Nemotron 3 Ultra (550B A55B) vs Particle-1
Nemotron 3 Ultra (550B A55B) and Particle-1 are closely matched at 35.7 and 32.0 on the LLM Stats Score. Particle-1 is 2.1x cheaper per token.
NVIDIA · Particle AI · Updated for 2026
Which is better?
Nemotron 3 Ultra (550B A55B) and Particle-1 are closely matched on the overall LLM Stats Score at 35.7 and 32.0.
In the 1 individual benchmarks reported for both models, Particle-1 wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, Particle-1 is roughly 2.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Particle-1 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Nemotron 3 Ultra (550B A55B)
- you need open weights you can self-host or fine-tune
Choose Particle-1
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- cost matters — it's about 2.1x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Oct 2026
At a glance
The differences that matter most.
Individual benchmarks
26 reported for Nemotron 3 Ultra (550B A55B) · 3 for Particle-1
Nemotron 3 Ultra (550B A55B) outperforms in 0 benchmarks, while Particle-1 is better at 1 benchmark (GPQA).
Particle-1 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens) is 2.0x more expensive than Particle-1 ($0.25/1M tokens).
For output processing, Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens) is 2.2x more expensive than Particle-1 ($1.00/1M tokens).
In conclusion, Nemotron 3 Ultra (550B A55B) is more expensive than Particle-1.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Particle-1 accepts 1,048,576 input tokens compared to Nemotron 3 Ultra (550B A55B)'s 262,144 tokens. Nemotron 3 Ultra (550B A55B) can generate longer responses up to 262,144 tokens, while Particle-1 is limited to 131,072 tokens.
Input capabilities
Documented input modalities across available providers
Particle-1 supports multimodal inputs, whereas Nemotron 3 Ultra (550B A55B) does not.
Particle-1 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Nemotron 3 Ultra (550B A55B)
Particle-1
License
Usage and distribution terms
Nemotron 3 Ultra (550B A55B) is licensed under OpenMDW License v1.1, while Particle-1 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
OpenMDW License v1.1
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Nemotron 3 Ultra (550B A55B) was released on 2026-06-04, while Particle-1 was released on 2026-10-28.
Particle-1 is 5 months newer than Nemotron 3 Ultra (550B A55B).
Jun 4, 2026
5 months ago
Oct 28, 2026
1 weeks ago
4mo newerKnowledge Cutoff
When training data ends
Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Particle-1's cutoff date is not specified.
We can confirm Nemotron 3 Ultra (550B A55B)'s training data extends to 2025-09-30, but cannot make a direct comparison without Particle-1's cutoff date.
Sep 2025
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Provider Availability
Nemotron 3 Ultra (550B A55B) is available from DeepInfra. Particle-1 is available from Particle AI.
Nemotron 3 Ultra (550B A55B)
Particle-1
Outputs Comparison
Judge for yourself.
Run your own prompts against Nemotron 3 Ultra (550B A55B) and Particle-1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Nemotron 3 Ultra (550B A55B) vs Particle-1.