GLM-4.5 vs GPT-5 High: Specs & Benchmark Comparison
| Characteristic | GLM-4.5 | GPT-5 High |
|---|---|---|
| Company | Zhipu AI | OpenAI |
| Release Date | July 27, 2025 | August 6, 2025 |
| Parameters | 355B | — |
| Multimodal | No | Yes |
| Context (input) | 131K | 400K |
| Context (output) | 98K | 128K |
| Input Price / 1M | $0.60 | $2.00 |
| Output Price / 1M | $2.20 | $8.00 |
| Average Score | 0.8 | 0.9 |
| Benchmarks | ||
| GPQA | 0.8 | 0.9 |
Visual Benchmark Comparison
GLM-4.5
GPT-5 High
GPQA0.8 vs 0.9
0.8
0.9
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: GLM-4.5 — 0.8, GPT-5 High — 0.9.
API Cost
GLM-4.5 is 3.6x cheaper: input $0.60/1M vs $2.00/1M tokens.
Context Window
GPT-5 High supports a larger context: 400K vs 131K tokens.
Recency
Both models were released around the same time: 7/27/2025 and 8/6/2025.
More About These Models
Related Comparisons
The GLM-4.5 and GPT-5 High comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GLM-4.5 or GPT-5 High page. See also the complete list of AI model comparisons.