GLM-5.3-Flash is a native multimodal model from Z.ai.
Z.ai
Agentic coding, low hallucination, planning.
Laboratory Overview
Zhipu AI (Z.ai) is one of the premier bilingual foundation model developers. Their GLM-5 series provides high-throughput general reasoning, coding, and knowledge synthesis across diverse languages.
Strict Zero Data Retention (ZDR): Requests are processed ephemerally in RAM. No user data, prompts, or completions are stored, indexed, or used for model training.
Z.ai Foundation Models (6)
Available under ARMES unified subscription without separate API keys or billing agreements.
GLM-5.3 (z-ai/glm-5.3) is Z.ai's flagship text-only reasoning model, built on a 753B-parameter sparse Mixture-of-Experts transformer with DeepSeek Sparse Attention. It is a post-training-only upgrade of the GLM-5.2 base, purpose-engineered for long-horizon software engineering, terminal/CLI agent tasks, and emergent cyber-reasoning, delivering a 1M-token context window at ~70 tokens/sec.
GLM-5.2 (z-ai/glm-5.2) is Z.ai's open-weights flagship reasoning model — a ~743B-parameter sparse Mixture-of-Experts (MoE) with ~39–40B active parameters per token, a 1M-token context window, sparse attention via the novel IndexShare indexer, and up to 5-token MTP speculative decoding. Released June 16, 2026 under MIT license, it is purpose-built for long-horizon agentic workflows and project-level software engineering, landing between Claude Opus-tier and GPT-5.x-tier models on the hardest coding/agentic suites while debuting as the top open-weight model on the Artificial Analysis Intelligence Index.
GLM-5.1 is a high-performance foundation model engineered by Z.ai, accessible with Zero Data Retention on ARMES.
Agentic coding, complex planning, knowledge-intensive tasks
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