Trader consensus on Polymarket assigns a 90.5% implied probability to "No" for Gemini 4.0—a next-generation large language model from Google DeepMind—releasing by June 30, 2026, driven by the absence of official announcements or roadmap signals amid ongoing refinements to Gemini 3, launched in November 2025 with subsequent 3.1 upgrades emphasizing reasoning and app integrations as recently as April 2026. Google's historical cadence of major model releases roughly annually, combined with no credible leaks on training progress or benchmarks surpassing Gemini 3's state-of-the-art capabilities, reinforces this skin-in-the-game skepticism, especially with just six weeks remaining. A surprise reveal at Google I/O on May 19-20 could shift sentiment, alongside potential competitive pressures from OpenAI or Anthropic accelerating timelines, though technical hurdles like scaling to rumored multi-trillion parameters remain substantial barriers.