Data points: 82
The readout for GLM-4.5 Air and GPT-5.2, before the detailed comparison sheet.
Decision read
GPT-5.2
GPT-5.2 currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
82 data points
Includes 8 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.2
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare GLM-4.5 Air vs GPT-5.2glm-4-5-air-vs-gpt-5-2 | Model A GLM-4.5 Air | Model B GPT-5.2 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Average speed, Free providers | Cheapest input price, First-token latency, Provider coverage, Recent tests |
| Model metadata | GLM-4.5 Air exposes 131.1K tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. | GPT-5.2 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | Zhipu AI | OpenAI |
| Context window | 131.1K tokens | 128K tokens |
| Max output | 131.1K tokens | 16.4K tokens |
| Released | Jul 2025 | Dec 2025 |
| Modalities | Input Text Output Text | Input FileImageText Output Text |
| Features | Text inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode |
| 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-chat |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GLM-4.5 Air | GPT-5.2 |
|---|---|---|
| LiveCodeBench | 68.4%#33 | 88.9%#4 |
| MMLU-Pro | 81.5%#33 | 87.4%#6 |
| GPQA | 73.3%#74 | 90.3%#9 |
| HLE | 6.8%#79 | 35.4%#9 |
| SciCode | 30.6%#90 | 52.1%#9 |
| Input price | $0.170/M#10 | $1.75/M#35 |
| Output price | $0.980/M#16 | $14.00/M#43 |
| Blended price | $0.372/M#20 | $4.81/M#62 |
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 |
|---|---|---|
N1N15 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 |
OpenRouter10 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 |
素墨API10 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 |
钠 API10 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 |
Rnglg2 API5 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 $0.010/M / $0.010/M | GPT-5.2 gpt-5.2-chat-latest speed / latency No data input / output $75.00/M / $600.00/M | |
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 / $0.959/M | |
GLM-4.5 Air zai-org/GLM-4.5-Air speed / latency No data input / output $0.019/M / $0.118/M | GPT-5.2 gpt-5.2 speed / latency No data input / output $0.034/M / $0.274/M | |
GLM-4.5 Air zai-org/GLM-4.5-Air speed / latency No data input / output $1.03/M / $1.03/M | GPT-5.2 gpt-5.2-medium speed / latency No data input / output $0.024/M / $0.192/M | |
GLM-4.5 Air glm-4.5-air speed / latency No data input / output $0.037/M / $0.037/M | GPT-5.2 gpt-5.2-chat speed / latency No data input / output $0.037/M / $0.300/M |
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.
| Guidance | GLM-4.5 Air | GPT-5.2 |
|---|---|---|
| When to choose each model | GLM-4.5 Air GLM-4.5 Air is stronger when you prioritize Average speed, Free providers. | GPT-5.2 GPT-5.2 is stronger when you prioritize Cheapest input price, First-token latency, Provider coverage, Recent tests. |
TL;DR: GPT-5.2 leads across 82 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GLM-4.5 Air vs GPT-5.2 into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
