Model Comparison

Claude Haiku 4.5 vs Llama 3.1 Nemotron Ultra 253B v1Which is better in 2026?

Both models are evenly matched across the benchmarks.

Verdict: Claude Haiku 4.5 vs Llama 3.1 Nemotron Ultra 253B v1 — which is better?

Claude Haiku 4.5 (by Anthropic) and Llama 3.1 Nemotron Ultra 253B v1 (by NVIDIA) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Haiku 4.5 outperforms in 1 benchmarks (AIME 2025), while Llama 3.1 Nemotron Ultra 253B v1 is better at 1 benchmark (GPQA). Both models are evenly matched across the benchmarks.

Choose Claude Haiku 4.5 if…

  • you want the most recent training data — it shipped Oct 2025

Choose Llama 3.1 Nemotron Ultra 253B v1 if…

  • you need open weights you can self-host or fine-tune
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Haiku 4.5 outperforms in 1 benchmarks (AIME 2025), while Llama 3.1 Nemotron Ultra 253B v1 is better at 1 benchmark (GPQA).

Both models are evenly matched across the benchmarks.

Thu Jun 25 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

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

Anthropic
Claude Haiku 4.5
Input200,000 tokens
Output64,000 tokens
NVIDIA
Llama 3.1 Nemotron Ultra 253B v1
Input- tokens
Output- tokens
Thu Jun 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude Haiku 4.5 supports multimodal inputs, whereas Llama 3.1 Nemotron Ultra 253B v1 does not.

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

Claude Haiku 4.5

Text
Images
Audio
Video

Llama 3.1 Nemotron Ultra 253B v1

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Haiku 4.5 is licensed under a proprietary license, while Llama 3.1 Nemotron Ultra 253B v1 uses Llama 3.1 Community License.

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

Claude Haiku 4.5

Proprietary

Closed source

Llama 3.1 Nemotron Ultra 253B v1

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Claude Haiku 4.5 was released on 2025-10-15, while Llama 3.1 Nemotron Ultra 253B v1 was released on 2025-04-07.

Claude Haiku 4.5 is 6 months newer than Llama 3.1 Nemotron Ultra 253B v1.

Claude Haiku 4.5

Oct 15, 2025

8 months ago

6mo newer
Llama 3.1 Nemotron Ultra 253B v1

Apr 7, 2025

1.2 years ago

Knowledge Cutoff

When training data ends

Claude Haiku 4.5 has a knowledge cutoff of 2025-02-01, while Llama 3.1 Nemotron Ultra 253B v1 has a cutoff of 2023-12-01.

Claude Haiku 4.5 has more recent training data (up to 2025-02-01), making it potentially better informed about events through that date compared to Llama 3.1 Nemotron Ultra 253B v1 (2023-12-01).

Claude Haiku 4.5

Feb 2025

1.2 yr newer
Llama 3.1 Nemotron Ultra 253B v1

Dec 2023

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Higher AIME 2025 score (80.7% vs 72.5%)
NVIDIA
Has open weights
Higher GPQA score (76.0% vs 73.0%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Haiku 4.5
NVIDIA
Llama 3.1 Nemotron Ultra 253B v1

FAQ

Common questions about Claude Haiku 4.5 vs Llama 3.1 Nemotron Ultra 253B v1.

Which is better, Claude Haiku 4.5 or Llama 3.1 Nemotron Ultra 253B v1?

Both models are evenly matched across the benchmarks. Claude Haiku 4.5 is made by Anthropic and Llama 3.1 Nemotron Ultra 253B v1 is made by NVIDIA. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Haiku 4.5 compare to Llama 3.1 Nemotron Ultra 253B v1 in benchmarks?

Claude Haiku 4.5 scores Tau2 Retail: 83.2%, MMMLU: 83.0%, Tau2 Telecom: 83.0%, AIME 2025: 80.7%, SWE-Bench Verified: 73.3%. Llama 3.1 Nemotron Ultra 253B v1 scores MATH-500: 97.0%, IFEval: 89.5%, GPQA: 76.0%, BFCL v2: 74.1%, AIME 2025: 72.5%.

What are the context window sizes for Claude Haiku 4.5 and Llama 3.1 Nemotron Ultra 253B v1?

Claude Haiku 4.5 supports 200K tokens and Llama 3.1 Nemotron Ultra 253B v1 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 Haiku 4.5 and Llama 3.1 Nemotron Ultra 253B v1?

Key differences include multimodal support (yes vs no), licensing (Proprietary vs Llama 3.1 Community License). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Haiku 4.5 and Llama 3.1 Nemotron Ultra 253B v1?

Claude Haiku 4.5 is developed by Anthropic and Llama 3.1 Nemotron Ultra 253B v1 is developed by NVIDIA.

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