WeavePrism

Claude Haiku 4.5 vs Grok 4.1 Fast

Grok 4.1 Fast costs 86% less at typical usage ($0.28 vs $2.00 per 1M tokens). Claude Haiku 4.5 scores higher on 8 of 11 tasks.

SpecClaude Haiku 4.5Grok 4.1 Fast
Input /1M$1.00$0.20
Output /1M$5.00$0.50
Typical /1M$2.00$0.28
Context window200k2M
SpeedBlazingFast
PrivacyStrongStandard
Open weightsNoNo
Claude Haiku 4.5
Steady since we started tracking (Jul 13, 2026)
Steady since we started tracking (Jul 13, 2026)
Grok 4.1 Fast
Steady since we started tracking (Jul 13, 2026)
Steady since we started tracking (Jul 13, 2026)

Quality by task

Coding88/82
Agents87/84
Reasoning84/84
Writing85/82
Chat88/86
Classify86/84
Extract86/84
Summarize87/85
Translate84/84
Vision84/84
General86/83

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Also compare Claude Haiku 4.5

Prices are list $/1M tokens, hand-maintained from public provider pricing. Task scores are benchmark-informed 0-100 estimates, not gospel — validate on your own evals before moving production traffic. Not affiliated with any model provider.