GLM-5.3-Flash API

CN Zhipu GLM | released 2026-10

GLM-5.3-Flash is the first natively multimodal model in the GLM-5 series, using a 320B-total / 18B-active sparse architecture to beat GLM-5.2 quality at flash-tier cost. Excellent price-performance for chat, vision input and high-volume production traffic with a million-token context.

visionFastTool Use

Pricing (official list, per 1M tokens)

Input

$0.12/M

Output

$0.42/M

Specifications

Context window1000K tokens Input modalitiesText StreamingYes APIOpenAI-compatible

How to use GLM-5.3-Flash

Drop-in OpenAI replacement. Change only the base_url and model.

# Python -pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://meshtok.com/v1",
    api_key="sk-your-MeshTok-key",
)

resp = client.chat.completions.create(
    model="bigmodel/glm-5.3-flash",
    messages=[{"role":"user","content":"Hello!"}],
)
print(resp.choices[0].message.content)

# cURL
curl https://meshtok.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-MeshTok-key" \
  -H "Content-Type: application/json" \
  -d '{"model":"bigmodel/glm-5.3-flash","messages":[{"role":"user","content":"Hello!"}]}'