# Llama Nemotron Ultra

> NVIDIA's reasoning model built on Llama 3.1.

- Maker: NVIDIA (https://build.nvidia.com)
- Type: Reasoning, open weights
- Artificial Analysis Intelligence Index: Not scored yet
- Context window: 128K
- Output speed: not listed
- Scores checked 30 October 2026 at https://artificialanalysis.ai/leaderboards/models

## Where to use it through an API

- NVIDIA: model id `nvidia/llama-3.1-nemotron-ultra-253b-v1` (free key available), reasoning

## Use it free

- NVIDIA NIM free API key: how to get one: https://www.multiscreenai.com/free/nvidia-api-key

## Use it with every other AI at once

MultiScreenAI (https://www.multiscreenai.com) puts Llama Nemotron Ultra on one screen next to ChatGPT, Claude, Gemini and 300+ models: one message goes to every panel, and a timed, blind test mode shows which answers best. Pro is free with a follow on X, and you use your own API keys.
AI agents and coding harnesses (Claude Code, Codex, Cursor, Gemini CLI) can ask Llama Nemotron Ultra and other models at once through the MCP server at https://www.multiscreenai.com/api/mcp/ai; setup: https://www.multiscreenai.com/mcp