GLM 4.5 Air vs GPT-4 Turbo Preview (Comparative Analysis)
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Comparative Analysis: GLM 4.5 Air vs. GPT-4 Turbo Preview
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Overview
GPT-4 Turbo Preview was released 1 year before GLM 4.5 Air.
 GLM 4.5 Air |  GPT-4 Turbo Preview | |
|---|---|---|
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 | 4.1K tokens |
Release Date When this model first became publicly available | July 25, 2025 1 year ago July 25th, 2025 | January 25, 2024 2 years ago January 25th, 2024 |
Knowledge Cutoff Latest training-data date reported by the provider | December 31, 2024 | December 31, 2023 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GLM 4.5 Air | GPT-4 Turbo Preview | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📝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 0.01x less expensive compared to GPT-4 Turbo Preview for input tokens and roughly 0.03x less expensive for output tokens.
| GLM 4.5 Air | GPT-4 Turbo Preview | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.13 per million tokens | $10.00 per million tokens |
Output Token Cost Cost per million output tokens | $0.85 per million tokens | $30.00 per million tokens |
Cache Read Cost Cost to reuse cached input tokens | $0.02 per million tokens | Not specified |
Benchmarks
Compare relevant benchmarks between GLM 4.5 Air and GPT-4 Turbo Preview.
| GLM 4.5 Air | GPT-4 Turbo Preview | |
|---|---|---|
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-4 Turbo Preview 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-4 Turbo Preview by OpenAI can use external tools and APIs, generates structured data. It can handle standard conversations with its 128K token context window. Premium pricing at $10.00/M input and $30.00/M output tokens. Includes built-in content moderation for safer outputs. Released January 25th, 2024.Explore More Comparisons
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Compare GPT-4 Turbo Preview with:
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