{"id":"7bca2a2d-dcdd-44c0-8f39-c38d73345b53","slug":"openrouter-nvidia-nemotron-3-ultra-550b-a55b-free","name":"NVIDIA: Nemotron 3 Ultra (free)","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:1000000"],"protocols":[],"safetyScore":75,"overallRank":55,"trustScore":null,"trust":null,"source":"OPENROUTER","updatedAt":"2026-10-09T01:19:17.416Z"}