Gemini 3.5 Pro enters enterprise preview with 2M context and Deep Think reasoning. Developer guide to confirmed specs, pricing expectations, and access before G

Gemini 3.5 Pro enters enterprise preview with 2M context and Deep Think reasoning. Developer guide to confirmed specs, pricing expectations, and access before G

Claude Opus 4.8, Gemini 3.5 Pro, and GPT-5.6 each win on different dimensions. June 2026 developer guide to choosing the right frontier model for production.