Gemini 3.5 Flash vs GLM-4.5
Both are Mid-tier models, from Google and Z.ai respectively. GLM-4.5 is the cheaper choice overall at a 4:1 input:output ratio.
Which is cheaper
Side by side
| Spec | Gemini 3.5 Flash | GLM-4.5 |
|---|---|---|
| Provider | Z.ai | |
| Tier | Mid | Mid |
| Context window | 1.05M | 128K |
| Max output | 66K | 96K |
| Input $/1M | $1.50 | $0.60 |
| Output $/1M | $9.00 | $2.20 |
| Cache read $/1M | $0.15 | $0.11 |
| Modalities | text, image | text |
Gemini 3.5 Flash. Standard tier, not introductory pricing. Cached context is billed for storage at $1 per 1M tokens per hour.
GLM-4.5. Popular open-weight GLM generation, per 1M tokens.
Sources
Gemini 3.5 Flash — verified August 29, 2026
GLM-4.5 — verified August 29, 2026
Full Gemini 3.5 Flash pricing page → · Full GLM-4.5 pricing page →