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Google Delays Gemini 3.5 Pro After Training Update Falls Short

Coding performance shortfalls have forced Google to extend testing with partners while it engages U.S. regulators.

Overview

  • Bloomberg reported Thursday that Gemini 3.5 Pro is months behind the June rollout Sundar Pichai announced at Google I/O.
  • Google updated the training data in late June to boost coding ability but internal tests showed the model still fell short of expectations.
  • A Google spokesperson said the company is testing 3.5 Pro and an upgraded Flash model with partners and continuing to ship other models.
  • Alphabet shares dropped roughly 3–4% after the delay was reported, underlining investor concern about execution in the AI race.
  • Rival releases such as OpenAI’s GPT-5.6 and actions by Anthropic have raised competitive and regulatory pressure that could affect Google’s product timing and enterprise plans.