Nemotron 3 Ultra (550B A55B) vs Sakana Namazu: Specs & Benchmark Comparison
Nemotron 3 Ultra (550B A55B) is developed by NVIDIA, while Sakana Namazu comes from Sakana AI. Nemotron 3 Ultra (550B A55B) was released in June 2026, and Sakana Namazu followed 2 months later in August 2026. Nemotron 3 Ultra (550B A55B) has a published size of about 550 billion parameters; Sakana AI has not disclosed the parameter count of Sakana Namazu.
The two models share 2 published benchmarks. Sakana Namazu leads on 2 of them. The widest gaps are on MMLU-Pro, where Sakana Namazu scores 90.3% against 86.8%; LiveCodeBench v6, where Sakana Namazu scores 90.3% against 89.0%. Averaged across everything we track, Nemotron 3 Ultra (550B A55B) sits at 64.8% and Sakana Namazu at 92.4%.
Sakana Namazu is available through an API at $0.95 per million input tokens with a 256K-token context window. We do not track a hosted API for Nemotron 3 Ultra (550B A55B), so pricing and context cannot be compared directly.
| Characteristic | Nemotron 3 Ultra (550B A55B) | Sakana Namazu |
|---|---|---|
| Company | NVIDIA | Sakana AI |
| Release Date | June 4, 2026 | August 3, 2026 |
| Parameters | 550B | — |
| Multimodal | No | Yes |
| Context (input) | — | 256K |
| Context (output) | — | 256K |
| Input Price / 1M | — | $0.95 |
| Output Price / 1M | — | $4.00 |
| Average Score | 64.8% | 92.4% |
| Benchmarks | ||
| MMLU-Pro | 86.8% | 90.3% |
| LiveCodeBench v6 | 89.0% | 90.3% |
Visual Benchmark Comparison
Verdict
Sakana Namazu leads in 1 out of 2 comparison categories.
Both models show comparable average scores: Nemotron 3 Ultra (550B A55B) — 0.6, Sakana Namazu — 0.9.
Sakana Namazu is newer: released 8/3/2026 vs 6/4/2026.
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Frequently Asked Questions
Which is better for coding — Nemotron 3 Ultra (550B A55B) or Sakana Namazu?
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The Nemotron 3 Ultra (550B A55B) and Sakana Namazu comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Nemotron 3 Ultra (550B A55B) or Sakana Namazu page. See also the complete list of AI model comparisons.