Model Comparison

Claude Opus 4.5 vs Nemotron Nano 9B v2

Claude Opus 4.5 significantly outperforms across most benchmarks.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Opus 4.5 outperforms in 1 benchmarks (GPQA), while Nemotron Nano 9B v2 is better at 0 benchmarks.

Claude Opus 4.5 significantly outperforms across most benchmarks.

Sat May 02 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Claude Opus 4.5 specifies input context (200,000 tokens). Only Claude Opus 4.5 specifies output context (64,000 tokens).

Anthropic
Claude Opus 4.5
Input200,000 tokens
Output64,000 tokens
NVIDIA
Nemotron Nano 9B v2
Input- tokens
Output- tokens
Sat May 02 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Opus 4.5 supports multimodal inputs, whereas Nemotron Nano 9B v2 does not.

Claude Opus 4.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Opus 4.5

Text
Images
Audio
Video

Nemotron Nano 9B v2

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Opus 4.5 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 Opus 4.5

Proprietary

Closed source

Nemotron Nano 9B v2

NVIDIA Open Model License Agreement

Open weights

Release Timeline

When each model was launched

Claude Opus 4.5 was released on 2025-11-24, while Nemotron Nano 9B v2 was released on 2025-08-18.

Claude Opus 4.5 is 3 months newer than Nemotron Nano 9B v2.

Claude Opus 4.5

Nov 24, 2025

5 months ago

3mo newer
Nemotron Nano 9B v2

Aug 18, 2025

8 months ago

Knowledge Cutoff

When training data ends

Claude Opus 4.5 has a knowledge cutoff of 2025-03-31, while Nemotron Nano 9B v2 has a cutoff of 2024-09-01.

Claude Opus 4.5 has more recent training data (up to 2025-03-31), making it potentially better informed about events through that date compared to Nemotron Nano 9B v2 (2024-09-01).

Claude Opus 4.5

Mar 2025

6 mo newer
Nemotron Nano 9B v2

Sep 2024

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Higher GPQA score (87.0% vs 64.0%)
NVIDIA
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.5
NVIDIA
Nemotron Nano 9B v2

FAQ

Common questions about Claude Opus 4.5 vs Nemotron Nano 9B v2.

Which is better, Claude Opus 4.5 or Nemotron Nano 9B v2?

Claude Opus 4.5 significantly outperforms across most benchmarks. Claude Opus 4.5 is made by Anthropic and Nemotron Nano 9B v2 is made by NVIDIA. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 4.5 compare to Nemotron Nano 9B v2 in benchmarks?

Claude Opus 4.5 scores Tau2 Telecom: 98.2%, MMMLU: 90.8%, Tau2 Retail: 88.9%, GPQA: 87.0%, SWE-Bench Verified: 80.9%. 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 Opus 4.5 and Nemotron Nano 9B v2?

Claude Opus 4.5 supports 200K 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 Opus 4.5 and Nemotron Nano 9B v2?

Key differences include 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 Opus 4.5 and Nemotron Nano 9B v2?

Claude Opus 4.5 is developed by Anthropic and Nemotron Nano 9B v2 is developed by NVIDIA.