StarAPI

glm-4.5 vs glm-5.3-flashx

	glm-4.5	glm-5.3-flashx
Providers	Zhipu AI	Zhipu AI
Input $/M	$0.61	$0.30
Output $/M	$2.42	$1.06
Output multiplier	×4.00	×3.50
Context window	128K tokens	1M tokens
Intelligence index	—	—
Coding index	—	—

What the numbers mean

glm-5.3-flashx is roughly 2.0× cheaper on input than glm-4.5. If your workload passes the quality bar on the cheaper model, that gap compounds across every request; route to glm-4.5 deliberately rather than by default.

Tags: glm-4.5 — Chat, Reasoning, Coding · glm-5.3-flashx — Chat, Reasoning, Coding, Vision

Code

from openai import OpenAI
client = OpenAI(base_url="https://starseaapi.com/v1", api_key="sk-...")

# glm-4.5
client.chat.completions.create(model="glm-4.5", messages=[{"role":"user","content":"Hi"}])

# glm-5.3-flashx
client.chat.completions.create(model="glm-5.3-flashx", messages=[{"role": "user", "content": "Hi"}])

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