OpenRouter model
NVIDIA: Nemotron 3 Ultra (free)
NVIDIA Nemotron 3 Ultra is an open frontier-reasoning and orchestration model from NVIDIA, with 55B active parameters out of 550B total (MoE). Built on a hybrid Transformer-Mamba mixture-of-experts architecture, it...
- Provider
- OpenRouter
- Availability
- Available
- Model ID
- nvidia/nemotron-3-ultra-550b-a55b:free
- Snapshot
- 2026-10-07
NVIDIA: Nemotron 3 Ultra (free) model overview
NVIDIA: Nemotron 3 Ultra (free) is listed in the public Swarm catalog through OpenRouter. This page summarizes the verified catalog fields used by Swarm without claiming real-time access for every provider account.
- Provider
- OpenRouter
- Family
- OpenRouter
- Context window
- 1M tokens
- Thinking support
- off · medium · high
- Availability status
- Available
- Catalog ID
- openrouter/nvidia/nemotron-3-ultra-550b-a55b:free
Run NVIDIA: Nemotron 3 Ultra (free) in Swarm
Verified CLI workflow & multi-agent architecture
$
swarm ctl model set --provider openrouter --model openrouter/nvidia/nemotron-3-ultra-550b-a55b:free# Or switch interactively inside the terminal TUI:
>
/modelsSubagent Role Matrix
Assign NVIDIA: Nemotron 3 Ultra (free) to specialized system roles in ~/.swarm/config.json:
- Primary / Planner: Orchestrates full task DAGs and multi-stage pipelines.
- Coder Subagent: Generates code and unit tests inside private Git worktrees.
- Finder Subagent: Performs read-only code search, symbol discovery, and mapping.
Public catalog snapshot. Catalog availability is not a real-time provider status or an access guarantee.