Gemini 3.1 Pro Preview vs GLM 5.3 Flash
Price, context window & benchmark comparison
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Verdict: GLM 5.3 Flash is 90.9× cheaper than Gemini 3.1 Pro Preview on a typical 3:1 input/output mix.
| Gemini 3.1 Pro Preview | GLM 5.3 Flash | |
|---|---|---|
| Input price / 1M | $2.00 | $0.0399 |
| Output price / 1M | $12.00 | $0.0784 |
| Blended price (3:1) | $4.50 | $0.0495 |
| Cached input / 1M | $0.20 | $0.03 |
| Context window | 1M | 1M |
| Max output | 66K | 131K |
| Intelligence index | — | 27.8 |
| Coding index | 68.8 | 71.5 |
| Providers | — | 42 |
| Best provider uptime (30m) | — | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-02-19 | 2026-08-26 |
| Retirement | — | — |
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FAQ
Which is cheaper, Gemini 3.1 Pro Preview or GLM 5.3 Flash?
GLM 5.3 Flash is 90.9× cheaper than Gemini 3.1 Pro Preview on a typical 3:1 input/output mix.
Gemini 3.1 Pro Preview vs GLM 5.3 Flash: which has a bigger context window?
Gemini 3.1 Pro Preview: 1,048,576 tokens. GLM 5.3 Flash: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Gemini 3.1 Pro Preview ≈ $10,000, GLM 5.3 Flash ≈ $119.00.
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