Free Nemotron 3.5 Lightning on OpenRouter Supports Thinking

Melvin Vivas · X post · 2026-08-29 · Open on X

Topics: LLM Fundamentals, AI Agents, Tool Use & MCP · Level: beginner

Summary

Nemotron 3.5 Lightning is available for free on OpenRouter and supports thinking (reasoning) mode. It also works in the creator's Coworker app.

Key points

• Nemotron 3.5 Lightning is offered as a free model on OpenRouter.
• The model supports thinking (reasoning) mode.
• You can use it as the agent model inside Coworker.

Resources mentioned

• NVIDIA Nemotron 3.5 · tool · openrouter.ai · free
  NVIDIA Nemotron model with thinking support, available free on OpenRouter.
  Also in: Coworker: Free Desktop AI Agent App with Cloud or Local Models (Melvin Vivas on X · notes), Using Free OpenRouter Models (Nemotron 3.5) With Coworker (Melvin Vivas on X · notes)
• OpenRouter · tool · openrouter.ai · free
  A single OpenAI-compatible API that routes requests to hundreds of models from many providers, with one bill and model fallbacks.
  Also in: Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), The Jev model is now on OpenRouter (Melvin Vivas on X · notes), Kev-4B model, an alternative to Jev, now available on OpenRouter (Melvin Vivas on X · notes), Space Bunny Alpha: stealth 1M-context flash model on OpenRouter (Melvin Vivas on X · notes) and 42 more
• Coworker (donvito/coworker) · repo · github.com · free
  The creator's local-first desktop app where you pick an AI coworker and have it produce work such as invoices as finished PDFs.
  Also in: Claude Opus 5.5 for Video Making: Creator's Showcase Thread (Coworker) (Melvin Vivas on X · notes), Coworker: free open-source desktop AI coworker app (Melvin Vivas on X · notes), Coworker: Open-Source Desktop App for AI Agents (Melvin Vivas on X · notes), Using Devin AI to Test the Coworker Desktop App on Windows (Melvin Vivas on X · notes) and 38 more

Try this

• Try the free Nemotron 3.5 Lightning model with thinking on OpenRouter.