Rumor: Anthropic's Opus 5.5 was a massive leap that blindsided OpenAI's plans
haider1 · x · 2026-10-04
Unverified claim from haider1: Anthropic caught OpenAI off guard — OpenAI reportedly expected an incremental Opus release on par with gpt-5.6 sol and was confident 6.1 astra would match the next frontier model, but Opus 5.5 turned out to be a massive leap over 5.1. Treat as rumor.
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