@amin.json: Tencent just open-sourced HY4 Preview, a 770B parameter AI model built for coding and AI agents with a massive 1M token context window. It claims to outperform GPT 5.6 on some benchmarks and lets developers run and fine-tune it freely. A game-changer in AI coding tools and open-source innovation. #hy4preview #tencentai #aicoding #opensourceai #aidevelopment