GLM 5.3 FlashX Legal vs Seed 1.6 Flash

Price, context window & benchmark comparison

GLM 5.3 FlashX Legal

Z.ai (Zhipu)

$0.37 / $1.25

Input / Output · per 1M tokens

Seed 1.6 Flash

ByteDance Seed

$0.075 / $0.30

Input / Output · per 1M tokens

Compare different models

Verdict: Seed 1.6 Flash is 4.5× 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 262K).

	GLM 5.3 FlashX Legal	Seed 1.6 Flash
Input price / 1M	$0.37	$0.075
Output price / 1M	$1.25	$0.30
Blended price (3:1)	$0.59	$0.13
Cached input / 1M	$0.075	—
Context window	1M	262K
Max output	131K	33K
Intelligence index	—	—
Coding index	—	—
Providers	1	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-11-02	2025-12-23
Retirement	—	2026-11-11

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, GLM 5.3 FlashX Legal or Seed 1.6 Flash?

Seed 1.6 Flash is 4.5× cheaper than GLM 5.3 FlashX Legal on a typical 3:1 input/output mix.

GLM 5.3 FlashX Legal vs Seed 1.6 Flash: which has a bigger context window?

GLM 5.3 FlashX Legal: 1,048,576 tokens. Seed 1.6 Flash: 262,144 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 FlashX Legal ≈ $1,365, Seed 1.6 Flash ≈ $300.00.

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