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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.

Claude Sonnet 5
Anthropic
Nemotron 3 Ultra (550B A55B)
NVIDIA
Core performance indexes
LLM Stats Score
48.5
#21
36.3
#74
Reasoning
47.8
#20
35.4
#76
Coding
37.0
#17
21.3
#84
Agents
31.4
#24
11.7
#98
Cost, coverage & limits
Benchmark wins
4 of 4
0 of 4
Input price
$2.00 / M
— / M
Output price
$10.00 / M
— / M
Context window
1,000,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Claude Sonnet 5
Nemotron 3 Ultra (550B A55B)
Math
38.4#26
36.2#38
Tool use
23.9#37
3.7#154
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

23 reported for Claude Sonnet 5 · 26 for Nemotron 3 Ultra (550B A55B)

4 shared

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.

Sat Sep 05 2026 • llm-stats.com

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).

Anthropic
Claude Sonnet 5
Input1,000,000 tokens
Output64,000 tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input- tokens
Output- tokens
Sat Sep 05 2026 • llm-stats.com

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

Text
Images
Audio
Video

Nemotron 3 Ultra (550B A55B)

Text
Images
Audio
Video

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.

Claude Sonnet 5

Proprietary

Closed source

Nemotron 3 Ultra (550B A55B)

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).

Claude Sonnet 5

Jun 30, 2026

2 months ago

3w newer
Nemotron 3 Ultra (550B A55B)

Jun 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.

Claude Sonnet 5

—

Nemotron 3 Ultra (550B A55B)

Sep 2025

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

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.

Claude Sonnet 5
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground

FAQ

Common questions about Claude Sonnet 5 vs Nemotron 3 Ultra (550B A55B).

Which is better, Claude Sonnet 5 or Nemotron 3 Ultra (550B A55B)?

Claude Sonnet 5 leads the LLM Stats Score 48.5 to 36.3. Claude Sonnet 5 is made by Anthropic and Nemotron 3 Ultra (550B A55B) is made by NVIDIA. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Sonnet 5 compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

Claude Sonnet 5 scores CharXiv-R: 88.3%, ChartMuseum: 86.7%, SWE-Bench Verified: 85.2%, BrowseComp: 84.7%, GDP.pdf: 81.6%. Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%.

What are the context window sizes for Claude Sonnet 5 and Nemotron 3 Ultra (550B A55B)?

Claude Sonnet 5 supports 1.0M tokens and Nemotron 3 Ultra (550B A55B) supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Sonnet 5 and Nemotron 3 Ultra (550B A55B)?

Key differences include LLM Stats Score (48.5 vs 36.3), multimodal support (yes vs no), licensing (Proprietary vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5 and Nemotron 3 Ultra (550B A55B)?

Claude Sonnet 5 is developed by Anthropic and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

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