A single cohesive paragraph summarizing the article body: Google’s anticipated Gemini 3.5 Pro model is subject to contradictory leaks, with some claiming it beats Claude Fable 5 and GPT-5.6 while others say it falls behind both. A July 17 launch target has been reported by multiple outlets as a leaked internal date, not officially announced. A 2 million token context window is plausible but unconfirmed. Private/limited testing is consistent across multiple reports, and public rollout preparations are reported with no confirmed date beyond the July 17 target. One widely shared leak claims a stealth-tested version beat Claude Fable 5 on a front-end coding task, while a separate leak claims the model lags behind both Fable 5 and GPT-5.6 on reasoning and coding; neither leak has published reproducible data, and neither Google nor Anthropic has commented. Google reportedly scrapped its original plan to build 3.5 Pro on the older Gemini 2.5 Pro base, opting for a fresh pretraining run, which explains a slip from an originally planned June launch. Leaks also consistently point to major improvements in front-end code generation, UI design quality, and SVG output, alongside a rumored “Deep Think” enhanced-reasoning mode.