GLM 5.3 Flash vs GLM 5.3 Prime

Price, context window & benchmark comparison

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GLM 5.3 Flash

Z.ai (Zhipu)
$0.15 / $0.50
Input / Output · per 1M tokens
VS
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GLM 5.3 Prime

Z.ai (Zhipu)
$2.80 / $8.80
Input / Output · per 1M tokens
Compare different models
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Verdict: GLM 5.3 Flash is 18.1× cheaper than GLM 5.3 Prime on a typical 3:1 input/output mix. GLM 5.3 Flash has the larger context window (1.3M vs 1M).
GLM 5.3 FlashGLM 5.3 Prime
Input price / 1M$0.15$2.80
Output price / 1M$0.50$8.80
Blended price (3:1)$0.24$4.30
Cached input / 1M$0.05$0.56
Context window1.3M1M
Max output944K131K
Intelligence index41.8
Coding index71.5
Providers311
Best provider uptime (30m)100.0%100.0%
Vision inputYesNo
ReasoningYesYes
Tool callingYesYes
Released2026-08-262026-09-23
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FAQ

Which is cheaper, GLM 5.3 Flash or GLM 5.3 Prime?

GLM 5.3 Flash is 18.1× cheaper than GLM 5.3 Prime on a typical 3:1 input/output mix.

GLM 5.3 Flash vs GLM 5.3 Prime: which has a bigger context window?

GLM 5.3 Flash: 1,310,720 tokens. GLM 5.3 Prime: 1,000,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 Flash ≈ $550.00, GLM 5.3 Prime ≈ $10,000.

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