Gemini 3.5 Flash Launches — Outperforms 3.1 Pro at 4x Speed, $1.50/M Input Tokens

Google Blog·high signal

Google released Gemini 3.5 Flash at I/O 2026, which outperforms Gemini 3.1 Pro across almost all benchmarks while running four times faster. Priced at $1.50/$9 per million input/output tokens with a 1M-token context window, it's the model powering Antigravity 2.0's Managed Agents. For builders, this is the new default for cost-sensitive agent workloads — frontier-class intelligence at Flash-tier pricing fundamentally changes the economics of multi-agent systems.