Opus 5 debuts at No. 2 on Senior SWE-bench with 32% of Fable 5’s tokens
ajratner · x · 2026-07-25
Opus 5 debuts at #2 on Senior SWE-bench, just behind the current leader Fable 5.
According to the post, it reaches that result at 32% of Fable 5’s output tokens on average, and takes #1 overall on senior-level bug investigations.
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