Dev Tests Opus 5: Faster Without Thinking but Error-Prone
davidad · x · 2026-08-22
Developer davidad observed that running Opus 5 with thinking=off yields faster answers but frequent errors, whereas thinking=on is slower and more stable. Opus 4.6 shows lower capability ceilings with thinking=off but significantly fewer mistakes.
Related event: Tests Show Opus 5 Faster Without Thinking but Prone to Errors(4 posts)→
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