GLM 4.5 Air vs GLM 5.2 (Comparative Analysis)
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Comparative Analysis: GLM 4.5 Air vs. GLM 5.2
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Overview
GLM 4.5 Air was released 10 months before GLM 5.2.
 GLM 4.5 Air | GLM 5.2 | |
|---|---|---|
Model Provider The organization behind this AI's development | Z.AI | Z.AI |
Input Context Window Maximum input tokens this model can process at once | 131.1K tokens | 1M tokens |
Output Token Limit Maximum output tokens this model can generate at once | 98.3K tokens | 131.1K tokens |
Release Date When this model first became publicly available | July 25, 2025 1 year ago July 25th, 2025 | June 16, 2026 1 month ago June 16th, 2026 |
Knowledge Cutoff Latest training-data date reported by the provider | December 31, 2024 | Not reported |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GLM 4.5 Air | GLM 5.2 | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📝Text |
Reasoning Controls Defaults and configurable reasoning effort | Optional | Enabled by defaultEffort: Extra High, HighDefault: High |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Other | Other |
Key Features Advanced capabilities | ✓Function CallingStructured Output✓Reasoning ModeContent Moderation | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation |
Open Source Model availability | Available on HuggingFace → | Available on HuggingFace → |
Pricing
GLM 4.5 Air is roughly 0.2x less expensive compared to GLM 5.2 for input tokens and roughly 0.4x less expensive for output tokens.
| GLM 4.5 Air | GLM 5.2 | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.13 per million tokens | $0.70 per million tokens |
Output Token Cost Cost per million output tokens | $0.85 per million tokens | $2.21 per million tokens |
Cache Read Cost Cost to reuse cached input tokens | $0.02 per million tokens | $0.13 per million tokens |
Benchmarks
Compare relevant benchmarks between GLM 4.5 Air and GLM 5.2.
| GLM 4.5 Air | GLM 5.2 | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | Benchmark not available. | 51.1 (Artificial Analysis index; higher is better) |
Coding Index Programming performance across independent evaluations | Benchmark not available. | 68.8 (Artificial Analysis index; higher is better) |
Agentic Index Ability to complete multi-step agentic tasks | Benchmark not available. | 43.1 (Artificial Analysis index; higher is better) |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,225 Elo (#41 in Data Viz (59.4% win rate)) | 1,367 Elo (#3 in 3D (59.9% win rate)) |
At a Glance
Quick overview of what makes GLM 4.5 Air and GLM 5.2 unique.
GLM 4.5 Air by Z.AI can use external tools and APIs, offers advanced reasoning. It can handle standard conversations with its 131.1K token context window. Very affordable at $0.13/M input and $0.85/M output tokens. Released July 25th, 2025.GLM 5.2 by Z.AI can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 1M token context window. Reasonably priced at $0.70/M input and $2.21/M output tokens. Released June 16th, 2026.Explore More Comparisons
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