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Claude Sonnet 5 vs Nemotron 3 Ultra (550B A55B)

Claude Sonnet 5 leads the LLM Stats Score 48.3 to 36.3. Nemotron 3 Ultra (550B A55B) is 4.3x cheaper per token.

Anthropic · NVIDIA · Updated for 2026

Which is better?

Claude Sonnet 5 leads the overall LLM Stats Score 48.3 to 36.3, ranking #23 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.

On price, Nemotron 3 Ultra (550B A55B) is roughly 4.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Sonnet 5 also accepts a larger context window (1,000,000 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 Claude Sonnet 5

  • overall performance matters — it scores 48.3 and ranks #23 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 process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Jun 2026

Choose Nemotron 3 Ultra (550B A55B)

  • cost matters — it's about 4.3x cheaper per token
  • 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
48.3
#23
36.3
#79
Reasoning
47.7
#22
35.4
#82
Coding
36.9
#19
21.0
#93
Agents
31.6
#28
12.5
#101
Cost, coverage & limits
Benchmark wins
4 of 4
0 of 4
Input price
$2.00 / M
$0.50 / M
Output price
$10.00 / M
$2.20 / M
Context window
1,000,000
262,144

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Claude Sonnet 5
Nemotron 3 Ultra (550B A55B)
Math
39.0#24
36.4#39
Tool use
24.0#39
2.8#166
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.

Mon Sep 21 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Nemotron 3 Ultra (550B A55B) costs less

For input processing, Claude Sonnet 5 ($2.00/1M tokens) is 4.0x more expensive than Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens).

For output processing, Claude Sonnet 5 ($10.00/1M tokens) is 4.5x more expensive than Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens).

In conclusion, Claude Sonnet 5 is more expensive than Nemotron 3 Ultra (550B A55B).*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Mon Sep 21 2026 • llm-stats.com
Anthropic
Claude Sonnet 5
Input tokens$2.00
Output tokens$10.00
Best providerAnthropic
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input tokens$0.50
Output tokens$2.20
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Sonnet 5 accepts 1,000,000 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 Claude Sonnet 5 is limited to 64,000 tokens.

Anthropic
Claude Sonnet 5
Input1,000,000 tokens
Output64,000 tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input262,144 tokens
Output262,144 tokens
Mon Sep 21 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

Provider Availability

Claude Sonnet 5 is available from Anthropic, DeepInfra. Nemotron 3 Ultra (550B A55B) is available from DeepInfra.

Claude Sonnet 5

anthropic logo
Anthropic
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
deepinfra logo
Deepinfra
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

Nemotron 3 Ultra (550B A55B)

deepinfra logo
Deepinfra
Input Price:Input: $0.50/1MOutput Price:Output: $2.20/1M
* Prices shown are per million tokens

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 48.3 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%.

Is Claude Sonnet 5 cheaper than Nemotron 3 Ultra (550B A55B)?

Nemotron 3 Ultra (550B A55B) is 4.0x cheaper for input tokens. Claude Sonnet 5 costs $2.00/M input and $10.00/M output via anthropic. Nemotron 3 Ultra (550B A55B) costs $0.50/M input and $2.20/M output via deepinfra.

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 262K 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 (48.3 vs 36.3), context window (1.0M vs 262K), input pricing ($2.00 vs $0.50/M), 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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