Gemini 3.5 Pro

Google has confirmed it is training Gemini 4 in what it calls its 'most ambitious pre-training run yet,' with CEO Sundar Pichai saying the next-generation model will need a 'much larger base model' to compete at the frontier. No specs, benchmarks, or firm release date have been disclosed, though historical cadence points to a November or December 2026 launch.

Google has delayed the release of Gemini 3.5 Pro past its June deadline due to coding performance issues. The company retrained the model in late June with new data but saw disappointing results, according to Bloomberg. An upgraded Flash model is now in testing with partners.