Data points: 73
Model compare
The readout for GLM-4.5 Air and GPT-4, before the detailed comparison sheet.
Weighted outcome: GPT-4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-4
GPT-4 has the higher weighted result; Model A / B score 12 to 88.
Evidence depth
73 data points
Includes 3 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GPT-4
The charts below split 12 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for GLM-4.5 Air and GPT-4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GLM-4.5 Air | GPT-4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 12.0 pts | 88.0 pts |
| Benchmark category leads | 0 categories | 1 categories |
| Operational advantages | Cheapest input price, Average speed, Provider coverage | First-token latency, Free providers |
| Context window | 131.1K tokens | 8.2K tokens |
| Max output | 98.3K tokens | 4.1K tokens |
| Modalities | Input Text Output Text | Input Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | GLM-4.5 Air | GPT-4 |
|---|---|---|
| Developer | Z.ai | OpenAI |
| Released | Jul 2025 | May 2023 |
| Parameters | No data | No data |
| Tokenizer | Other | GPT |
| Knowledge cutoff | 2024-12-31 | 2021-09-30 |
| OpenRouter ID | z-ai/glm-4.5-air | openai/gpt-4 |
| References | No data | No data |
This report only uses LMSpeed data for GLM-4.5 Air and GPT-4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GLM-4.5 Air
GLM-4.5 Air has these operational advantages: Cheapest input price, Average speed, Provider coverage.
GPT-4
GPT-4 is stronger in benchmark categories (Coding) and operational dimensions (First-token latency, Free providers).
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
GLM-4.5 Air
45.9
Avg. score
GPT-4
49.5
GLM-4.5 Air
GPT-4 leads by 1.1
GLM-4.5 Air
GLM-4.5 Air
GLM-4.5 Air
No data
No data
GLM-4.5 Air
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GLM-4.5 Air
winner$0.170/M
Rank #23/162 · confidence 4
GPT-4
$30.00/M
Rank #160/162 · confidence 4
GLM-4.5 Air
winner$0.372/M
Rank #31/162 · confidence 4
GPT-4
$37.50/M
Rank #160/162 · confidence 4
GLM-4.5 Air
winner$0.980/M
Rank #39/162 · confidence 4
GPT-4
$60.00/M
Rank #155/162 · confidence 4
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GLM-4.5 Air | GPT-4 |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GLM-4.5 Air | GPT-4 |
|---|---|---|
10 tests | GLM-4.5 Air speed / latency 20 tok/s / 33054ms input / output No data | GPT-4 speed / latency N/A / N/A input / output No data |
0 tests | GLM-4.5 Air speed / latency N/A / N/A input / output No data | GPT-4 speed / latency N/A / N/A input / output No data |
0 tests | GLM-4.5 Air speed / latency N/A / N/A input / output No data | GPT-4 speed / latency N/A / N/A input / output No data |
0 tests | GLM-4.5 Air speed / latency N/A / N/A input / output No data | GPT-4 speed / latency N/A / N/A input / output No data |
0 tests | GLM-4.5 Air speed / latency N/A / N/A input / output No data | GPT-4 speed / latency N/A / N/A input / output No data |
GLM-4.5 Air glm-4.5-air speed / latency No data input / output $0.014/M/$0.075/M | GPT-4 gpt-4 speed / latency No data input / output $2.05/M | |
GLM-4.5 Air glm-4.5-air speed / latency No data input / output $0/request | GPT-4 gpt-4-32k-0613 speed / latency No data input / output $0/request | |
GLM-4.5 Air zai-org/GLM-4.5-Air speed / latency No data input / output $0.025/M/$0.140/M | GPT-4 gpt-4-0613 speed / latency No data input / output $51.40/M | |
GLM-4.5 Air glm-4.5-air speed / latency No data input / output $0.033/M/$0.247/M | GPT-4 gpt-4-0613 speed / latency No data input / output $20.55/M |
Weighted outcome: GPT-4. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputText outputTool callingReasoning | Text inputText outputTool callingStructured outputsJSON mode |
|---|
