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GLM 5.3
zai-org/glm-5-3
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GLM 5.3 is the flagship reasoning model from Z.ai, featuring deep multimodal comprehension, verifiable step-by-step logic, and complex multi-step tool execution.
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Pricing
USD, pay per token$1.30
per 1M input tokens$0.13
per 1M cached input tokens$4.20
per 1M output tokens+
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Measured performance
Output speed
185.0
output tok/s, model onlyTime to first token
650
milliseconds to first reasoning tokenCache hit rate
28.1%last 24 hours
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Access
Confirm how your client reaches this model.
Provider
Z.ai
API compatibility
Mission-compatible Outcome Intents
Anthropic compatibility
Anthropic-compatible Messages, POST /v1/messages
Accepted input
Text, images, and sensory streams
Availability
Available
Data retention
Your state and execution memory are never stored or used for external model training.
Capacity
Check the limits your workload must fit.
Context window
1,048,576 tokens
Maximum request size
3.5 MB per request
Maximum generated output
1,048,576 tokens
Capabilities
See which request modes the API supports.
Tool calling
Supported
JSON mode
Supported
Streaming
Supported
Precision
FP8, vendor-native release
View Full Spec
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Code examples
Set HOROS_GATEWAY_KEY to your workspace API key before using an example.
CLIENT_REQUEST_ID="$(uuidgen)"
curl -X POST "https://api.horos.com/v1/chat/completions" \
-H "Authorization: Bearer $HOROS_GATEWAY_KEY" \
-H "X-Client-Request-Id: $CLIENT_REQUEST_ID" \
-H "Content-Type: application/json" \
-d '{"model":"glm-5-3","messages":[{"role":"user","content":"Hello"}],"max_tokens":2048}'+
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Trust and provenance
Verify the company and operating credentials behind this capability.
HOROS is a product of System Integration.