GLM 4.5 Air vs GPT-5 Chat (Comparative Analysis)
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Comparative Analysis: GLM 4.5 Air vs. GPT-5 Chat
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Overview
GLM 4.5 Air was released 13 days before GPT-5 Chat.
 GLM 4.5 Air |  GPT-5 Chat | |
|---|---|---|
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 | 128K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 98.3K tokens | 16.4K tokens |
Release Date When this model first became publicly available | July 25, 2025 1 year ago July 25th, 2025 | August 7, 2025 11 months ago August 7th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | December 31, 2024 | September 30, 2024 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GLM 4.5 Air | GPT-5 Chat | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📁File🖼️Image📝Text |
Reasoning Controls Defaults and configurable reasoning effort | Optional | Not reported |
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 OutputReasoning Mode✓Content Moderation |
Open Source Model availability | Available on HuggingFace → | Proprietary |
Pricing
GLM 4.5 Air is roughly 0.1x less expensive compared to GPT-5 Chat for input tokens and roughly 0.08x less expensive for output tokens.
| GLM 4.5 Air | GPT-5 Chat | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.13 per million tokens | $1.25 per million tokens |
Output Token Cost Cost per million output tokens | $0.85 per million tokens | $10.00 per million tokens |
Web Search Cost Additional cost for each web search operation | Not specified | $0.01 per search |
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 GPT-5 Chat.
| GLM 4.5 Air | GPT-5 Chat | |
|---|---|---|
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,222 Elo (#42 in Data Viz (59.4% win rate)) | Benchmark not available. |
At a Glance
Quick overview of what makes GLM 4.5 Air and GPT-5 Chat 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-5 Chat by OpenAI understands both text and images, generates structured data. It can handle standard conversations with its 128K token context window. Reasonably priced at $1.25/M input and $10.00/M output tokens. Includes built-in content moderation for safer outputs. Released August 7th, 2025.Explore More Comparisons
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