Claude 3 Opus vs Grok Code Fast 1
Compare Claude 3 Opus by Anthropic against Grok Code Fast 1 by xAI, context windows of 200K vs 256K, tested across 12 shared challenges. Updated April 2026.
Which is better, Claude 3 Opus or Grok Code Fast 1?
Claude 3 Opus and Grok Code Fast 1 are both competitive models. Claude 3 Opus costs $15/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 200K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Claude 3 Opus and Grok Code Fast 1
Claude 3 Opus is made by anthropic while Grok Code Fast 1 is from xai. Claude 3 Opus has a 200K token context window compared to Grok Code Fast 1's 256K. On pricing, Claude 3 Opus costs $15/M input tokens vs $0.2/M for Grok Code Fast 1.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Grok Code Fast 1 is 50x cheaper per token — worth considering if cost matters.
Style Comparison
Grok Code Fast 1 uses 280.1x more bold
vs
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Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
