GLM 5.2 Fast vs GLM 5.3 FlashX
Lower and Larger mark one number at a time; they don’t rank the models. How well a model does depends on your task; see Benchmarks for measured results.
| Detail | GLM 5.2 Fastzai/glm-5.2-fast | GLM 5.3 FlashXzai/glm-5.3-flashx |
|---|---|---|
| Maker | zai | zai |
| Kind | Chat | Chat |
| Input per 1M tokens | $2.94 | $0.3885 Lower |
| Cached input per 1M tokens | $0.588 | $0.07875 |
| Cache write per 1M tokens | Same as input | Same as input |
| Output per 1M tokens | $9.24 | $1.3125 Lower |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 128,000 tokens | 131,072 tokens Larger |
| Capabilities | Reasoning, tool use | Reasoning, tool use, vision |
| Takes | Text | Text, image |
| Returns | Text | Text |
| Zero data retention | Yes, on every provider | Not on every provider |
| No training on requests | Yes, on every provider | Not on every provider |
| Released | 2026-06-23 | 2026-09-18 |
Example costs
Example requests, priced at today’s rates with no cached input.
| Example request | GLM 5.2 Fast | GLM 5.3 FlashX |
|---|---|---|
| 1,000 tokens in, 200 out | $0.004788 | $0.000651 |
| 10,000 tokens in, 1,000 out | $0.03864 | $0.005198 |
| 100,000 tokens in, 4,000 out | $0.33096 | $0.0441 |