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Laguna XS 2.1 vs Nemotron 3 Ultra (550B A55B)

Nemotron 3 Ultra (550B A55B) leads the LLM Stats Score 36.2 to 24.4. Laguna XS 2.1 is 7.4x cheaper per token.

Poolside · NVIDIA · Updated for 2026

Which is better?

Nemotron 3 Ultra (550B A55B) leads the overall LLM Stats Score 36.2 to 24.4, ranking #82 overall.

The models split the 2 individual benchmarks reported for both models evenly.

On price, Laguna XS 2.1 is roughly 7.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

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

Choose Laguna XS 2.1

  • cost matters — it's about 7.4x cheaper per token
  • you want the most recent training data — it shipped Jul 2026

Choose Nemotron 3 Ultra (550B A55B)

  • overall performance matters — it scores 36.2 and ranks #82 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes

At a glance

The differences that matter most.

Laguna XS 2.1
Poolside
Nemotron 3 Ultra (550B A55B)
NVIDIA
Core performance indexes
LLM Stats Score
24.4
#166
36.2
#82
Reasoning
24.4
#160
35.4
#85
Coding
14.7
#135
21.0
#97
Agents
2.7
#167
12.4
#105
Cost, coverage & limits
Benchmark wins
1 of 2
1 of 2
Input price
$0.10 / M
$0.50 / M
Output price
$0.20 / M
$2.20 / M
Context window
262,144
262,144

Individual benchmarks

4 reported for Laguna XS 2.1 · 26 for Nemotron 3 Ultra (550B A55B)

2 shared

Laguna XS 2.1 outperforms in 1 benchmarks (SWE-Bench Verified), while Nemotron 3 Ultra (550B A55B) is better at 1 benchmark (SWE-bench Multilingual).

Both models are evenly matched across the benchmarks.

Tue Sep 22 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Laguna XS 2.1 costs less

For input processing, Laguna XS 2.1 ($0.10/1M tokens) is 5.0x cheaper than Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens).

For output processing, Laguna XS 2.1 ($0.20/1M tokens) is 11.0x cheaper than Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens).

In conclusion, Nemotron 3 Ultra (550B A55B) is more expensive than Laguna XS 2.1.*

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

Lowest available price from all providers
Tue Sep 22 2026 • llm-stats.com
Poolside
Laguna XS 2.1
Input tokens$0.10
Output tokens$0.20
Best providerPoolside
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input tokens$0.50
Output tokens$2.20
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

517.0B diff

Nemotron 3 Ultra (550B A55B) has 517.0B more parameters than Laguna XS 2.1, making it 1566.7% larger.

Poolside
Laguna XS 2.1
33.0Bparameters
NVIDIA
Nemotron 3 Ultra (550B A55B)
550.0Bparameters
33.0B
Laguna XS 2.1
550.0B
Nemotron 3 Ultra (550B A55B)

Context Window

Maximum input and output token capacity

Both models have the same input context window of 262,144 tokens. Only Nemotron 3 Ultra (550B A55B) specifies output context (262,144 tokens).

Poolside
Laguna XS 2.1
Input262,144 tokens
Output- tokens
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input262,144 tokens
Output262,144 tokens
Tue Sep 22 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under OpenMDW License v1.1.

Both models share the same licensing terms, providing consistent usage rights.

Laguna XS 2.1

OpenMDW License v1.1

Open weights

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Laguna XS 2.1 was released on 2026-07-02, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.

Laguna XS 2.1 is 1 month newer than Nemotron 3 Ultra (550B A55B).

Laguna XS 2.1

Jul 2, 2026

2 months ago

4w 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 Laguna XS 2.1'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 Laguna XS 2.1's cutoff date.

Laguna XS 2.1

—

Nemotron 3 Ultra (550B A55B)

Sep 2025

Provider Availability

Laguna XS 2.1 is available from Poolside. Nemotron 3 Ultra (550B A55B) is available from DeepInfra.

Laguna XS 2.1

poolside logo
Poolside
Input Price:Input: $0.10/1MOutput Price:Output: $0.20/1M

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 Laguna XS 2.1 and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.

Laguna XS 2.1
✓ Preferred
Nemotron 3 Ultra (550B A55B)
Open in Playground

FAQ

Common questions about Laguna XS 2.1 vs Nemotron 3 Ultra (550B A55B).

Which is better, Laguna XS 2.1 or Nemotron 3 Ultra (550B A55B)?

Nemotron 3 Ultra (550B A55B) leads the LLM Stats Score 36.2 to 24.4. Laguna XS 2.1 is made by Poolside 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 Laguna XS 2.1 compare to Nemotron 3 Ultra (550B A55B) in benchmarks?

Laguna XS 2.1 scores SWE-Bench Verified: 70.9%, SWE-bench Multilingual: 63.1%, SWE-Bench Pro: 47.6%, Terminal-Bench 2.0: 37.5%. Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%.

Is Laguna XS 2.1 cheaper than Nemotron 3 Ultra (550B A55B)?

Laguna XS 2.1 is 5.0x cheaper for input tokens. Laguna XS 2.1 costs $0.10/M input and $0.20/M output via poolside. Nemotron 3 Ultra (550B A55B) costs $0.50/M input and $2.20/M output via deepinfra.

What are the context window sizes for Laguna XS 2.1 and Nemotron 3 Ultra (550B A55B)?

Laguna XS 2.1 supports 262K 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 Laguna XS 2.1 and Nemotron 3 Ultra (550B A55B)?

Key differences include LLM Stats Score (24.4 vs 36.2), input pricing ($0.10 vs $0.50/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Laguna XS 2.1 and Nemotron 3 Ultra (550B A55B)?

Laguna XS 2.1 is developed by Poolside and Nemotron 3 Ultra (550B A55B) is developed by NVIDIA.

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