GLM 5.3 Flash beats Kimi K3 on same coding task at a third of the cost, self-repairs in 10 minutes
HowDevelop · x · 2026-08-31
A developer ran the same task on Zhipu's GLM 5.3 Flash and Moonshot's Kimi K3: build a GTA-style procedural open-world city in a single HTML file with zero assets. GLM 5.3 Flash shipped more of the world — traffic lights, crosswalks, pedestrians on sidewalks, plus revisit-able seeded cities via ?seed=N — at $5.54, roughly a third of Kimi K3's $16.89 for the same prompt.
Both models' initial code failed to run: Kimi's start screen was unclickable, GLM had a null dereference in its traffic AI — the harness only writes files and never opens a browser, so neither model ever saw its own output across 35 minutes of iteration. The difference came next: handed the bug report, GLM repaired itself in 10 minutes for $2.09 and stopped on its own, while Kimi never declared itself done. Tests ran through Nebius TF Relay.
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