Yuhang Yao(@yuhang_yao):GLM-5.2 is now just 0.005 away from Fable-5 in visual spec-to-app development. On VISTA’s latest C4 leaderboard: 🥇 Claude Code + Fable-5 — 0.274 🥈 Claude Code + GLM-5.2 — 0.269 🥉 Claude Code + Opus 4.8 — 0.263 　 Claude Code + Sonnet 4.6 — 0.248 　 Cursor + Composer 2.5 — 0.212 　 Codex + GPT-5.5 — 0.205 The story is no longer just “which model writes better code.” For real app-building agents, performance is increasingly shaped by the full stack: 🧠 model 🛠️ harness 🔁 tool loop 👁️ visual understanding ⚙️ reasoning setup The harness is becoming part of the model. 🔗

2026.06.29 19:42

GLM-5.2 is now just 0.005 away from Fable-5 in visual spec-to-app development. On VISTA’s latest C4 leaderboard: 🥇 Claude Code + Fable-5 — 0.274 🥈 Claude Code + GLM-5.2 — 0.269 🥉 Claude Code + Opus 4.8 — 0.263 　 Claude Code + Sonnet 4.6 — 0.248 　 Cursor + Composer 2.5 — 0.212 　 Codex + GPT-5.5 — 0.205 The story is no longer just “which model writes better code.” For real app-building agents, performance is increasingly shaped by the full stack: 🧠 model 🛠️ harness 🔁 tool loop 👁️ visual understanding ⚙️ reasoning setup The harness is becoming part of the model. 🔗