Event Brief
May 5, 2026 at 2:04 PM ET
OpenAI releases GPT-5.5 Instant as ChatGPT default
By The BriefBrief
OpenAI released GPT-5.5 Instant, saying it reduces hallucinations while keeping low latency.
WHO: OpenAI
WHAT: Release of GPT-5.5 Instant as ChatGPT’s default model
WHEN: May 5, 2026 at 1:00 PM ET
WHERE: Location not specified
WHY: No specific cause was reported.
Reporting from 2 identified publishers across this event arc.
View all 2 publishers
Publishers represented across this event arc
These publishers contributed reporting to the broader event history. Not every source addresses the specific development described above.
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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