Koala vs. Nemotron

Overview

Released alongside Vicuna, Koala is one of many descendants of the Meta LLaMA model trained on dialogue data collected from the web. On the developers' benchmarks, Koala outperforms its sibling Alpaca, though its adoption has been significantly less than that of its other sibling, Vicuna. Due to its use of LLaMA, only research use is permitted.

Initial release: 2023-04-03

Reference

https://bair.berkeley.edu/blog/2023/04/03/koala/

Further Reading

Overview

Nemotron is NVIDIA's open model family for efficient reasoning, coding, long-context analysis, and agent orchestration. Nemotron 3 Ultra is the current flagship.

NVIDIA introduced the Nemotron 3 family in December 2025 with Nano, Super, and Ultra tiers. Nemotron 3 Ultra, released in June 2026, is a 550B-parameter hybrid Mamba-Transformer mixture-of-experts model with 55B active parameters and a one-million-token context window. It is optimized for long-running agent workflows, tool use, code, multilingual reasoning, and high-stakes retrieval. NVIDIA publishes the weights, training data, recipes, and fine-tuning workflows under the OpenMDW-1.1 license.

Initial release: 2025-12-15

Current generation: Nemotron 3 Ultra

Reference

https://build.nvidia.com/nvidia/nemotron-3-ultra-550b-a55b/modelcard

Further Reading

• https://research.nvidia.com/labs/nemotron/Nemotron-3/
• https://developer.nvidia.com/blog/nvidia-nemotron-3-ultra-powers-faster-more-efficient-reasoning-for-long-running-agents/
• https://build.nvidia.com/nvidia/nemotron-3-ultra-550b-a55b/modelcard