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glm-5.3 API pricing & access
glm-5.3 API pricing: $1.4 per 1M tokens. glm-5.3. Supports text input and text output. Listed specifications follow public vendor d…
glm-5.3 API access
glm-5.3. Supports text input and text output. Listed specifications follow public vendor documentation. Available features and limits depend on the selected serving channel.
Compare supported API endpoints and capabilities, then access glm-5.3 through the unified API gateway.
- Category
- text
- Context length
- 1000000 tokens
- Maximum output
- 128000 tokens
- Supported APIs
- OpenAI Chat Completions API, Anthropic Messages API
- API endpoints
- POST /v1/chat/completions, POST /v1/messages
- Input modalities
- text
- Output modalities
- text
- Capabilities
- reasoning, streaming, function calling, caching, structured output
glm-5.3 API pricing
- Base input price
- $1.4 per 1M tokens
- Base output price
- $4.4 per 1M tokens
Base prices are shown in USD before group-specific adjustments. Open the live pricing page for current access-group prices.
About glm-5.3
GLM-5.3 is Z.ai’s text-generation model, with official documentation emphasizing complex coding and long-horizon tasks. Evaluate it for cross-file code understanding, changes to existing projects and text workflows that must retain goals and constraints.
This catalog entry is separate from GLM-5.3-Flash. Do not apply Flash’s multimodal capabilities to this text-oriented entry. Verify tools, reasoning settings and output limits for the selected route and protocol.
Official reference, checked 2026-10-14.
Use cases and prompting
- Define change boundaries, existing behavior and acceptance criteria before providing relevant files or a reproduction.
- Preserve intermediate results in long workflows and distinguish proposed steps from executed steps.
- Validate tool arguments and results in your application, with explicit stopping conditions.
- For visual tasks, compare GLM-5.3-Flash. See the API documentation for text integration.
How to call glm-5.3
glm-5.3 is served through tbuy's unified gateway. Existing OpenAI or Anthropic SDK code keeps working: point base_url at https://modelsok.com and use your tbuy API key.
curl (OpenAI-compatible)
curl https://modelsok.com/v1/chat/completions \
-H "Authorization: Bearer $API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "glm-5.3", "messages": [{"role": "user", "content": "Hello"}]}'Python (openai SDK)
from openai import OpenAI
client = OpenAI(base_url="https://modelsok.com/v1", api_key="YOUR_API_KEY")
response = client.chat.completions.create(
model="glm-5.3",
messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)Python (anthropic SDK)
from anthropic import Anthropic
client = Anthropic(base_url="https://modelsok.com", api_key="YOUR_API_KEY")
message = client.messages.create(
model="glm-5.3",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}],
)
print(message.content[0].text)Related pages
Frequently asked questions about glm-5.3
What is glm-5.3?
glm-5.3. Supports text input and text output. Listed specifications follow public vendor documentation. Available features and limits depend on the selected serving channel.
How do I call glm-5.3?
Create an API key with access to glm-5.3, then use the exact model ID and a supported endpoint from the API access section. Request fields depend on the selected endpoint.
How is glm-5.3 priced?
Pricing depends on the selected provider group and the model billing unit. Refer to the current input, output, request, or media prices in the pricing section.
What is the context window of glm-5.3?
The model catalog lists a context window of 1000000 tokens. Check the selected endpoint for request limits.
What is the maximum output of glm-5.3?
The model catalog lists a maximum output of 128000 tokens. Your request settings may set a lower limit.
How should I evaluate glm-5.3 for my project?
Start with the use cases and prompting guidance on this page, then evaluate the model with representative inputs from your project.