LOADING DATASHEET
GROUNDED IN REAL HUMAN CONVERSATIONSYOUR BENCH
Nemotron 3 Ultra
◆ OPEN
by Nvidia
OPEN WEIGHTSLOCALAPILONG CONTEXTPAIDFREE TO TRY
RANKED #102 OF 316 ASSISTANTS · OVERALL #135 OF 493 RANKED · VIBE SCORE 5.8 · 387 VOICES ·
COPY BADGE pastes a README snippet with the rank SVG.
Nemotron-3-Ultra-550B-A55B-NVFP4 is a frontier-scale large language model (LLM) trained by NVIDIA, designed to deliver strong agentic, reasoning, and conversational capabilities. It is optimized for the most demanding workloads, including c
HAPPY8.4
29 mentions
SAD6.6
20 mentions
VIBE TRAJECTORY
26 weeks · 420 voices in this window
HONEYMOON FADING
Early praise is cooling off in recent weeks.
HOW TO USE IT
Open weights. You can use a hosted service, or download it and run it yourself, free.
RUN IT ON YOUR OWN MACHINE
Open weights: download Nemotron 3 Ultra once and it's yours. No subscription, no rate limits, works offline.
550B total parameters (55B active MoE), a 4-bit quantized file (NVFP4 or MLX 4-bit) requires about 300 to 335 GB of memory
- BARE MINIMUM
Custom PC with 512 GB system RAM and single RTX 4090 (24 GB)
512 GB DDR5 RAM + 24 GB VRAM
~$3500 BUILTThe model is too large for single consumer GPUs; CPU RAM offloading with 4-bit quant runs extremely slowly at around 1 t
- SWEET SPOT
Apple Mac Studio (M3/M4 Ultra) with max unified memory
512 GB UNIFIED MEMORY
~$7500 NEWMLX 4-bit quant, usable daily-driver speed at around 8 to 14 tok/s with moderate context
- FULL POWER
Multi-GPU workstation with 8x NVIDIA RTX 6000 Ada (or 8x H10
384 GB TO 640 GB VRAM
~$60000 BUILTFull FP8 / BF16 precision, native high-speed throughput up to 35+ tok/s and full long context
LEARN HOW TO SET IT UP
WILL MY BOX RUN NEMOTRON 3 ULTRA?
The three cards above are researched picks. Search the machine you actually have — we only say yes if it should reply at a usable speed, not just load the weights and crawl.
HARDWARE PICKS & PRICES ARE RESEARCHED FROM THE LIVE WEB AND REFRESHED AUTOMATICALLY. TREAT THEM AS BALLPARK, NOT GOSPEL.
WHAT CAN YOU ACTUALLY DO WITH IT?
Everyday jobs on each of those rigs: how long Nemotron 3 Ultra takes, and how good the crowd says it is at that kind of work.
| THE JOB | BARE MINIMUMCustom PC with 512 GB system RAM and single RTX 4090 (24 GB) | SWEET SPOTApple Mac Studio (M3/M4 Ultra) with max unified memory | FULL POWERMulti-GPU workstation with 8x NVIDIA RTX 6000 Ada (or 8x H10 |
|---|---|---|---|
| Write an emaila paragraph or two, drafted from a one-line brief | —★★★★★ | ~45 S★★★★★ | —★★★★★ |
| Summarize a documenta long report boiled down to the points that matter | —★★★★★ | ~2.3 MIN★★★★★ | —★★★★★ |
| Build a websitea small landing page, markup and styles together | —★★★★★ | ~12 MIN★★★★★ | —★★★★★ |
| Build a backendan API with routes, storage and tests | —★★★★★ | ~38 MIN★★★★★ | —★★★★★ |
| Build a gamea playable browser game in one file | —★★★★★ | ~23 MIN★★★★★ | —★★★★★ |
STARS ARE THE COMMUNITY SCORE FOR THAT KIND OF WORK, DOCKED FOR HOW SQUASHED THE WEIGHTS GET AT EACH TIER. A DASH MEANS NO SPEED WAS RESEARCHED FOR THAT RIG. TIMES ARE COMPUTED FROM RESEARCHED SPEEDS. BALLPARK, NOT GOSPEL.
