GLM 5.3 API: Pricing and Specs

GLM 5.3 API

GLM 5.3 is a large language model by Z.ai, available on the Venice API as z-ai-glm-5-3. Private and end-to-end encrypted variants are available.GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves on GLM-5.2 in coding and in the balance between performance and token efficiency.

GLM 5.3 API pricing

Model ID	Variant	Privacy	Price
`z-ai-glm-5-3`	Standard	Private	$1.75 / $5.50 per 1M
`e2ee-glm-5-3-p`	E2EE	E2EE	$1.75 / $5.50 per 1M

GLM 5.3 specifications

Spec	Value
Provider	Z.ai
Released	Aug 18, 2026
Privacy	Private, E2EE
Status	Stable
Open weights	Yes
Context window	1M tokens
Max output	128K tokens
Reasoning effort	Not adjustable

How to use the GLM 5.3 API

Send requests to POST https://api.venice.ai/api/v1/chat/completions with "model": "z-ai-glm-5-3" and your API key.

curl https://api.venice.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "z-ai-glm-5-3",
    "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }]
  }'

Related models

GLM 5.2 API: $1.40 / $4.40 per 1M
GLM 5.1 API: $1.54 / $4.84 per 1M
GLM 5 API: $1.00 / $3.20 per 1M
GLM 4.7 API: $0.55 / $2.65 per 1M
GLM 4.6 API: $0.43 / $1.75 per 1M
DeepSeek V4 Pro 0813 API: $1.65 / $4.95 per 1M
Muse Spark Open API: $1.56 / $5.31 per 1M
Grok 4.6 API: $2.27 / $6.80 per 1M
Grok 4.7 API: $2.27 / $6.80 per 1M

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GLM 5.3 API