Data points: 81
The readout for GLM-4.5 and GPT-5.4, before the detailed comparison sheet.
Decision read
GPT-5.4
GPT-5.4 currently has the stronger profile, with verified wins split 0 to 6.
Evidence depth
81 data points
Includes 8 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 18 high-signal samples across speed, scores, and audit health.
Model compare GLM-4.5 vs GPT-5.4glm-4-5-vs-gpt-5-4 | Model A GLM-4.5 | Model B GPT-5.4 |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 0 wins | 6 wins |
| Where it leads | No data | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage, Recent tests |
| Model metadata | GLM-4.5 exposes 131.1K tokens; notable signals: Text input, Text output, Tool calling, JSON mode. | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | No data | OpenAI |
| Context window | 131.1K tokens | 1.1M tokens |
| Max output | 98.3K tokens | 128K tokens |
| Released | Jul 2025 | Mar 2026 |
| Modalities | Input Text Output Text | Input TextImageFile Output Text |
| Features | Text inputText outputTool callingJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | Other | GPT |
| Knowledge cutoff | 2024-12-31 | No data |
| OpenRouter ID | z-ai/glm-4.5 | openai/gpt-5.4 |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | GLM-4.5 | GPT-5.4 |
|---|---|---|
| GPQA | 78.2%#60 | 92.0%#3 |
| SciCode | 34.8%#76 | 56.6%#3 |
| HLE | 12.2%#62 | 41.6%#4 |
| Input price | $0.600/M#23 | $2.50/M#37 |
| Output price | $2.20/M#25 | $15.00/M#44 |
| Time to first token | 1.01 s#36 | 134.24 s#110 |
| Blended price | $1.00/M#38 | $5.63/M#63 |
| Output speed | 49.9 tok/s#89 | 92.4 tok/s#56 |
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GLM-4.5 | GPT-5.4 |
|---|---|---|
| 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 | GPT-5.4 |
|---|---|---|
Mars HK125 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 49 tok/s / 6084ms input / output No data |
Chlink API5 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 50 tok/s / 5476ms input / output No data |
SmokeDivine AI5 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 44 tok/s / 1119ms input / output No data |
WSocket AI5 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 36 tok/s / 12157ms input / output No data |
天絮 API5 tests | GLM-4.5 speed / latency N/A / N/A input / output No data | GPT-5.4 speed / latency 46 tok/s / 3291ms input / output No data |
GLM-4.5 ZhipuAI/GLM-4.5 speed / latency No data input / output $0/M / $0/M | GPT-5.4 GPT-5.4 speed / latency No data input / output $75.00/M / $75.00/M | |
GLM-4.5 glm-4.5 speed / latency No data input / output $0.010/M / $0.010/M | GPT-5.4 gpt-5.4-high speed / latency No data input / output $0.050/M / $0.050/M | |
GLM-4.5 zai-org/GLM-4.5 speed / latency No data input / output $1.03/M / $1.03/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.034/M / $0.205/M | |
GLM-4.5 glm-4.5 speed / latency No data input / output $0.041/M / $0.164/M | GPT-5.4 gpt-5.4-xhigh speed / latency No data input / output $0.103/M / $0.616/M | |
GLM-4.5 glm-4.5 speed / latency No data input / output $0.041/M / $0.151/M | GPT-5.4 gpt-5.4 speed / latency No data input / output $0.171/M / $1.03/M |
This report only uses LMSpeed data for GLM-4.5 and GPT-5.4: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GLM-4.5 | GPT-5.4 |
|---|---|---|
| When to choose each model | GLM-4.5 GLM-4.5 does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.4 leads across 81 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GLM-4.5 vs GPT-5.4 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.
