Gemini 3.5 Pro
Google announced Gemini 3.5 Pro at I/O on May 19 with a June GA target — then the date slipped. The fresh leak wave (codename “Cappuccino”) points at a July 17 launch attempt with July 24 as fallback: a brand-new pretraining run, a 2M-token context window and a Deep Think reasoning mode. The market is more skeptical — its weight has slid into August. Whoever’s right, the second it answers on the public API, ArtificialWatch fires.
Leaks & news, newest first.
"Cappuccino" leak wave: July 17 target, 2M context, Deep Think
A fresh round of leaks says Gemini 3.5 Pro — internal codename Cappuccino — is targeting July 17 with July 24 as the fallback: an entirely new pretraining run, a 2M-token context window, a Deep Think reasoning mode, and big claimed jumps in web dev, UI generation and SVG work. The same leaks claim it beats GPT-5.6 and Claude Fable 5 in internal evals — vendor-internal numbers, unconfirmed by Google, so grade accordingly. Notably, the market disagrees on timing: July buckets have collapsed and the weight sits in August. via @pankajkumar_dev on X
Second week of July, still in preview
Gemini 3.5 Pro entered the second week of July in limited preview — no confirmed GA date, no published benchmarks, no final pricing. Enterprise teams are being told to evaluate on the preview at their own risk. via MarketScale
July 17 target — and a ground-up architectural rebuild
Reporting pegs the new launch window at July 17 and says Google abandoned the 2.5-era architecture for a ground-up redesign. Unconfirmed by Google — treat the date as sentiment, not schedule. via BigGo Finance
Why it slipped: tokens, coding, long-horizon reasoning
Early testers reportedly flagged token-efficiency concerns, coding performance below flagship bar, and long-horizon multi-step reasoning short of what I/O promised. Four senior Gemini researchers reportedly departed for Anthropic in the same stretch. via Bind AI
Unveiled at I/O with a June GA target
Google announced Gemini 3.5 Pro on the I/O mainstage and said it was targeting June for general availability — the target it has since walked past. via Google I/O
The official word.
"Quality refinements after early enterprise testing."
Google's reported framing of the GA slip · Jun 2026 — Google has not published a final GA date
Hear it the second 3.5 Pro goes GA.
We sweep Google's public API every 60 seconds. The moment Gemini 3.5 Pro answers outside the preview gate, your channels fire — email + Chrome push free, SMS and a phone call on paid tiers.