Data points: 102
Model compare
The readout for GLM-4.5 Air and GPT-5.2, before the detailed comparison sheet.
Weighted outcome: GPT-5.2. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.2
GPT-5.2 has the higher weighted result; Model A / B score 17.3 to 82.7.
Evidence depth
102 data points
Includes 18 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5.2
The charts below split 27 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-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GLM-4.5 Air | GPT-5.2 |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 17.3 pts | 82.7 pts |
| Benchmark category leads | 1 categories | 5 categories |
| Operational advantages | Average speed | Cheapest input price, First-token latency, Free providers, Provider coverage |
| Context window | 131.1K tokens | 400K tokens |
| Max output | 98.3K tokens | 128K tokens |
| Modalities | Input Text Output Text | Input File |
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-5.2 |
|---|---|---|
| Developer | Z.ai | OpenAI |
| Released | Jul 2025 | Dec 2025 |
| Parameters | No data | No data |
| Tokenizer | Other | GPT |
| Knowledge cutoff | 2024-12-31 | No data |
| OpenRouter ID | z-ai/glm-4.5-air | openai/gpt-5.2 |
| References | No data | No data |
This report only uses LMSpeed data for GLM-4.5 Air and GPT-5.2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GLM-4.5 Air
GLM-4.5 Air is stronger in benchmark categories (Math) and operational dimensions (Average speed).
GPT-5.2
GPT-5.2 is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Instruction following) and operational dimensions (Cheapest input price, First-token latency, Free providers, Provider coverage).
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-5.2
52.8
GPT-5.2 leads by 5.2
GPT-5.2 leads by 8.2
GPT-5.2 leads by 7.0
GPT-5.2 leads by 20.2
GLM-4.5 Air leads by 1.1
No data
GPT-5.2
GPT-5.2 leads by 12.3
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-5.2
$1.75/M
Rank #120/162 · confidence 4
GLM-4.5 Air
winner$0.372/M
Rank #31/162 · confidence 4
GPT-5.2
$4.81/M
Rank #132/162 · confidence 4
GLM-4.5 Air
winner$0.980/M
Rank #39/162 · confidence 4
GPT-5.2
$14.00/M
Rank #133/162 · confidence 4
GLM-4.5 Air
43.7
Rank #74/89 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner72.7
Rank #13/89 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
winner81.5%
Rank #53/125 · confidence 4
GPT-5.2
81.4%
Rank #54/125 · confidence 4
GLM-4.5 Air
winner73.3%
Rank #106/188 · confidence 4
GPT-5.2
71.2%
Rank #110/188 · confidence 4
GLM-4.5 Air
6.8%
Rank #116/187 · confidence 4
GPT-5.2
winner7.3%
Rank #109/187 · confidence 4
GLM-4.5 Air
30.6
Rank #85/96 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner52.1
Rank #18/96 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
winner68.4%
Rank #32/115 · confidence 4
GPT-5.2
66.9%
Rank #36/115 · confidence 4
GLM-4.5 Air
30.6%
Rank #136/185 · confidence 4
GPT-5.2
winner40.4%
Rank #64/185 · confidence 4
GLM-4.5 Air
winner92.3
Rank #7/90 · confidence 1 · eval date 2025-06-01
GPT-5.2
79.7
Rank #39/90 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
15.5
Rank #82/90 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner43.8
Rank #16/90 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
73.3
Rank #74/96 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner90.3
Rank #19/96 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
6.8
Rank #75/96 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner35.4
Rank #21/96 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
16.5
Rank #80/99 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner42.2
Rank #22/99 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
1176.0
Rank #48/66 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner1224.0
Rank #37/66 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
37.6
Rank #77/86 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner75.4
Rank #21/86 · confidence 3 · eval date 2025-12-11
GLM-4.5 Air
46.5
Rank #69/84 · confidence 1 · eval date 2025-06-01
GPT-5.2
winner84.8
Rank #44/84 · confidence 3 · eval date 2025-12-11
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GLM-4.5 Air | GPT-5.2 |
|---|---|---|
| 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-5.2 |
|---|---|---|
15 tests | GLM-4.5 Air speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 56 tok/s / 1798ms input / output No data |
10 tests | GLM-4.5 Air speed / latency 20 tok/s / 33054ms input / output No data | GPT-5.2 speed / latency N/A / N/A input / output No data |
10 tests | GLM-4.5 Air speed / latency 27 tok/s / 39365ms input / output No data | GPT-5.2 speed / latency N/A / N/A input / output No data |
10 tests | GLM-4.5 Air speed / latency 69 tok/s / 775ms input / output No data | GPT-5.2 speed / latency 60 tok/s / 3331ms input / output No data |
5 tests | GLM-4.5 Air speed / latency N/A / N/A input / output No data | GPT-5.2 speed / latency 55 tok/s / 1434ms 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-5.2 gpt-5.2 speed / latency No data input / output $0.120/M | |
GLM-4.5 Air glm-4.5-air speed / latency No data input / output $0/request | GPT-5.2 gpt-5.2 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-5.2 gpt-5.2-chat-latest speed / latency No data input / output $3.00/M | |
GLM-4.5 Air glm-4.5-air speed / latency No data input / output $0.033/M/$0.247/M | GPT-5.2 gpt-5.2-chat-latest speed / latency No data input / output $1.20/M |
Weighted outcome: GPT-5.2. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputText outputTool callingReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
