Gemini 3.1 Pro Preview Custom Tools vs GLM 5.3 FlashX

Price, context window & benchmark comparison

Google

$2.00 / $12.00

Input / Output · per 1M tokens

Z.ai (Zhipu)

$0.37 / $1.25

Input / Output · per 1M tokens

Compare different models

Verdict: GLM 5.3 FlashX is 7.6× 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 FlashX
Input price / 1M	$2.00	$0.37
Output price / 1M	$12.00	$1.25
Blended price (3:1)	$4.50	$0.59
Cached input / 1M	$0.20	$0.09
Context window	1M	1M
Max output	66K	131K
Intelligence index	—	—
Coding index	—	—
Providers	—	1
Best provider uptime (30m)	—	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-02-25	2026-09-18
Retirement	—	—

Input tokens / requestOutput tokens / requestRequests / day

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

GLM 5.3 FlashX is 7.6× 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 FlashX: which has a bigger context window?

Gemini 3.1 Pro Preview Custom Tools: 1,048,576 tokens. GLM 5.3 FlashX: 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 FlashX ≈ $1,365.

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