AI Model Daily - 2026-06-12

2026-06-12 AI model news: Claude Fable 5 (High) leads Agent Arena, GPT 5.5 (xHigh) appears in Agent Arena, Gemini Omni Flash and HappyHorse remain key video-arena signals, Ideogram 4.0 gets fresh open-weight image leaderboard attention, and Google DeepMind launches a multi-agent safety research fund.