Gemini 3.5 Flash vs GLM 5.3 FlashX
Price, context window & benchmark comparison
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Verdict: GLM 5.3 FlashX is 5.7× cheaper than Gemini 3.5 Flash on a typical 3:1 input/output mix.
| Gemini 3.5 Flash | GLM 5.3 FlashX | |
|---|---|---|
| Input price / 1M | $1.50 | $0.37 |
| Output price / 1M | $9.00 | $1.25 |
| Blended price (3:1) | $3.38 | $0.59 |
| Cached input / 1M | $0.15 | $0.09 |
| Context window | 1M | 1M |
| Max output | 66K | 131K |
| Intelligence index | 32.6 | — |
| Coding index | 70.1 | — |
| Providers | — | 1 |
| Best provider uptime (30m) | — | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-05-19 | 2026-09-18 |
| Retirement | — | — |
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FAQ
Which is cheaper, Gemini 3.5 Flash or GLM 5.3 FlashX?
GLM 5.3 FlashX is 5.7× cheaper than Gemini 3.5 Flash on a typical 3:1 input/output mix.
Gemini 3.5 Flash vs GLM 5.3 FlashX: which has a bigger context window?
Gemini 3.5 Flash: 1,048,576 tokens. GLM 5.3 FlashX: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Gemini 3.5 Flash ≈ $7,500, GLM 5.3 FlashX ≈ $1,365.
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