Data points: 57
The readout for GLM-4 Flash and GPT-5, before the detailed comparison sheet.
Decision read
GLM-4 Flash
GLM-4 Flash currently has the stronger profile, with verified wins split 4 to 2.
Evidence depth
57 data points
Includes 0 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GLM-4 Flash
The charts below split 9 high-signal samples across speed, scores, and audit health.
Model compare GLM-4 Flash vs GPT-5glm-4-flash-vs-gpt-5 | Model A GLM-4 Flash | Model B GPT-5 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 2 wins |
| Where it leads | Cheapest input price, First-token latency, Free providers, Recent tests |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GLM-4 Flash | GPT-5 |
|---|---|---|
| No shared benchmark metrics are available yet. | ||
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GLM-4 Flash | 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 Flash | GPT-5 |
|---|---|---|
25 tests | GLM-4 Flash speed / latency 78 tok/s / 1573ms input / output No data |
This report only uses LMSpeed data for GLM-4 Flash and GPT-5: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GLM-4 Flash | GPT-5 |
|---|---|---|
| When to choose each model | GLM-4 Flash GLM-4 Flash is stronger when you prioritize Cheapest input price, First-token latency, Free providers, Recent tests. | GPT-5 GPT-5 is stronger when you prioritize Average speed, Provider coverage. |
TL;DR: GLM-4 Flash leads across 57 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GLM-4 Flash vs GPT-5 into nearby model comparisons with enough verified LMSpeed data.
| Average speed, Provider coverage |
| Model metadata | No OpenRouter metadata is available yet for this model. | GPT-5 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | Zhipu AI | OpenAI |
| Context window | No data | 128K tokens |
| Max output | No data | 16.4K tokens |
| Released | No data | Aug 2025 |
| Modalities | No data | Input FileImageText Output Text |
| Features | None listed | Text inputImage inputFile inputText outputStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | No data | GPT |
| Knowledge cutoff | No data | 2024-09-30 |
| OpenRouter ID | No data | openai/gpt-5-chat |
| References | No data | No data |
GPT-5
speed / latency
102 tok/s / 948ms
input / output
No data
V-API20 tests | GLM-4 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 95 tok/s / 1234ms input / output No data |
|---|
6345ywz API5 tests | GLM-4 Flash speed / latency 16 tok/s / 4323ms input / output No data | GPT-5 speed / latency N/A / N/A input / output No data |
|---|
EasyMore5 tests | GLM-4 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 46 tok/s / 6577ms input / output No data |
|---|
星见雅 API5 tests | GLM-4 Flash speed / latency N/A / N/A input / output No data | GPT-5 speed / latency 38 tok/s / 15844ms input / output No data |
|---|
GLM-4 Flash glm-4-flash-250414 speed / latency No data input / output $0/M / $0/M | GPT-5 openai/gpt-5-chat speed / latency No data input / output $75.00/M / $75.00/M |
GLM-4 Flash glm-4-flash speed / latency No data input / output $0/M / $0/M | GPT-5 gpt-5-chat speed / latency No data input / output $0.037/M / $0.300/M |
GLM-4 Flash glm-4-flash speed / latency No data input / output $0/M / $0/M | GPT-5 gpt-5-chat speed / latency No data input / output $0.037/M / $0.300/M |
GLM-4 Flash glm-4-flash speed / latency No data input / output $0/M / $0/M | GPT-5 gpt-5 speed / latency No data input / output $0.036/M / $0.285/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
