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...
Model details →NVIDIA: Nemotron 3 Ultra vs OpenAI: o3
NVIDIA: Nemotron 3 Ultra wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following....
Model details →Side-by-side comparison
| Capability | NVIDIA: Nemotron 3 Ultra | OpenAI: o3 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 512K | 200K | 🏆 NVIDIA: Nemotron 3 Ultra |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.60 | $2.00 | 🏆 NVIDIA: Nemotron 3 Ultra |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $3.60 | $8.00 | 🏆 NVIDIA: Nemotron 3 Ultra |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 OpenAI: o3 |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is NVIDIA: Nemotron 3 Ultra better than OpenAI: o3?
NVIDIA: Nemotron 3 Ultra wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between NVIDIA: Nemotron 3 Ultra and OpenAI: o3?
Input: $0.60 vs $2.00 per 1M tokens. Output: $3.60 vs $8.00 per 1M tokens.
What context windows do NVIDIA: Nemotron 3 Ultra and OpenAI: o3 support?
NVIDIA: Nemotron 3 Ultra supports up to 512K tokens. OpenAI: o3 supports up to 200K tokens.
Do both NVIDIA: Nemotron 3 Ultra and OpenAI: o3 support tool calling?
NVIDIA: Nemotron 3 Ultra: yes. OpenAI: o3: yes.
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