Google’s rapid Flash iteration cycle shapes current odds, with 3.8 Flash shipping September 2, 2026—its third release in six weeks—after 3.7 Flash in mid-August and 3.6 in July. Each update emphasizes gains in long-horizon software engineering, agentic workflows, and multi-step reasoning at fixed low pricing, while Pro models remain stalled at 3.1 and the new frontier Gemini 4 Argon launched in limited cyber-defender access. Traders see the pattern of frequent, incremental Flash drops as evidence that 3.9+ could arrive before year-end or at the next major developer event, though Google has not confirmed timelines or benchmarks beyond the current 3.8 generation.