Scan to join WeChat groupGLM-5.3
GLM-5.3 for complex software engineering and long-horizon agent tasks
GLM-5.3 supports a 1M-token context window and 128K maximum output with always-on reasoning at low, high or max effort. It is available in GLM Coding Plan, while the model API is not yet generally available.
starsCapabilities
paymentsContext and pricing
descriptionOverview
Overview
GLM-5.3 is Zhipu AI's latest flagship text model, using model ID glm-5.3. It shares the GLM-5.2 base model and improves complex software engineering, terminal work, cybersecurity and long-horizon agents through post-training. Official documentation lists a 1,048,576-token context window and 131,072-token maximum output.
Reasoning
Reasoning is always enabled. thinking.type: disabled is unsupported, while reasoning_effort accepts low, high or max and defaults to max.
Availability
GLM-5.3 is available through GLM Coding Plan. Zhipu states that the model API will launch later, so this wiki records official capabilities without publishing an unannounced API token price.
lightbulbUse cases
- Complex software engineering
- Long-horizon agents and terminal tasks
- Cybersecurity analysis and vulnerability discovery
- Large-context reasoning
thumb_upStrengths
- 1M context and 128K maximum output
- Stronger coding than GLM-5.2
- Low, high and max reasoning effort
- Optimized for long-running agents
infoLimitations
- Model API is not yet generally available
- Reasoning cannot be disabled
- Text input only
- Official API pricing is not yet published