Z.AI
Ultra-low latency version of GLM-5.3-Flash engineered for high-concurrency real-time IDE code completion and interactive agents.
200K ctx$0.37 / 1M tok (Ultra-Low Latency MoE)
Introducing GLM-4.5-FlashZ.AIReleased July 28, 2025
GLM-4.5-Flash
Completely free, high-speed lightweight model supporting 200k context for developers and hobbyists.
text-to-textProprietary APIFree API (200k Context Flash)Context: 200K (200,000 tokens)Arena ELO: 1220
Technical Specifications
Architecture Type
Lightweight Fast Transformer
Total Parameters
Compact Scale
Context Window
200K (200,000 tokens)
Max Output Tokens
32.768K (32,768 tokens)
Knowledge Cutoff
June 2025
Supported Modalities
text, code
License & Access
Z.AI Free Tier Terms
Benchmark Evaluations
Mmlu
77.8
Humaneval
78
Chatbot Arena ELO
1220
Deep Architectural Overview
GLM-4.5-Flash provides a free-tier API with 200k context window support. Engineered for zero-cost rapid experimentation, content screening, and lightweight tool routing.
Strengths & Considerations
Core Strengths
- 100% Free API access
- 200,000 token context window
- High generation throughput and low latency
Known Limitations
- Rate limits apply on free tier; superseded by GLM-4.7-Flash
Token & API Pricing
Input Tokens (1M)$0.00
Output Tokens (1M)$0.00
Cached Input (1M)$0.0000
Pricing is verified directly against Z.AI's developer documentation and API rate sheets.
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