Anthropic timed Opus 5.5 and Sonnet 5.5 to undercut OpenAI, post claims

Ananth @Ananth7eOriginally posted 2026.09.28

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anthropic is trying to steal openai's spotlight. look at the timing. opus 5.5 dropped the same day as gpt-6 sol and luna. and now partners and some users are testing a new sonnet 5.5 checkpoint, with release reportedly set for tuesday next week. the same day as openai's devday. devday has been on the calendar since april, anthropic knows exactly when it is. it worked with opus 5.5 as it took almost all of the attention from gpt-6 sol/luna launch.