GLM 4.5 Air vs gpt-oss-20b (Comparative Analysis)
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Comparative Analysis: GLM 4.5 Air vs. gpt-oss-20b
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Overview
GLM 4.5 Air was released 11 days before gpt-oss-20b.
 GLM 4.5 Air |  gpt-oss-20b | |
|---|---|---|
Model Provider The organization behind this AI's development | Z.AI | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 131.1K tokens | 131.1K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 98.3K tokens | Not specified tokens |
Release Date When this model first became publicly available | July 25, 2025 11 months ago July 25th, 2025 | August 5, 2025 11 months ago August 5th, 2025 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GLM 4.5 Air | gpt-oss-20b | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📝Text |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Other | GPT |
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 4.3x more expensive compared to gpt-oss-20b for input tokens and roughly 6.1x more expensive for output tokens.
| GLM 4.5 Air | gpt-oss-20b | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.13 per million tokens | $0.03 per million tokens |
Output Token Cost Cost per million outut tokens | $0.85 per million tokens | $0.14 per million tokens |
Benchmarks
Compare relevant benchmarks between GLM 4.5 Air and gpt-oss-20b.
| GLM 4.5 Air | gpt-oss-20b | |
|---|---|---|
MMLU Measures knowledge across 57 subjects like law, math, history, and science | Benchmark not available. | Benchmark not available. |
MMMU Measures understanding of combined text and images across various domains | Benchmark not available. | Benchmark not available. |
HellaSwag Measures common sense reasoning by having models complete sentences about everyday situations | Benchmark not available. | Benchmark not available. |
At a Glance
Quick overview of what makes GLM 4.5 Air and gpt-oss-20b 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.gpt-oss-20b by OpenAI can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 131.1K token context window. Very affordable at $0.03/M input and $0.14/M output tokens. Released August 5th, 2025.Explore More Comparisons
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Compare gpt-oss-20b with:
🚀Programming
Best models for coding and development
🎨Creative & Roleplay
Models optimized for creative writing
📢Marketing
Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
Scientific research and analysis
🌐Translation
Multilingual translation tasks