55-challenge benchmark: Haiku 5.5 matches GPT-6-Luna on cost, Claude faster overall
krauq_com · reddit · 2026-10-09
The author ran 55 pass/fail challenges comparing Claude effort levels against GPT effort levels on cost, speed, and accuracy.
- On relatively easy challenges, Haiku 5.5 is neck-and-neck with GPT-6-Luna on cost
- Claude is generally faster even accounting for GPT's fast mode
- The optimal effort level depends on task difficulty — no one-size-fits-all setting
Screenshots show results for challenge 1 of 55; a fuller breakdown is at krauq.ai.
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