Grok 4 Fast vs Claude 4.6 Sonnet Max

Detailed comparison of capabilities, features, and performance.

Grok 4 Fast

Grok 4 Fast

xAI
VS
Claude 4.6 Sonnet Max

Claude 4.6 Sonnet Max

Anthropic
Feature Grok 4 Fast Claude 4.6 Sonnet Max
AI Lab xAI Anthropic
Context Size 2,000,000 tokens 1,000,000 tokens
Max Output Size 30,000 tokens 16,000 tokens
Frontier Model Yes Yes
Vision Support No Yes
Description Faster Grok 4 with identical quality (2m context). Low latency for time-sensitive tasks and huge context window. The latest Sonnet 4.6 model from Anthropic with effort set to max for highest reasoning and creativity, ideal for complex agentic tasks

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