GLM 5.3 FlashX Legal vs Solar Pro 4

Price, context window & benchmark comparison

GLM 5.3 FlashX Legal

Z.ai (Zhipu)

$0.37 / $1.25

Input / Output · per 1M tokens

Solar Pro 4

Upstage

$0.15 / $0.60

Input / Output · per 1M tokens

Compare different models

Verdict: Solar Pro 4 is 2.2× cheaper than GLM 5.3 FlashX Legal on a typical 3:1 input/output mix. GLM 5.3 FlashX Legal has the larger context window (1M vs 524K).

	GLM 5.3 FlashX Legal	Solar Pro 4
Input price / 1M	$0.37	$0.15
Output price / 1M	$1.25	$0.60
Blended price (3:1)	$0.59	$0.26
Cached input / 1M	$0.075	$0.03
Context window	1M	524K
Max output	131K	131K
Intelligence index	—	28.2
Coding index	—	52.7
Providers	1	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	No
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-11-02	2026-08-10
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, GLM 5.3 FlashX Legal or Solar Pro 4?

Solar Pro 4 is 2.2× cheaper than GLM 5.3 FlashX Legal on a typical 3:1 input/output mix.

GLM 5.3 FlashX Legal vs Solar Pro 4: which has a bigger context window?

GLM 5.3 FlashX Legal: 1,048,576 tokens. Solar Pro 4: 524,288 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 FlashX Legal ≈ $1,365, Solar Pro 4 ≈ $600.00.

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