z-ai/glm-5.3GLM-5.3 is Z.ai (Zhipu AI)’s proprietary AI model, released Aug 14, 2026. It costs $1.40/M input and $4.40/M output tokens, and handles a 1M-token context window. Its strongest use case is coding, where it ranks in the 96th percentile of the models Model Beat tracks.
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks.
Scores on standardized evaluations. Higher is better — and rank shows where GLM-5.3 lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks.
GLM-5.3 is an AI model developed by Z.ai (Zhipu AI), released Aug 14, 2026.
GLM-5.3's list price from Z.ai (Zhipu AI) is $1.40 per million input tokens and $4.40 per million output tokens.
GLM-5.3 supports a context window of up to 1M tokens.
On standardized evaluations tracked by Epoch AI, GLM-5.3 scores 56.5% on SciCode, 91.7% on GPQA Diamond, 42.3% on Humanity's Last Exam.
GLM-5.3 is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Aug 20, 2026.