Google: Gemini 3.5 Flash vs Z.ai: GLM 5.3
google vs z-ai
On price, Z.ai: GLM 5.3 is cheaper (blended cost is about 0.12× that of Google: Gemini 3.5 Flash).
On capability, Google: Gemini 3.5 Flash has the higher intelligence index (33) — better for complex reasoning.
Verdict: pick Z.ai: GLM 5.3 on a budget, or Google: Gemini 3.5 Flash for output quality. Full details below.
Side-by-Side Specs
| Metric | Google: Gemini 3.5 Flash | Z.ai: GLM 5.3 |
|---|---|---|
| Input /1M | $1.50 | $0.07 |
| Output /1M | $9.00 | $1.40 |
| Blended (3:1) | $3.38 | $0.40 |
| Context | 1.0M | 1.0M |
| Intelligence | 33 | 32 |
| Coding | 70 | 75 |
| Math | — | — |
| Speed | 186 tok/s | 74 tok/s |
| CPS Grade | A | A |
FAQ
Which is cheaper, Google: Gemini 3.5 Flash or Z.ai: GLM 5.3?
On price, Z.ai: GLM 5.3 is cheaper (blended cost is about 0.12× that of Google: Gemini 3.5 Flash). Google: Gemini 3.5 Flash: $1.5 in / $9 out; Z.ai: GLM 5.3: $0.0699 in / $1.4 out (per 1M tokens).
Which is smarter, Google: Gemini 3.5 Flash or Z.ai: GLM 5.3?
On capability, Google: Gemini 3.5 Flash has the higher intelligence index (33) — better for complex reasoning. Coding index: Google: Gemini 3.5 Flash 70 vs Z.ai: GLM 5.3 75.
Which one should I choose?
Verdict: pick Z.ai: GLM 5.3 on a budget, or Google: Gemini 3.5 Flash for output quality. Full details below.