Hands-on Gemini 3.8 Flash: Rebuilds a Mobile Game in 35 Seconds, Matches Opus 5 at Fraction of Cost

WorldofAI · youtube · 2026-09-05

• YouTuber WorldofAI ran a full test of Google's newly released Gemini 3.8 Flash across coding, reasoning, agentic workflows, Three.js simulations, game dev, and long-horizon tasks.
• Highlights: extremely fast and cheap; the model rebuilds a mobile mini-game in 35 seconds and shows big one-shot game-gen improvements over Gemini 3.7 Flash, while approaching Claude Opus 5 performance at a fraction of the cost.
• The interesting wrinkle: real-world coding quality vs GPT-5.6 Sol is much closer than benchmark claims suggest, and the video digs into where each wins.
• Official Google blog and multiple third-party test links are included for cross-checking.

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