GPT-6 Rosalind vs Nemotron 3 Ultra (550B A55B)
Comparing GPT-6 Rosalind and Nemotron 3 Ultra (550B A55B) across benchmarks, pricing, and capabilities.
OpenAI · NVIDIA · Updated for 2026
Which is better?
GPT-6 Rosalind and Nemotron 3 Ultra (550B A55B) trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Nemotron 3 Ultra (550B A55B) is roughly 32.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-6 Rosalind
- you want the most recent training data — it shipped Oct 2026
Choose Nemotron 3 Ultra (550B A55B)
- cost matters — it's about 32.4x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
0 reported for GPT-6 Rosalind · 26 for Nemotron 3 Ultra (550B A55B)
GPT-6 Rosalind and Nemotron 3 Ultra (550B A55B)don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-6 Rosalind ($15.00/1M tokens) is 30.0x more expensive than Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens).
For output processing, GPT-6 Rosalind ($75.00/1M tokens) is 34.1x more expensive than Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens).
In conclusion, GPT-6 Rosalind is more expensive than Nemotron 3 Ultra (550B A55B).*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Only Nemotron 3 Ultra (550B A55B) specifies input context (262,144 tokens). Only Nemotron 3 Ultra (550B A55B) specifies output context (262,144 tokens).
Input capabilities
Documented input modalities across available providers
GPT-6 Rosalind supports multimodal inputs, whereas Nemotron 3 Ultra (550B A55B) does not.
GPT-6 Rosalind can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-6 Rosalind
Nemotron 3 Ultra (550B A55B)
License
Usage and distribution terms
GPT-6 Rosalind is licensed under a proprietary license, while Nemotron 3 Ultra (550B A55B) uses OpenMDW License v1.1.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
OpenMDW License v1.1
Open weights
Release Timeline
When each model was launched
GPT-6 Rosalind was released on 2026-10-30, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.
GPT-6 Rosalind is 5 months newer than Nemotron 3 Ultra (550B A55B).
Oct 30, 2026
6 days ago
4mo newerJun 4, 2026
5 months ago
Knowledge Cutoff
When training data ends
Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while GPT-6 Rosalind'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 GPT-6 Rosalind's cutoff date.
—
Sep 2025
Provider Availability
GPT-6 Rosalind is available from OpenAI. Nemotron 3 Ultra (550B A55B) is available from DeepInfra.
GPT-6 Rosalind
Nemotron 3 Ultra (550B A55B)
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6 Rosalind and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6 Rosalind vs Nemotron 3 Ultra (550B A55B).