Gemini 2.5 Pro vs GLM-5.3
Both are Flagship-tier models, from Google and Z.ai respectively. GLM-5.3 is the cheaper choice overall at a 4:1 input:output ratio.
Which is cheaper
- Input price: Gemini 2.5 Pro is cheaper ($1.25 vs $1.40).
- Output price: GLM-5.3 is cheaper ($4.40 vs $10.00).
- Blended, 4:1 input:output ratio: GLM-5.3 is 33.3% cheaper ($2.00 vs $3.00 per weighted 1M tokens).
Side by side
| Spec | Gemini 2.5 Pro | GLM-5.3 |
|---|---|---|
| Provider | Z.ai | |
| Tier | Flagship | Flagship |
| Context window | 1.05M | 1M |
| Max output | 66K | 128K |
| Input $/1M | $1.25 | $1.40 |
| Output $/1M | $10.00 | $4.40 |
| Cache read $/1M | $0.125 | $0.26 |
| Modalities | text, image | text |
Gemini 2.5 Pro. Standard tier, <=200k tokens. >200k tier: input $2.50, output $15.00, cache $0.25/1M; cache storage $4.50/1M tokens/hour. Previous-generation flagship, still fully listed (not deprecated) on the current pricing page -- important reference point for price comparisons.
GLM-5.3. Latest flagship text model, per 1M tokens. Context window not stated on pricing page.
Sources
Gemini 2.5 Pro — verified August 29, 2026
GLM-5.3 — verified August 29, 2026
Full Gemini 2.5 Pro pricing page → · Full GLM-5.3 pricing page →