GLM 5.3 Flash API: Pricing & Setup

GLM 5.3 Flash pricing

RouterHub token prices · USD per million tokens
Model / exact API ID	Variant	Input	Cached input	Output	Context	Availability
GLM 5.3 Flash `glm-5.3-flash`	standard	$0.1	$0.013453	$0.333333333333	Not published	preview

Prices are USD per million tokens. Cached input uses the cache-read rate when a cache hit is reported.

Compare variants

RouterHub token prices · USD per million tokens
Model / exact API ID	Variant	Input	Cached input	Output	Context	Availability
GLM 5.3 Flash `glm-5.3-flash`	standard	$0.1	$0.013453	$0.333333333333	Not published	preview
GLM 5.3 Flash Uncensored `glm-5.3-flash-uncensored`	uncensored	$0.15	$0.013453	$0.5	Not published	preview
GLM 5.3 Flash Abliterated `glm-5.3-flash-abliterated`	abliterated	$0.3	$0.12	$1	1,048,576 tokens	preview

API compatibility and context

Exact model ID: glm-5.3-flash
Variant: standard
Supported API: OpenAI-compatible Chat Completions
Availability: preview
Context window: Not published
Maximum input: Not published
Maximum output: Not published

Use GLM 5.3 Flash through the API

Create a RouterHub account, add prepaid credits and create an API key. Set ROUTERHUB_API_KEY locally, then send a first request with the exact model ID below.

cURL

curl --connect-timeout 30 --max-time 600 https://routerhub.si/v1/chat/completions \
  -H "Authorization: Bearer $ROUTERHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"glm-5.3-flash","messages":[{"role":"user","content":"Write a short noir scene set in a lighthouse."}],"max_tokens":256}'

Python

Install openai with pip. The examples request 256 output tokens and disable automatic retries. Check Usage after completion or a timeout before resending a paid request.

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["ROUTERHUB_API_KEY"],
    base_url="https://routerhub.si/v1",
    timeout=600.0,
    max_retries=0,
)
response = client.chat.completions.create(
    model="glm-5.3-flash",
    messages=[{"role": "user", "content": "Write a short noir scene set in a lighthouse."}],
    max_tokens=256,
)
print(response.choices[0].message.content)

GLM 5.3 Flash FAQ

What is GLM 5.3 Flash?

GLM 5.3 Flash is a Z.ai language model served through RouterHub using the OpenAI-compatible Chat Completions API.

How much does GLM 5.3 Flash cost?

RouterHub charges $0.1 input / $0.013453 cached / $0.333333333333 output per million tokens. Usage is billed against your prepaid balance.

What is the GLM 5.3 Flash context window?

Context window: Not published. Maximum input: Not published. Maximum output: Not published.

Which API does GLM 5.3 Flash support?

Use OpenAI-compatible Chat Completions with the exact model ID glm-5.3-flash and your RouterHub API key.

Which variants can I compare with GLM 5.3 Flash?

Compare GLM 5.3 Flash with GLM 5.3 Flash Uncensored, GLM 5.3 Flash Abliterated. The comparison table includes their input, cached input, output and context.