GLM 5.3 FlashX
GLM 5.3 FlashX is a high-speed multimodal model developed by Z.ai, released on September 18, 2026. It is designed to process text, images, and video inputs with native reasoning and tool-calling capabilities.
GLM 5.3 FlashX specs and pricing
- Provider: Z.ai
- Released: September 18, 2026
- Context window: 1M tokens
- Max output: 131K tokens
- Input: text, images, video
- Output: text
- Price: $0.37 input / $1.25 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
What GLM 5.3 FlashX is good at
- Analyzing long-form video content
- Complex reasoning tasks requiring fast inference
- Processing large datasets with multimodal inputs
To-dos to try with GLM 5.3 FlashX
- Analyze this 30-minute video and summarize the key discussion points.
- Read these 500 pages of technical documentation and answer specific troubleshooting questions.
- Use tool-calling to extract data from these images and format it into a structured report.
FAQ
- What types of media can I upload to this model? GLM 5.3 FlashX accepts text, images, and video as input.
- What are the core capabilities of this model? The model supports native multimodal processing, complex reasoning, and tool-calling functions.
- How much does GLM 5.3 FlashX cost? GLM 5.3 FlashX costs $0.37 per million input tokens and $1.25 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 1.21 credits ($1 = 100 credits).
- What is the context window of GLM 5.3 FlashX? GLM 5.3 FlashX can read up to 1M tokens at once and write up to 131K tokens in one reply.
- Can I use GLM 5.3 FlashX without coding? Yes. In todo.is you pick GLM 5.3 FlashX 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.