SIDE BY SIDE
GLM 4.5 Air vs GLM 4.7 Flash
Both are GLM models. GLM 4.7 Flash was added to OpenRouter on 2026-01-19, GLM 4.5 Air on 2025-07-25.
| Field | GLM 4.5 Air | GLM 4.7 Flash |
|---|---|---|
| Provider | Z.ai | Z.ai |
| Family | GLM | GLM |
| Province | Silvergrass Fields | Silvergrass Fields |
| Context window | 131K tokens | 200K tokens |
| Maximum output | 98K tokens | 118K tokens |
| Input / 1M tokens | $0.130 | $0.060 |
| Output / 1M tokens | $0.850 | $0.400 |
| Accepts | text | text |
| Produces | text | text |
| Reasoning | Yes | Yes |
| Tool use | Yes | Yes |
| Added to OpenRouter | 2025-07-25 | 2026-01-19 |
| Model ID | z-ai/glm-4.5-air | z-ai/glm-4.7-flash |
Questions and answers
Which is cheaper, GLM 4.5 Air or GLM 4.7 Flash?
GLM 4.7 Flash costs less for both input ($0.060 vs $0.130) and output ($0.400 vs $0.850) per million tokens. On input, GLM 4.7 Flash is 54% cheaper.
Which has the larger context window?
GLM 4.7 Flash: 200K tokens against 131K for GLM 4.5 Air (1.5× as long).
What can one do that the other cannot?
Nothing among reasoning, tool use and image input: both support reasoning and tool use.
Answers are computed from the 2026-10-24 catalog snapshot.