WHAT THE INTERNET SAYS
The internet is split on Nemotron 3 Ultra. Biggest praise: getting facts right. Biggest gripe: saying no too much.
354 POSTS · 33 COMMENTS · REDDIT · X · GITHUB · HACKER NEWS · DEV.TO · BLOG · BLUESKY · LEMMY
PEOPLE LOVE
- Popular for coding help (6 mentions)
- People feel it is worth the money (5 mentions)
- Answers come back fast (4 mentions)
- Usually gives correct answers (4 mentions)
PEOPLE COMPLAIN ABOUT
- Refuses or lectures more than people like (6 mentions)
- Outages, errors, or limits get in the way (6 mentions)
TOPIC BY TOPIC
- Help with codeMOSTLY POSITIVE
6 thumbs up · 4 thumbs down
- PriceMOSTLY POSITIVE
5 thumbs up · 3 thumbs down
- Saying no too muchA SORE SPOT
1 thumbs up · 6 thumbs down
- Working when you need itA SORE SPOT
1 thumbs up · 6 thumbs down
- SpeedPEOPLE LOVE THIS
4 thumbs up · 1 thumbs down
- Getting facts rightPEOPLE LOVE THIS
4 thumbs up · 0 thumbs down
LOOKING FOR AN ALTERNATIVE?
Checked picks first: tags say why you would switch, stars say how fully each one stands in for Nemotron 3 Ultra.
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- REDDIT · 2026-03-16 · 406 UPVOTESINCREDIBLE STUFF INCOMING
INCREDIBLE STUFF INCOMING
- REDDIT · 2026-07-15 · 289 UPVOTESInkling by Thinking Machines is the #1 US open weight model now
Inkling by Thinking Machines is the #1 US open weight model now
- REDDIT · 2026-06-09 · 172 UPVOTESWelcome all! Here is the Weekly SillyTavern News Ep. 9: We will discuss new models such as MiniMax 3.0 and Nemotron 3 Ultra. Plotpoints is…
Welcome all! Here is the Weekly SillyTavern News Ep. 9: We will discuss new models such as MiniMax 3.0 and Nemotron 3 Ultra. Plotpoints is back at it with more LLM rankings! A new tool to find better character cards. Some fun facts on LLM writing errors and…
- REDDIT · 2026-07-21 · 165 UPVOTESOpenAI exec crashes out, calls open-source models "AI communism"
OpenAI exec crashes out, calls open-source models "AI communism"
- REDDIT · 2026-06-04 · 146 UPVOTESNVIDIA Nemotron 3 Ultra is out now!
NVIDIA Nemotron 3 Ultra is out now!
- REDDIT · 2026-06-01 · 102 UPVOTESNemotron 3 Ultra is here, Launching in a few days, open source
Nemotron 3 Ultra is here, Launching in a few days, open source
- LEMMY · 2026-07-21 · 68 UPVOTESTop American AI Execs urge regulation on cheap chinese AI models. suggest a possibility of a global AI communism otherwise
Top American AI Execs urge regulation on cheap chinese AI models. suggest a possibility of a global AI communism otherwise
- REDDIT · 2026-06-30 · 64 UPVOTESClaude Sonnet 5 Artificial Analysis Results & Comparison
Claude Sonnet 5 Artificial Analysis Results & Comparison
- REDDIT · 2026-06-21 · 62 UPVOTESGemini is actually damn good for rp, I don't get what's the hate for.
Gemini is actually damn good for rp, I don't get what's the hate for.
- REDDIT · 2026-07-10 · 60 UPVOTESArtificial Analysis: Muse Spark 1.1 Results
Artificial Analysis: Muse Spark 1.1 Results
- REDDIT · 2026-07-17 · 44 UPVOTESAnthropic Leads top 10 models by $/spent
Anthropic Leads top 10 models by $/spent
- REDDIT · 2026-06-07 · 39 UPVOTESSo I tested Nvidia Nemotron 3 Ultra
So I tested Nvidia Nemotron 3 Ultra