Overview
- Gemini 3.5 Pro, promised for June, missed multiple internal deadlines and remains in a limited enterprise preview rather than a public launch.
- Engineers concluded the model’s recursive tool-calling — the ability to chain software actions for multi-step coding tasks — has structural flaws that fine-tuning did not fix and ordered a ground-up rebuild.
- A late-June retraining run meant to improve coding performance yielded disappointing results and contributed to the decision to pause wider release.
- Google says it is testing 3.5 Pro with selected partners, including corporate testers and government participants, and is trialing an upgraded Flash build as a possible stopgap.
- Investors and employees are watching closely because coding capability drives enterprise revenue, rivals have shipped competitive models, and Alphabet’s shares have pulled back roughly 15% from their peak this year.