Reddit bets Anthropic will crash OpenAI's DevDay with Sonnet 5.5 and Haiku 5.5
AirportEither2456 · reddit · 2026-09-26
Reddit speculation ahead of OpenAI's DevDay: Anthropic has confirmed Sonnet 5.5 and Haiku 5.5 are coming in the next few weeks, and the timing could deliberately shadow the event. Matching Opus 5.5's gains could yield fast, cheap, genuinely strong models — the combo OpenAI should fear. The poster sees no urgency for Fable 5.5 since Fable 5.1 remains strong and Opus 5.5 often nearly matches it at lower cost, and hopes OpenAI ships a real model rather than flashy demos.
Related event: Anthropic Reportedly Set to Ship Sonnet/Haiku 5.5 Ahead of OpenAI DevDay(2 posts)→
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