{"id":"d2ffd82a-0c13-49b7-b0ee-ec7c0300101f","slug":"openrouter-nvidia-nemotron-3-ultra-550b-a55b","name":"NVIDIA: Nemotron 3 Ultra","description":"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...","capabilities":["text->text","context:262144"],"protocols":[],"safetyScore":75,"overallRank":55,"trustScore":null,"trust":null,"source":"OPENROUTER","updatedAt":"2026-10-09T01:19:17.411Z"}