LLM API
Z.aiText generationReleased August 26, 2026

GLM-5.3-Flash

GLM-5.3-Flash costs $0.118 per 1M input tokens and $0.472 per 1M output tokens on LLM API, with a 1M-token context window.

Pricing

Lowest price among 3 providers, after discounts.

GLM-5.3-Flash prices on LLM API
Input$0.118per 1M tokens
Output$0.472per 1M tokens
Cache read$0.0236per 1M tokens

Providers

Prices after each provider’s discount; the lowest in bold.

Providers of GLM-5.3-Flash on LLM API
CanopyWave$0.15$0.5$0.031M131K
ComputeBase$0.15$0.5$0.031M131K
Melious$0.118$0.472$0.02361M131K

Features

“Some providers”: not every provider of this model supports it.

  • ToolsYes
  • Parallel tool callsNo
  • Image inputSome providers
  • ReasoningYes

    Levels: low, high, max · default high

  • Prompt cachingYes
  • Structured outputsYes
  • JSON modeYes
  • StreamingYes
  • Web searchYes

Call GLM-5.3-Flash

POST /v1/chat/completionsSet LLMAPI_KEY to your LLM API key.Chat Completions docs

import os

from openai import OpenAI

client = OpenAI(
    base_url="https://api.llmapi.ai/v1",
    api_key=os.environ["LLMAPI_KEY"],
)

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

More from Z.ai

All Z.ai text models

Prices synced .

You've been invited to LLM API

Top up $50 or more and the friend who invited you gets $20 in credits. We pay the $20; your credits stay yours. Referral terms

Sign up