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May 6, 2026

OpenAI Ships GPT-5.5 Instant as ChatGPT's New Default — AI the News That's Fit to Prompt #42

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AI the News That's Fit to Prompt
WEDNESDAY, MAY 6, 2026 · VOL. 1, NO. 42 · 11 STORIES
Lead · AI Models
OpenAI Ships GPT-5.5 Instant as ChatGPT's New Default

OpenAI quietly swapped the default model behind ChatGPT for GPT-5.5 Instant, with a math benchmark jump from 65 to 81 and reduced hallucination on legal, medical, and financial answers. No keynote, no new tier, just a smarter default.

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...plus three Simon Willison plugin releases, an editorial cartoon, and a word search puzzle.
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