Using Free OpenRouter Models (Nemotron 3.5) With Coworker

Melvin Vivas · X post · 2026-08-24 · Open on X

Topics: AI Dev Tools & Productivity, LLM Fundamentals · Level: beginner

Summary

Shows Coworker running a free model from OpenRouter, in this case NVIDIA's Nemotron 3.5. It's a way to try agent workflows without paying for API calls.

Key points

• OpenRouter offers free models that work with Coworker.
• The example uses NVIDIA's Nemotron 3.5.
• Free models let you experiment with agents at no cost.

Resources mentioned

• 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
• NVIDIA AI (@NVIDIAAI) on X · person · x.com · free
  NVIDIA AI's official X account, which posts model releases and endpoint availability.
  Also in: AI News Roundup: Claude Fable 5, Scientist AI, ZCode, NVIDIA RL (Melvin Vivas on X · notes), Running AI Locally: Rebuilding AIBackends as a Python Library with Open Models (Melvin Vivas on X · notes), Jensen Huang on NVIDIA's Long-Term Commitment to Open Nemotron Models (Melvin Vivas on X · notes), Qwen3.5 Multimodal Model Now on NVIDIA AI Endpoints (Melvin Vivas on X · notes)
• 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), Free Nemotron 3.5 Lightning on OpenRouter Supports Thinking (Melvin Vivas on X · notes)
• 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

• Choose a free OpenRouter model, such as Nemotron, to experiment with agents at no cost.