GLM 5.3

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zai-org/GLM-5.3

Get API key Chat Completions API reference

GLM 5.3 serves text only, under the NVIDIA Open Model Agreement and the GLM-5.3 License.

Pricing

Pay per token

Input / million

USD1.30

Cached input / million

USD0.13

Output / million

USD4.20

Cache hit rate

97.0%last 24 hours

Access

Provider: Z.ai
API compatibility: Chat-compatible, POST /v1/chat/completions
Messages compatibility: Messages-compatible, POST /v1/messages
Accepted input: Text
Availability: Available
Data retention: Read the policy

Capacity

Context window: 1,048,576 tokens
Maximum generated output: 65,536 tokens

Capabilities

Tool calling: Supported
JSON mode: Supported
Streaming: Supported

View full spec

Model ID: glm-5-3
API model ID: zai-org/GLM-5.3
Kind: Chat
Prompt caching: Supported
Reasoning effort: low, high, max

Code examples

# Set RUNINFRA_GATEWAY_KEY to your API key before running this example.
curl -X POST "https://api.runinfra.ai/v1/chat/completions" \
  -H "Authorization: Bearer $RUNINFRA_GATEWAY_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"glm-5-3","messages":[{"role":"user","content":"Hello"}],"max_tokens":16384}'

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