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brianletort.aiD. Brian Letort, Ph.D.

AI Market · Forecast desk · miss · software

58% · miss

Gemini 3.5 Pro reaches public general availability — a callable API model ID with published pricing — by July 31, 2026, after slipping past its June window and the reported July 17 target.

Back to the bookIssue 2026-W28Evidence ↗

Outcome

misscalled at 58%resolved August 1, 2026brier contribution 0.336conjunctive

Google's Jul 21 post still described Gemini 3.5 Pro as "testing with partners" while shipping 3.6 Flash / 3.5 Flash-Lite / Flash Cyber instead — no public GA gemini-3.5-pro model ID with published pricing appeared through Jul 31.

Evidence: https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-6-flash-3-5-flash-lite-3-5-flash-cyber/