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Google delays Gemini 3.5 Pro to July 17 after scrapping its architecture for a full rebuild

Google DeepMind pushed Gemini 3.5 Pro from June to July 17, 2026, after discarding the existing 2.5 Pro architecture entirely; Alphabet lost US$225 billion in market value in a single session; four senior DeepMind researchers departed for rivals; DeepSeek is forcing an API migration for all users by July 24

AI· active The Long Game·Whose Money ·4 takes · ·rbtfl upd Jul 8, 2026
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The split

The same story, as told by newsrooms in different countries. Their words, attributed and linked.

Global

BigGo Finance

“Google DeepMind has delayed the release of its Gemini 3.5 Pro AI model to July 17, 2026, scrapping the existing 2.5 Pro architecture for a complete rebuild.”

financial/tech aggregatorread the original ↗

United States

The Agent Report

“Gemini 3.5 Pro slipped from June to July 2026 while four top DeepMind researchers including Transformer co-inventor Noam Shazeer and Nobel laureate John Jumper left for OpenAI and Anthropic. Markets erased $225B from Alphabet in a single session.”

AI industry specialistread the original ↗

United States

TechTimes

“Gemini 3.5 Pro targets July 17 after Google scrapped its base model for a ground-up rebuild. DeepSeek API migration is mandatory before July 24, 2026, after that deepseek-chat and deepseek-reasoner return errors.”

US tech media; covers both Google and DeepSeek anglesread the original ↗

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Summary

Google DeepMind delayed Gemini 3.5 Pro to July 17, 2026, after discarding the Gemini 2.5 Pro architecture entirely in favour of a ground-up rebuild, a decision that erased US$225 billion from Alphabet's market cap in a single session. The delay comes as four senior DeepMind researchers, including Transformer co-inventor Noam Shazeer and Nobel laureate John Jumper, have moved to OpenAI and Anthropic. Separately, DeepSeek is forcing all API users to migrate to its V4 model by July 24, after which its older deepseek-chat and deepseek-reasoner endpoints will stop functioning, adding enterprise obligations under Chinese data law.

Why it matters

The talent exodus and architectural reset at DeepMind, combined with the forced migration at DeepSeek, compress the window before all three frontier labs, Google, OpenAI, and DeepSeek, release significantly upgraded models simultaneously. Enterprise teams that have built on any of these APIs face hard deadlines this month.

What to watch

  • Whether Google ships Gemini 3.5 Pro on July 17 or slips again
  • OpenAI's timing for GPT-5.6, which was reportedly targeted at the same window
  • Developer uptake of DeepSeek V4 before the July 24 cutoff
  • Further senior departures from Google DeepMind

The briefing, by email