Introducing Claude Opus 5
Claude @claudeai · x · 2026-07-24 · ★★★ · archived
Launch post for Opus 5, pitched as close to Fable 5 at half the price; its mixed reception led to Opus 5.5's writing fixes.
Summary
The Claude account introduced Opus 5 as 'a thoughtful and proactive model' close to Fable 5's frontier intelligence at half the price. Developer reception was mixed: X trending summaries collected complaints that it derails and is verbose, and Zvi Mowshowitz wrote 'Claude Opus 5 Is Highly Capable, But Is No Mythos' (x.com/TheZvi/article/2082166350701637794). Verified via syndication: 2026-07-24T16:59:51Z.
Archived text
Introducing Claude Opus 5.
It's a thoughtful and proactive model that comes close to the frontier intelligence of Fable 5 at half the price. https://t.co/GQWhcq2CQL
Media: https://pbs.twimg.com/media/HOAifjuWcAESshR.jpg
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Archived 2026-09-29 via syndication.
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