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Nemotron 3 Ultra (550B A55B) vs Sakana Namazu

Sakana Namazu leads the LLM Stats Score 42.2 to 36.3. Nemotron 3 Ultra (550B A55B) is 1.9x cheaper per token.

NVIDIA · Sakana AI · Updated for 2026

Which is better?

Sakana Namazu leads the overall LLM Stats Score 42.2 to 36.3, ranking #48 overall.

In the 2 individual benchmarks reported for both models, Sakana Namazu wins 2; this is a narrower head-to-head signal than the composite indexes.

On price, Nemotron 3 Ultra (550B A55B) is roughly 1.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Nemotron 3 Ultra (550B A55B) also accepts a larger context window (262,144 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 Nemotron 3 Ultra (550B A55B)

  • cost matters — it's about 1.9x cheaper per token
  • you process long inputs — it offers a 262,144 token context window
  • you need open weights you can self-host or fine-tune

Choose Sakana Namazu

  • overall performance matters — it scores 42.2 and ranks #48 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Nemotron 3 Ultra (550B A55B)
NVIDIA
Sakana Namazu
Sakana AI
Core performance indexes
LLM Stats Score
36.3
#77
42.2
#48
Reasoning
35.5
#80
42.0
#45
Cost, coverage & limits
Benchmark wins
0 of 2
2 of 2
Input price
$0.50 / M
$0.95 / M
Output price
$2.20 / M
$4.00 / M
Context window
262,144
256,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Nemotron 3 Ultra (550B A55B)
Sakana Namazu
Math
36.4#38
38.5#26
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

26 reported for Nemotron 3 Ultra (550B A55B) · 3 for Sakana Namazu

2 shared

Nemotron 3 Ultra (550B A55B) outperforms in 0 benchmarks, while Sakana Namazu is better at 2 benchmarks (LiveCodeBench v6, MMLU-Pro).

Sakana Namazu significantly outperforms across most benchmarks.

Thu Sep 10 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, Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens) is 1.9x cheaper than Sakana Namazu ($0.95/1M tokens).

For output processing, Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens) is 1.8x cheaper than Sakana Namazu ($4.00/1M tokens).

In conclusion, Sakana Namazu 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
Thu Sep 10 2026 • llm-stats.com
NVIDIA
Nemotron 3 Ultra (550B A55B)
Input tokens$0.50
Output tokens$2.20
Best providerDeepinfra
Sakana AI
Sakana Namazu
Input tokens$0.95
Output tokens$4.00
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Nemotron 3 Ultra (550B A55B) accepts 262,144 input tokens compared to Sakana Namazu's 256,000 tokens. Nemotron 3 Ultra (550B A55B) can generate longer responses up to 262,144 tokens, while Sakana Namazu is limited to 256,000 tokens.

NVIDIA
Nemotron 3 Ultra (550B A55B)
Input262,144 tokens
Output262,144 tokens
Sakana AI
Sakana Namazu
Input256,000 tokens
Output256,000 tokens
Thu Sep 10 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Sakana Namazu supports multimodal inputs, whereas Nemotron 3 Ultra (550B A55B) does not.

Sakana Namazu can handle both text and other forms of data like images, making it suitable for multimodal applications.

Nemotron 3 Ultra (550B A55B)

Text
Images
Audio
Video

Sakana Namazu

Text
Images
Audio
Video

License

Usage and distribution terms

Nemotron 3 Ultra (550B A55B) is licensed under OpenMDW License v1.1, while Sakana Namazu uses a proprietary license.

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

Nemotron 3 Ultra (550B A55B)

OpenMDW License v1.1

Open weights

Sakana Namazu

Proprietary

Closed source

Release Timeline

When each model was launched

Nemotron 3 Ultra (550B A55B) was released on 2026-06-04, while Sakana Namazu was released on 2026-08-03.

Sakana Namazu is 2 months newer than Nemotron 3 Ultra (550B A55B).

Nemotron 3 Ultra (550B A55B)

Jun 4, 2026

3 months ago

Sakana Namazu

Aug 3, 2026

1 months ago

2mo newer

Knowledge Cutoff

When training data ends

Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Sakana Namazu'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 Sakana Namazu's cutoff date.

Nemotron 3 Ultra (550B A55B)

Sep 2025

Sakana Namazu

—

Provider Availability

Nemotron 3 Ultra (550B A55B) is available from DeepInfra. Sakana Namazu is available from Sakana AI.

Nemotron 3 Ultra (550B A55B)

deepinfra logo
Deepinfra
Input Price:Input: $0.50/1MOutput Price:Output: $2.20/1M

Sakana Namazu

sakana logo
Unknown Organization
Input Price:Input: $0.95/1MOutput Price:Output: $4.00/1M
* 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 Nemotron 3 Ultra (550B A55B) and Sakana Namazu side-by-side, then vote on the output you prefer.

Nemotron 3 Ultra (550B A55B)
✓ Preferred
Sakana Namazu
Open in Playground

FAQ

Common questions about Nemotron 3 Ultra (550B A55B) vs Sakana Namazu.

Which is better, Nemotron 3 Ultra (550B A55B) or Sakana Namazu?

Sakana Namazu leads the LLM Stats Score 42.2 to 36.3. Nemotron 3 Ultra (550B A55B) is made by NVIDIA and Sakana Namazu is made by Sakana AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Nemotron 3 Ultra (550B A55B) compare to Sakana Namazu in benchmarks?

Nemotron 3 Ultra (550B A55B) scores RULER: 94.7%, IMO-AnswerBench: 92.3%, PinchBench: 90.0%, LiveCodeBench v6: 89.0%, GPQA: 87.0%. Sakana Namazu scores AIME 2026: 96.7%, LiveCodeBench v6: 90.3%, MMLU-Pro: 90.3%.

Is Nemotron 3 Ultra (550B A55B) cheaper than Sakana Namazu?

Nemotron 3 Ultra (550B A55B) is 1.9x cheaper for input tokens. Nemotron 3 Ultra (550B A55B) costs $0.50/M input and $2.20/M output via deepinfra. Sakana Namazu costs $0.95/M input and $4.00/M output via sakana.

What are the context window sizes for Nemotron 3 Ultra (550B A55B) and Sakana Namazu?

Nemotron 3 Ultra (550B A55B) supports 262K tokens and Sakana Namazu supports 256K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Nemotron 3 Ultra (550B A55B) and Sakana Namazu?

Key differences include LLM Stats Score (36.3 vs 42.2), context window (262K vs 256K), input pricing ($0.50 vs $0.95/M), multimodal support (no vs yes), licensing (OpenMDW License v1.1 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Nemotron 3 Ultra (550B A55B) and Sakana Namazu?

Nemotron 3 Ultra (550B A55B) is developed by NVIDIA and Sakana Namazu is developed by Sakana AI.

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