Google began rolling out Gemini 3.5 Pro in early July 2026, finally delivering on a model announced in May. The launch missed both May and June general availability targets, but it’s now in expanded Vertex AI enterprise preview and beginning gradual rollout to developer platforms.

Delays in AI model launches are common. Scaling training, running safety evals, and onboarding enterprise customers takes longer than expected. But each missed deadline raises questions about whether Google can keep pace with OpenAI’s release velocity.

Gemini 3.5 Pro’s Position

Gemini 3.5 Pro sits between the faster Gemini 3.5 Flash and the premium Gemini 2 model. It’s optimized for complex reasoning on enterprise workloads—financial modeling, code generation, document analysis.

OpenAI’s GPT-4o handles similar tasks and launched months earlier. Anthropic’s Claude 3.5 Opus is already deployed. Google’s gradual rollout feels defensive rather than innovative.

The Broader Battle

Google built search on speed and scale. It’s struggling to win on AI model quality because OpenAI moved faster on frontier models. Now Google must compete on enterprise integration and trust—areas where it has leverage but limited narrative.

For developers, choice is now abundant. That’s forcing Google to prove Gemini is worth integrating alongside Claude and GPT-4o.