Gemini 3.1 Pro Preview Custom Tools vs GLM 5.3 Flash

Price, context window & benchmark comparison

Google

$2.00 / $12.00

Input / Output · per 1M tokens

Z.ai (Zhipu)

$0.0399 / $0.0784

Input / Output · per 1M tokens

Compare different models

Verdict: GLM 5.3 Flash is 90.9× cheaper than Gemini 3.1 Pro Preview Custom Tools on a typical 3:1 input/output mix.

	Gemini 3.1 Pro Preview Custom Tools	GLM 5.3 Flash
Input price / 1M	$2.00	$0.0399
Output price / 1M	$12.00	$0.0784
Blended price (3:1)	$4.50	$0.0495
Cached input / 1M	$0.20	$0.03
Context window	1M	1M
Max output	66K	131K
Intelligence index	—	27.8
Coding index	—	71.5
Providers	—	42
Best provider uptime (30m)	—	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-02-25	2026-08-26
Retirement	—	—

Input tokens / requestOutput tokens / requestRequests / day

Which is cheaper, Gemini 3.1 Pro Preview Custom Tools or GLM 5.3 Flash?

GLM 5.3 Flash is 90.9× cheaper than Gemini 3.1 Pro Preview Custom Tools on a typical 3:1 input/output mix.

Gemini 3.1 Pro Preview Custom Tools vs GLM 5.3 Flash: which has a bigger context window?

Gemini 3.1 Pro Preview Custom Tools: 1,048,576 tokens. GLM 5.3 Flash: 1,048,576 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 3.1 Pro Preview Custom Tools ≈ $10,000, GLM 5.3 Flash ≈ $119.00.

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