Claude Opus 4.5 was the first model that truly felt like a real software engineer
Agents reached a genuine breakthrough roughly four to five months ago. Developers felt this most clearly with Opus 4.5, which set a new high-water mark: for the first time, the model could take on a task that would have taken a real human engineer many hours — or even days — and execute it completely autonomously, shipping a clean pull request that a reviewer could simply approve. That experience, previously limited to coding, is now unlockable across every other domain.
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