Claude Haiku vs Opus on 25 real bugs: 52 vs 54 clean fixes, 95% cheaper
This story is from 2026-10-25. It is preserved in the archive; the latest stories are on the live feed.
Last week I measured where Claude Haiku 5.5 falls behind Opus. The answer was one hard bug in the marked parser, where Sonnet and Opus caught an edge case the bug report left out and Haiku mostly did not. One bug is thin evidence, so this time I gave the three models 25 real bugs. Short version: Ha…
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- 2026-10-25 01:21 · DEV Community — AI
Claude Haiku vs Opus on 25 real bugs: 52 vs 54 clean fixes, 95% cheaper