Ember-1 vs Nemotron 3 Ultra (550B A55B)
Ember-1 leads the LLM Stats Score 43.1 to 36.0. Nemotron 3 Ultra (550B A55B) is 6.5x cheaper per token.
Fireworks AI · NVIDIA · Updated for 2026
Which is better?
Ember-1 leads the overall LLM Stats Score 43.1 to 36.0, ranking #51 overall.
In the 2 individual benchmarks reported for both models, Ember-1 wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Nemotron 3 Ultra (550B A55B) is roughly 6.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Ember-1 also accepts a larger context window (1,040,000 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 Ember-1
- overall performance matters — it scores 43.1 and ranks #51 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you process long inputs — it offers a 1,040,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Nemotron 3 Ultra (550B A55B)
- cost matters — it's about 6.5x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
4 reported for Ember-1 · 26 for Nemotron 3 Ultra (550B A55B)
Ember-1 outperforms in 2 benchmarks (SWE-Bench Verified, Terminal-Bench 2.1), while Nemotron 3 Ultra (550B A55B) is better at 0 benchmarks.
Ember-1 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Ember-1 ($3.00/1M tokens) is 6.0x more expensive than Nemotron 3 Ultra (550B A55B) ($0.50/1M tokens).
For output processing, Ember-1 ($15.00/1M tokens) is 6.8x more expensive than Nemotron 3 Ultra (550B A55B) ($2.20/1M tokens).
In conclusion, Ember-1 is more expensive than Nemotron 3 Ultra (550B A55B).*
* Using a 3:1 ratio of input to output tokens
Model Size
Parameter count comparison
Ember-1 has 2230.0B more parameters than Nemotron 3 Ultra (550B A55B), making it 405.5% larger.
Context Window
Maximum input and output token capacity
Ember-1 accepts 1,040,000 input tokens compared to Nemotron 3 Ultra (550B A55B)'s 262,144 tokens. Only Nemotron 3 Ultra (550B A55B) specifies output context (262,144 tokens).
License
Usage and distribution terms
Ember-1 is licensed under a proprietary license, while Nemotron 3 Ultra (550B A55B) uses OpenMDW License v1.1.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
OpenMDW License v1.1
Open weights
Release Timeline
When each model was launched
Ember-1 was released on 2026-09-23, while Nemotron 3 Ultra (550B A55B) was released on 2026-06-04.
Ember-1 is 4 months newer than Nemotron 3 Ultra (550B A55B).
Sep 23, 2026
2 weeks ago
3mo newerJun 4, 2026
4 months ago
Knowledge Cutoff
When training data ends
Nemotron 3 Ultra (550B A55B) has a documented knowledge cutoff of 2025-09-30, while Ember-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 Ember-1's cutoff date.
—
Sep 2025
Provider Availability
Ember-1 is available from Fireworks. Nemotron 3 Ultra (550B A55B) is available from DeepInfra.
Ember-1
Nemotron 3 Ultra (550B A55B)
Outputs Comparison
Judge for yourself.
Run your own prompts against Ember-1 and Nemotron 3 Ultra (550B A55B) side-by-side, then vote on the output you prefer.
FAQ
Common questions about Ember-1 vs Nemotron 3 Ultra (550B A55B).