GLM 5.3 Prime vs GPT-6 Astra

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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GPT-6 Astra

OpenAI
$10.00 / $50.00
Input / Output · per 1M tokens
Compare different models
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Verdict: GLM 5.3 Prime is 4.7× cheaper than GPT-6 Astra on a typical 3:1 input/output mix. GPT-6 Astra has the larger context window (1.1M vs 1M).
GLM 5.3 PrimeGPT-6 Astra
Input price / 1M$2.80$10.00
Output price / 1M$8.80$50.00
Blended price (3:1)$4.30$20.00
Cached input / 1M$0.56$1.00
Context window1M1.1M
Max output131K128K
Intelligence index52.7
Coding index76.9
Providers16
Best provider uptime (30m)100.0%100.0%
Vision inputNoYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-232026-09-04
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FAQ

Which is cheaper, GLM 5.3 Prime or GPT-6 Astra?

GLM 5.3 Prime is 4.7× cheaper than GPT-6 Astra on a typical 3:1 input/output mix.

GLM 5.3 Prime vs GPT-6 Astra: which has a bigger context window?

GLM 5.3 Prime: 1,000,000 tokens. GPT-6 Astra: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 Prime ≈ $10,000, GPT-6 Astra ≈ $45,000.

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