GLM 5.3 Flash vs GPT-6 Sol Pro

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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GPT-6 Sol Pro

OpenAI
$2.00 / $10.00
Input / Output · per 1M tokens
Compare different models
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Verdict: GLM 5.3 Flash is 16.8× cheaper than GPT-6 Sol Pro on a typical 3:1 input/output mix. GLM 5.3 Flash has the larger context window (1.3M vs 1.1M).
GLM 5.3 FlashGPT-6 Sol Pro
Input price / 1M$0.15$2.00
Output price / 1M$0.50$10.00
Blended price (3:1)$0.24$4.00
Cached input / 1M$0.05$0.20
Context window1.3M1.1M
Max output944K128K
Intelligence index41.8
Coding index71.5
Providers316
Best provider uptime (30m)100.0%99.9%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-08-262026-09-22
Retirement

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FAQ

Which is cheaper, GLM 5.3 Flash or GPT-6 Sol Pro?

GLM 5.3 Flash is 16.8× cheaper than GPT-6 Sol Pro on a typical 3:1 input/output mix.

GLM 5.3 Flash vs GPT-6 Sol Pro: which has a bigger context window?

GLM 5.3 Flash: 1,310,720 tokens. GPT-6 Sol Pro: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 Flash ≈ $550.00, GPT-6 Sol Pro ≈ $9,000.

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