Data points: 83
Model compare
The readout for GLM-4.5 and GPT-5, before the detailed comparison sheet.
Weighted outcome: GLM-4.5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GLM-4.5
GLM-4.5 has the higher weighted result; Model A / B score 53.3 to 46.7.
Evidence depth
83 data points
Includes 8 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GLM-4.5
The charts below split 17 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 and GPT-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GLM-4.5 | GPT-5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 53.3 pts | 46.7 pts |
| Benchmark category leads | 2 categories | 1 categories |
| Operational advantages | No data | Cheapest input price, Average speed, 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 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 | GPT-5 |
|---|---|---|
| Developer | Z.ai | OpenAI |
| Released | Jul 2025 | Aug 2025 |
| Parameters | No data | No data |
| Tokenizer | Other | GPT |
| Knowledge cutoff | 2024-12-31 | 2024-09-30 |
| OpenRouter ID | z-ai/glm-4.5 | openai/gpt-5 |
| References | No data | No data |
This report only uses LMSpeed data for GLM-4.5 and GPT-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GLM-4.5
GLM-4.5 leads these benchmark categories: Coding, Reasoning.
GPT-5
GPT-5 is stronger in benchmark categories (Math) and operational dimensions (Cheapest input price, Average speed, 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
55.1
Avg. score
GPT-5
51.9
GPT-5
GLM-4.5 leads by 2.4
GLM-4.5 leads by 1.1
GPT-5
GPT-5 leads by 0.9
No data
No data
GPT-5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GLM-4.5
winner83.5%
Rank #38/125 · confidence 4
GPT-5
80.6%
Rank #57/125 · confidence 4
GLM-4.5
winner78.2%
Rank #82/188 · confidence 4
GPT-5
67.3%
Rank #121/188 · confidence 4
GLM-4.5
winner12.2%
Rank #86/187 · confidence 4
GPT-5
5.4%
Rank #132/187 · confidence 4
GLM-4.5
winner73.8%
Rank #24/115 · confidence 4
GPT-5
55.8%
Rank #49/115 · confidence 4
GLM-4.5
34.8%
Rank #113/185 · confidence 4
GPT-5
winner38.8%
Rank #83/185 · confidence 4
GLM-4.5
winner87.3%
Rank #6/68 · confidence 4
GPT-5
36.7%
Rank #35/68 · confidence 4
GLM-4.5
winner97.9%
Rank #9/74 · confidence 4
GPT-5
86.1%
Rank #42/74 · confidence 4
GLM-4.5
1200.0
Rank #44/66 · confidence 1 · eval date 2025-06-01
GPT-5
winner1214.0
Rank #40/66 · confidence 1 · eval date 2025-08-07
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GLM-4.5 | GPT-5 |
|---|---|---|
| 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 | GPT-5 |
|---|---|---|
20 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data |
5 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data |
5 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 102 tok/s / 948ms input / output No data |
5 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 58 tok/s / 17419ms input / output No data |
0 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
GLM-4.5 glm-4.5 speed / latency No data input / output $0.033/M/$0.121/M | GPT-5 gpt-5 speed / latency No data input / output $0/M | |
GLM-4.5 glm-4.5 speed / latency No data input / output $0.041/M/$0.151/M | GPT-5 gpt-5 speed / latency No data input / output $0.086/M | |
GLM-4.5 glm-4.5 speed / latency No data input / output $0/request | GPT-5 gpt-5-chat-latest speed / latency No data input / output $0/request | |
GLM-4.5 glm-4.5 speed / latency No data input / output $0.066/M/$0.263/M | GPT-5 gpt-5-chat-latest speed / latency No data input / output $0.856/M |
Weighted outcome: GLM-4.5. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Output
| Features | Text inputText outputTool callingJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
