Claude Sonnet 5 vs Nemotron 3 Ultra (550B A55B)
Claude Sonnet 5 leads the LLM Stats Score 48.5 to 36.3.
Anthropic · NVIDIA · Updated for 2026
Which is better?
Claude Sonnet 5 leads the overall LLM Stats Score 48.5 to 36.3, ranking #21 overall.
In the 4 individual benchmarks reported for both models, Claude Sonnet 5 wins 4; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Sonnet 5
- overall performance matters — it scores 48.5 and ranks #21 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 4 of 4 exact shared results
- you want the most recent training data — it shipped Jun 2026
Choose Nemotron 3 Ultra (550B A55B)
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
23 reported for Claude Sonnet 5 · 26 for Nemotron 3 Ultra (550B A55B)
Claude Sonnet 5 outperforms in 4 benchmarks (BrowseComp, Humanity's Last Exam, SWE-bench Multilingual, SWE-Bench Verified), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.
Claude Sonnet 5 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only Claude Sonnet 5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5 specifies output context (64,000 tokens).
Input capabilities
Documented input modalities across available providers
Claude Sonnet 5 supports multimodal inputs, whereas Nemotron 3 Ultra (550B A55B) does not.
Claude Sonnet 5 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude Sonnet 5
Nemotron 3 Ultra (550B A55B)
License
Usage and distribution terms
Claude Sonnet 5 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
Claude Sonnet 5 was released on 2026-06-30, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.
Claude Sonnet 5 is 1 month newer than Nemotron 3 Ultra (550B A55B).
Jun 30, 2026
2 months ago
3w newerJun 4, 2026
3 months ago
Knowledge Cutoff
When training data ends
Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Claude Sonnet 5'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 Claude Sonnet 5's cutoff date.
—
Sep 2025
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Sonnet 5 and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Sonnet 5 vs Nemotron 3 Ultra (550B A55B).