Signal Google Releases Gemini 3.5 Flash: Frontier-Level Intelligence at 4x Speed

Summary

Google released Gemini 3.5 Flash on 19 May 2026, making it available in the Gemini app, AI Mode in Search, Google Antigravity, the Gemini API and enterprise platforms. The model achieved 76.2% on Terminal-Bench 2.1, 1656 Elo on GDPval-AA, 83.6% on MCP Atlas, and 84.2% on CharXiv Reasoning. Google describes it as running four times faster in output tokens per second than other frontier models, placing it in the top-right quadrant of the Artificial Analysis index for both intelligence and speed. It outperformed Gemini 3.1 Pro on coding and agentic benchmarks while costing less than half of other frontier models for long-horizon agentic tasks. A stronger variant, Gemini 3.5 Pro, is already in internal use with a rollout planned for the following month.