GLM 5.3 FlashX Legal vs GPT-3.5 Turbo 16k

Price, context window & benchmark comparison

GLM 5.3 FlashX Legal

Z.ai (Zhipu)

$0.37 / $1.25

Input / Output · per 1M tokens

GPT-3.5 Turbo 16k

OpenAI

$3.00 / $4.00

Input / Output · per 1M tokens

Compare different models

Verdict: GLM 5.3 FlashX Legal is 5.5× cheaper than GPT-3.5 Turbo 16k on a typical 3:1 input/output mix. GLM 5.3 FlashX Legal has the larger context window (1M vs 16K).

	GLM 5.3 FlashX Legal	GPT-3.5 Turbo 16k
Input price / 1M	$0.37	$3.00
Output price / 1M	$1.25	$4.00
Blended price (3:1)	$0.59	$3.25
Cached input / 1M	$0.075	—
Context window	1M	16K
Max output	131K	4K
Intelligence index	—	—
Coding index	—	—
Providers	1	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	No
Reasoning	Yes	No
Tool calling	Yes	Yes
Released	2026-11-02	2023-08-28
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, GLM 5.3 FlashX Legal or GPT-3.5 Turbo 16k?

GLM 5.3 FlashX Legal is 5.5× cheaper than GPT-3.5 Turbo 16k on a typical 3:1 input/output mix.

GLM 5.3 FlashX Legal vs GPT-3.5 Turbo 16k: which has a bigger context window?

GLM 5.3 FlashX Legal: 1,048,576 tokens. GPT-3.5 Turbo 16k: 16,385 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GLM 5.3 FlashX Legal ≈ $1,365, GPT-3.5 Turbo 16k ≈ $8,000.

More comparisons