GLM-5.3 surpasses Kimi K3 and to some extent Claude Fable 5 or GPT-5.6-Sol on many benchmarks, putting it at the frontier of agentic coding benchmarks with only ~750B parameters – a third of Kimi K3.

Z.ai's GLM-5.3, now available only in the coding plan, shows a striking increase in scores, surpassing Kimi K3 on many benchmarks and some frontier models on others, with only about 750B parameters. ✦ AI generated

SemiAnalysis (article author) · Interconnects · 2026-08-14 · original ↗

Today, Z.ai announced their GLM-5.3 model, currently only available in the coding plan, coming soon to their API and in two weeks’ time to Hugging Face (open weights). This model looks exceptional, with a somewhat astounding increase in scores. On many benchmarks the model has surpassed Moonshot AI’s Kimi K3 and on some it’s surpassed Claude Fable 5 or GPT-5.6-Sol.

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