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...
15 providers
Model catalog
Models
Every model in the catalog with source-linked pricing, context limits, provider availability, and published benchmark results.
xAI's default Grok for chat, coding, agentic tools, and lower hallucination risk
28 providers
| Model | Creator | Score | Inputs | Context | Input | Output | Released | Compare |
|---|---|---|---|---|---|---|---|---|
| NVIDIA: Nemotron 3 Ultranvidia/nemotron-3-ultra-550b-a55b | NVIDIA |
81.7 | 256K | $0.625 | $3.125 | 2026-06-04 | ||
| Grok 4.3xai/grok-4.3 | xAI |
81.0 | 1M | $1.25 | $2.5 | 2026-04-17 |