GLM-5.3
GLM-5.3 by Z AI: bilingual foundation model featuring a 1M token context window, long-horizon reasoning, and enhanced tool-calling agent capabilities.
Model Overview
Capabilities, design details, and architectural traits
GLM-5.3 - Frontier Long-Context Foundation Model for Agentic Workflows
GLM-5.3 is Zhipu AI's (Z AI) flagship foundation model, engineered specifically for extended long-horizon reasoning, complex multi-step agentic execution, and high-fidelity bilingual comprehension across English and Chinese. It builds upon the GLM-5 architecture with substantial upgrades to token processing efficiency, retrieval-augmented reasoning over massive document corpora, and autonomous tool use.
| Trait | Detail |
|---|---|
| Context Window | 1,000,000 tokens (1M tokens) native context capacity |
| Bilingual Mastery | Proficiency in Chinese and English reasoning, translation, and synthesis |
| Agentic Workflows | Native multi-turn tool calling, structured JSON output, and robust API orchestration |
| Core Architecture | Optimized MoE / dense transformer hybrid with rotary position embeddings (RoPE) for stable long-context needle retrieval |
| Efficiency Focus | Lower latency per token generation and high throughput for production developer deployment |
Long-Context Reasoning & Agentic Capabilities
With its 1M token context window, GLM-5.3 excels at ingesting entire repositories of code, multi-volume legal and financial dossiers, and extensive conversational histories without loss of retrieval fidelity. The model incorporates fine-grained reasoning policies that allow it to plan, call external tools, and verify intermediate results before producing final outputs, making it ideal for agent-driven software engineering and enterprise research systems.
Benchmark Performance
Independent evaluations · Artificial Analysis
Accuracy & Capability Details
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Evaluate specifications, pricing, and independent benchmark indices
| Model Details | |||
|---|---|---|---|
| General Info | |||
| Provider | Z AI | Anthropic | Anthropic |
| Release Date | August 18, 2026 | September 22, 2026 | September 28, 2026 |
| Knowledge Cutoff | - | - | Jun 2026 |
| Context & Limits | |||
| Context Window | 1M | 1M | 1M |
| Pricing (per 1M tokens) | |||
| Input Pricing | $1.40 Best Input Pricing | $4 | $2 |
| Output Pricing | $4.40 Best Output Pricing | $20 | $10 |
| Modalities | |||
| Inputs | text | textimagefile | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | 44.8 | 57.6 Best Intelligence Index | 56.0 |
| Coding Index | 74.8 | - | - |
| Agentic Index | 53.1 | - | - |
Humanity's Last Exam
Extremely difficult logical reasoning and knowledge.
Long Context Reasoning
Logical reasoning over long context windows.
SciCode Benchmark
Scientific coding and mathematical modeling.
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.
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