Claude Haiku 4.5
Nothing here. The model returned empty. We stared at it for a while.
Claude Haiku 4.5 vs xAI: Grok 4
Compare Claude Haiku 4.5 by Anthropic against xAI: Grok 4 by xAI, context windows of 200K vs 256K, tested across 38 shared challenges. Updated April 2026.
Which is better, Claude Haiku 4.5 or xAI: Grok 4?
Claude Haiku 4.5 and xAI: Grok 4 are both competitive models. Claude Haiku 4.5 costs $1/M input tokens vs $3/M for xAI: Grok 4. Context windows: 200K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Haiku 4.5 and xAI: Grok 4
Claude Haiku 4.5 is made by anthropic while xAI: Grok 4 is from xai. Claude Haiku 4.5 has a 200K token context window compared to xAI: Grok 4's 256K. On pricing, Claude Haiku 4.5 costs $1/M input tokens vs $3/M for xAI: Grok 4.
Our Verdict
Claude Haiku 4.5
xAI: Grok 4
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Claude Haiku 4.5 is 3.0x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
97%
Claude Haiku 4.5 uses 3.9x more transitions
Claude Haiku 4.5
xAI: Grok 4
61%Vocabulary53%
47wSentence Length18w
0.64Hedging0.67
5.1Bold2.7
6.3Lists2.7
0.20Emoji0.07
2.46Headings0.86
0.17Transitions0.04
Based on 24 + 21 text responses
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279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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