GLM 5.3 Prime vs o3 Mini High

Price, context window & benchmark comparison

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GLM 5.3 Prime

Z.ai (Zhipu)
$2.80 / $8.80
Input / Output · per 1M tokens
VS
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o3 Mini High

OpenAI
$1.10 / $4.40
Input / Output · per 1M tokens
Compare different models
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Verdict: o3 Mini High is 2.2× cheaper than GLM 5.3 Prime on a typical 3:1 input/output mix. GLM 5.3 Prime has the larger context window (1M vs 200K).
GLM 5.3 Primeo3 Mini High
Input price / 1M$2.80$1.10
Output price / 1M$8.80$4.40
Blended price (3:1)$4.30$1.93
Cached input / 1M$0.56$0.55
Context window1M200K
Max output131K100K
Intelligence index11
Coding index16.3
Providers1
Best provider uptime (30m)100.0%
Vision inputNoNo
ReasoningYesYes
Tool callingYesYes
Released2026-09-232025-02-12
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FAQ

Which is cheaper, GLM 5.3 Prime or o3 Mini High?

o3 Mini High is 2.2× cheaper than GLM 5.3 Prime on a typical 3:1 input/output mix.

GLM 5.3 Prime vs o3 Mini High: which has a bigger context window?

GLM 5.3 Prime: 1,000,000 tokens. o3 Mini High: 200,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 Prime ≈ $10,000, o3 Mini High ≈ $4,400.

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