GLM 5.3 Flash
GLM 5.3 Flash is a native multimodal model developed by Z.ai, released in August 2026. It is designed for efficient coding and long-horizon agent tasks, featuring a hybrid architecture that supports large context windows and reasoning capabilities.
GLM 5.3 Flash specs and pricing
- Provider: Z.ai
- Released: August 26, 2026
- Context window: 1M tokens
- Max output: 131K tokens
- Input: text, images, video
- Output: text
- Price: $0.042 input / $0.077 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
What GLM 5.3 Flash is good at
- Analyzing long-form documents or codebases
- Complex tasks requiring reasoning and tool usage
- Multimodal analysis of text, images, and video
To-dos to try with GLM 5.3 Flash
- Analyze a 500-page technical manual to identify specific troubleshooting steps for a hardware issue
- Review a multi-file software repository to suggest refactoring improvements
- Examine a long-duration video file to summarize key events and extract timestamps
FAQ
- What types of media can I upload to GLM 5.3 Flash? This model supports input in the form of text, images, and video.
- What is the primary focus of this model? It is built by Z.ai to handle efficient coding tasks and long-horizon agent workflows using a specialized hybrid attention architecture.
- How much does GLM 5.3 Flash cost? GLM 5.3 Flash costs $0.042 per million input tokens and $0.077 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 0.13 credits ($1 = 100 credits).
- What is the context window of GLM 5.3 Flash? GLM 5.3 Flash can read up to 1M tokens at once and write up to 131K tokens in one reply.
- Can I use GLM 5.3 Flash without coding? Yes. In todo.is you pick GLM 5.3 Flash 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.