Grok 3 Thinking vs Claude Sonnet 4

Compare Grok 3 Thinking by xAI against Claude Sonnet 4 by Anthropic, context windows of 128K vs 200K, tested across 8 shared challenges. Updated March 2026.

Which is better, Grok 3 Thinking or Claude Sonnet 4?

Grok 3 Thinking and Claude Sonnet 4 are both competitive models. Context windows: 128K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Grok 3 Thinking and Claude Sonnet 4

Grok 3 Thinking is made by xai while Claude Sonnet 4 is from anthropic. Grok 3 Thinking has a 128K token context window compared to Claude Sonnet 4's 200K.

Our Verdict
Grok 3 Thinking
Grok 3 Thinking
Claude Sonnet 4
Claude Sonnet 4

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
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