MiniMax M2.5: first open-weight model in Notion Custom Agents

Melvin Vivas · X post · 2026-03-02 · Open on X

Topics: AI Agents, Tool Use & MCP, Industry Trends & Job Market, LLM Fundamentals · Level: beginner

Summary

MiniMax M2.5 is now available inside Notion Custom Agents, the first open-weight model offered there. It is tuned for lightweight agent workflows that run often. The creator sees this as a sign that open-weight models are entering products where scale and cost matter most.

Key points

• MiniMax M2.5 is the first open-weight model supported in Notion Custom Agents.
• It is optimized for lightweight agent workflows that run often.
• Open-weight models are being adopted where scale and per-call cost matter most.
• Model choice for agents is a cost/frequency trade-off: cheaper models suit high-volume, simple agent tasks.

Resources mentioned

• MiniMax M2.5 · tool · huggingface.co · free
  An open-weight large language model from MiniMax, optimized for lightweight, high-frequency agent workflows.
• Notion Custom Agents · tool · notion.com · paid
  Notion's feature for building custom AI agents inside Notion workspaces, now with model choice including MiniMax M2.5.