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Claude Opus 5.5 reportedly in stealth testing

TestingCatalog cited rumors of a launch the week of September 21. A separate account said Polymarket odds for Anthropic’s next Opus release on September 21 had jumped to 88%.

18 Sources, 27d ago, updated 27d ago

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Claude Opus 5.5 reportedly in stealth testing

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Claude Opus 5.5 reportedly in stealth testing