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Claude Sonnet 5.5 vs Nemotron Nano 9B v2

Claude Sonnet 5.5 leads the LLM Stats Score 58.0 to 18.4.

Anthropic · NVIDIA · Updated for 2026

Which is better?

Claude Sonnet 5.5 leads the overall LLM Stats Score 58.0 to 18.4, ranking #3 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Sonnet 5.5

  • overall performance matters — it scores 58.0 and ranks #3 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Nemotron Nano 9B v2

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Sonnet 5.5
Anthropic
Nemotron Nano 9B v2
NVIDIA
Core performance indexes
LLM Stats Score
58.0
#3
18.4
#219
Reasoning
56.6
#3
17.2
#218
Coding
48.8
#2
14.4
#141
Cost, coverage & limits
Benchmark wins
—
—
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

1 shared
Index
Claude Sonnet 5.5
Nemotron Nano 9B v2
Math
36.9#34
16.4#207
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

47 reported for Claude Sonnet 5.5 · 6 for Nemotron Nano 9B v2

No common benchmarks found

Claude Sonnet 5.5 and Nemotron Nano 9B v2don'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

Context Window

Maximum input and output token capacity

Only Claude Sonnet 5.5 specifies input context (1,000,000 tokens). Only Claude Sonnet 5.5 specifies output context (128,000 tokens).

Anthropic
Claude Sonnet 5.5
Input1,000,000 tokens
Output128,000 tokens
NVIDIA
Nemotron Nano 9B v2
Input- tokens
Output- tokens
Wed Sep 30 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Sonnet 5.5 supports multimodal inputs, whereas Nemotron Nano 9B v2 does not.

Claude Sonnet 5.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Sonnet 5.5

Text
Images
Audio
Video

Nemotron Nano 9B v2

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Sonnet 5.5 is licensed under a proprietary license, while Nemotron Nano 9B v2 uses NVIDIA Open Model License Agreement .

License differences may affect how you can use these models in commercial or open-source projects.

Claude Sonnet 5.5

Proprietary

Closed source

Nemotron Nano 9B v2

NVIDIA Open Model License Agreement

Open weights

Release Timeline

When each model was launched

Claude Sonnet 5.5 was released on 2026-09-28, while Nemotron Nano 9B v2 was released on 2025-08-18.

Claude Sonnet 5.5 is 14 months newer than Nemotron Nano 9B v2.

Claude Sonnet 5.5

Sep 28, 2026

1 days ago

1.1yr newer
Nemotron Nano 9B v2

Aug 18, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

Claude Sonnet 5.5 has a knowledge cutoff of 2026-06-01, while Nemotron Nano 9B v2 has a cutoff of 2024-09-01.

Claude Sonnet 5.5 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Nemotron Nano 9B v2 (2024-09-01).

Claude Sonnet 5.5

Jun 2026

1.8 yr newer
Nemotron Nano 9B v2

Sep 2024

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Sonnet 5.5 and Nemotron Nano 9B v2 side-by-side, then vote on the output you prefer.

Claude Sonnet 5.5
✓ Preferred
Nemotron Nano 9B v2
Open in Playground

FAQ

Common questions about Claude Sonnet 5.5 vs Nemotron Nano 9B v2.

Which is better, Claude Sonnet 5.5 or Nemotron Nano 9B v2?

Claude Sonnet 5.5 leads the LLM Stats Score 58.0 to 18.4. Claude Sonnet 5.5 is made by Anthropic and Nemotron Nano 9B v2 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 5.5 compare to Nemotron Nano 9B v2 in benchmarks?

Claude Sonnet 5.5 scores BenchCAD (with Python tool): 96.3%, ArXivMath (with tools): 95.2%, Global-MMLU: 92.1%, MILU: 91.6%, SWE-bench Multilingual: 90.3%. Nemotron Nano 9B v2 scores MATH-500: 97.8%, IFEval: 90.3%, AIME 2025: 72.1%, LiveCodeBench: 71.1%, BFCL_v3_MultiTurn: 66.9%.

What are the context window sizes for Claude Sonnet 5.5 and Nemotron Nano 9B v2?

Claude Sonnet 5.5 supports 1.0M tokens and Nemotron Nano 9B v2 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 5.5 and Nemotron Nano 9B v2?

Key differences include LLM Stats Score (58.0 vs 18.4), multimodal support (yes vs no), licensing (Proprietary vs NVIDIA Open Model License Agreement ). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Sonnet 5.5 and Nemotron Nano 9B v2?

Claude Sonnet 5.5 is developed by Anthropic and Nemotron Nano 9B v2 is developed by NVIDIA.

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