GLM 5.3 Prime
GLM 5.3 Prime is a high-speed text model developed by Z.ai that focuses on accelerated output throughput. It features a 1-million-token context window and includes built-in reasoning and tool-calling capabilities.
GLM 5.3 Prime specs and pricing
- Provider: Z.ai
- Released: September 23, 2026
- Context window: 1M tokens
- Max output: 131K tokens
- Input: text
- Output: text
- Price: $2.80 input / $8.80 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
What GLM 5.3 Prime is good at
- Processing large volumes of text data
- Complex tasks requiring multi-step reasoning
- Automated workflows that rely on tool-calling
To-dos to try with GLM 5.3 Prime
- Analyze a 500,000-token document to identify recurring themes
- Use tool-calling to execute a series of data retrieval tasks based on a provided text prompt
- Draft a detailed report based on a long transcript while applying logical reasoning to the findings
FAQ
- What is the primary focus of GLM 5.3 Prime? This model is designed as a high-speed variant of the GLM-5.3 series, specifically optimized to deliver faster output throughput.
- Does this model support non-text inputs? No, GLM 5.3 Prime is limited to text input and text output.
- How much does GLM 5.3 Prime cost? GLM 5.3 Prime costs $2.80 per million input tokens and $8.80 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 9.07 credits ($1 = 100 credits).
- What is the context window of GLM 5.3 Prime? GLM 5.3 Prime can read up to 1M tokens at once and write up to 131K tokens in one reply.
- Can I use GLM 5.3 Prime without coding? Yes. In todo.is you pick GLM 5.3 Prime as your agent's model and write to-dos in plain words, on the web, the Android app, WhatsApp or Telegram. No API key needed: credits are included, or you can bring your own key.
JavaScript is required to use the todo.is app.