API, so switching between them is a change of model id, not a new integration.

Claude Opus 4.7, from Anthropic, has a 1,000,000-token context window, costs from $5.00/1M input and $25.00/1M output tokens across 3 providers and scores 40.7 on the Artificial Analysis Intelligence Index.

Grok 4.5, from xAI, has a 500,000-token context window, costs $2.00/1M input and $6.00/1M output tokens and scores 38.8 on the Artificial Analysis Intelligence Index.

Grok 4.5 is the cheapest on input, 2.5× cheaper than the next model, Claude Opus 4.7 has the largest context window, Claude Opus 4.7 scores highest for intelligence, Claude Opus 4.7 leads on coding and Grok 4.5 has the highest throughput.