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GLM-5.3 Flash

GLM-5.3 Flash is a 321.32B-parameter language model from Z.ai, suited to chat, reasoning and coding workloads. It runs with a 1M-token context window.

Specifications

Provider
Z.ai
Type
Language model
Category
Text
Parameters
321.32B
Context window
1M tokens
License
mit
API endpoint
/v1/chat/completions
Model ID
GLM-5.3-Flash

About GLM-5.3 Flash

We introduce GLM-5.3-Flash, the first natively multimodal model in the GLM-5 series. With 320B total parameters and just 18B active parameters, it outperforms GLM-5.2 across benchmarks and real-world workloads at one-tenth the price, while approaching Claude Opus 4.8 on coding and agentic benchmarks.

  • transformers
  • safetensors
  • glm5_next
  • image-text-to-text
  • conversational
  • en
  • zh
  • eval-results

Hugging Face · 6,391,126 downloads · 3,150 likes

GLM-5.3 Flash API example

Chat completions through the OpenAI-compatible Denizen Blu One API. Point any OpenAI SDK at api.denizenblu.com/v1, set model to GLM-5.3-Flash and send the request.

curl https://api.denizenblu.com/v1/chat/completions \
  -H "Authorization: Bearer $DENIZEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "GLM-5.3-Flash",
    "messages": [{ "role": "user", "content": "Hello, blue world." }]
  }'

Need keys, streaming or error codes? See the API docs, or try it first in the playground.

Included in every plan

GLM-5.3 Flash is part of the flat-rate catalog, so you never pay per token to use it. Plans differ by usage limits, concurrency and support, not by whether this model is available.

  • Explorer$11 a year
  • Creator$31 a year
  • Professional$51 a year
  • Ultimate$101 a year
  • EnterpriseContact sales

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