NVIDIA Nemotron 3 Ultra 550B A55B BF16 vs GLM 5.3 Flash
GLM 5.3 Flash leads llmrun Score 124.2 to 109.9; neither fits 24 GB.
Model A · NVIDIA
NVIDIA Nemotron 3 Ultra 550B A55B BF16560.5B · 57B active · 256K context · Other · Jun 2026
Model B · Z.ai
GLM 5.3 Flash321.3B · 18.3B active · 1M context · MIT · Aug 2026
Choose NVIDIA Nemotron 3 Ultra 550B A55B BF16 if you want…
Also does chat
GLM 5.3 Flash doesn't list it
Choose GLM 5.3 Flash if you want…
Higher llmrun Score
124.2 vs 109.9
Stronger at agents
127.4 vs 102.1
Stronger at coding
117.4 vs 104.0
Ahead on the benchmarks
12 of 14 shared boards
Lighter on memory
194.6 vs 370.0 GB at Q4_K_M
Longer context window
1M vs 256K tokens
On your hardware
Each model at its default quant (Q4_K_M), a smaller one when it must. Estimates, ±20%.
8 GB
RTX 4060 · 8 GB tier
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
Doesn't fit
smallest quant needs 100.7 GB
12 GB
RTX 3060 12GB · 12 GB tier
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
Doesn't fit
smallest quant needs 100.7 GB
16 GB
RTX 5060 Ti 16GB · 16 GB tier
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
Doesn't fit
smallest quant needs 100.7 GB
24 GBreference
RTX 4090 · 24 GB tier
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
Doesn't fit
smallest quant needs 100.7 GB
32 GB
RTX 5090 · 32 GB tier
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
Doesn't fit
smallest quant needs 100.7 GB
48 GB
RTX A6000 · 48 GB tier
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
Doesn't fit
smallest quant needs 100.7 GB
Mac 32 GB
Mac Mini M4 · Macs
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
Doesn't fit
smallest quant needs 100.7 GB
Mac 64 GB
Mac Studio M4 Max · Macs
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
Doesn't fit
smallest quant needs 100.7 GB
Mac 128 GB
Mac Studio M4 Max · Macs
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Doesn't fit
smallest quant needs 178 GB
GLM 5.3 Flash
IQ2_S · ~41 tok/s
112.8 GB · up to 16Kfits
Reference GPU: RTX 4090. Tinted cell = the better pick on that machine (fits, more headroom, or at least 10% faster).
Overall
NVIDIA Nemotron 3 Ultra 550B A55B BF16
GLM 5.3 Flash
Coding
NVIDIA Nemotron 3 Ultra 550B A55B BF16
GLM 5.3 Flash
Agents
NVIDIA Nemotron 3 Ultra 550B A55B BF16
GLM 5.3 Flash
Math
NVIDIA Nemotron 3 Ultra 550B A55B BF16
GLM 5.3 Flash
Science
NVIDIA Nemotron 3 Ultra 550B A55B BF16
GLM 5.3 Flash
Reasoning
NVIDIA Nemotron 3 Ultra 550B A55B BF16
GLM 5.3 Flash
NVIDIA Nemotron 3 Ultra 550B A55B BF16 · #26 of 100 open models · #23 of 96 that fit ≤512 GB
GLM 5.3 Flash · #9 of 100 open models · #4 of 84 that fit ≤256 GB
Benchmarks
14 shared boards: NVIDIA Nemotron 3 Ultra 550B A55B BF16 leads 2, GLM 5.3 Flash leads 12 · Benchmarks imported Oct 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
85.4%#20/98 open
IndependentEpoch AI · Jun 2026
GLM 5.3 Flash
90.1%#9/98 open
IndependentEpoch AI · Aug 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
70.7#15/19 open
IndependentLiveBench · Jun 2026
GLM 5.3 Flash
79.0#5/19 open
IndependentLiveBench · Jun 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
74.7#16/19 open
IndependentLiveBench · Jun 2026
GLM 5.3 Flash
77.6#15/19 open
IndependentLiveBench · Jun 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
86.7%#18/86 open
IndependentEpoch AI · Jun 2026
GLM 5.3 Flash
93.9%#9/86 open
IndependentEpoch AI · Aug 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
88.7#6/19 open
IndependentLiveBench · Jun 2026
GLM 5.3 Flash
81.2#15/19 open
IndependentLiveBench · Jun 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
40.3%#29/66 open
Lab-reportedEpoch AI · Jun 2026
GLM 5.3 Flash
51.6%#6/66 open
Lab-reportedEpoch AI · Aug 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
13.6%#12/12 open
Lab-reportedEpoch AI · Jun 2026
GLM 5.3 Flash
31.8%#4/12 open
Lab-reportedEpoch AI · Aug 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
22.7%#14/16 open
Lab-reportedEpoch AI · Jun 2026
GLM 5.3 Flash
52.8%#3/16 open
Lab-reportedEpoch AI · Aug 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
3.1%#24/66 open
Lab-reportedEpoch AI · Jun 2026
GLM 5.3 Flash
15.4%#7/66 open
Lab-reportedEpoch AI · Aug 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
43.6#13/15 open
IndependentLiveBench · Sep 2026
GLM 5.3 Flash
80.6#5/15 open
IndependentLiveBench · Sep 2026
23 more boards (other shared and single-model boards)
NVIDIA Nemotron 3 Ultra 550B A55B BF16
11.2#14/15 open
IndependentLiveBench · Sep 2026
GLM 5.3 Flash
28.4#6/15 open
IndependentLiveBench · Sep 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
74.7#11/15 open
IndependentLiveBench · Sep 2026
GLM 5.3 Flash
77.6#10/15 open
IndependentLiveBench · Sep 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
20.0%#7/18 open
IndependentEpoch AI · Jun 2026
GLM 5.3 Flash
8.0%#15/18 open
IndependentEpoch AI · Aug 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
2.0%#23/26 open
Lab-reportedEpoch AI · Jun 2026
GLM 5.3 Flash
21.0%#12/26 open
Lab-reportedEpoch AI · Aug 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
1426.0#27/187 open
ArenaLMArena · Oct 2026
GLM 5.3 Flash
1473.8#6/187 open
ArenaLMArena · Oct 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
0.0#14/15 open
IndependentLiveBench · Sep 2026
GLM 5.3 Flash
84.0#2/15 open
IndependentLiveBench · Sep 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
54.5#13/15 open
IndependentLiveBench · Sep 2026
GLM 5.3 Flash
76.4#6/15 open
IndependentLiveBench · Sep 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
58.6#12/15 open
IndependentLiveBench · Sep 2026
GLM 5.3 Flash
77.2#4/15 open
IndependentLiveBench · Sep 2026
NVIDIA Nemotron 3 Ultra 550B A55B BF16
43.2#14/15 open
IndependentLiveBench · Sep 2026
GLM 5.3 Flash
70.1#8/15 open
IndependentLiveBench · Sep 2026
Only GLM 5.3 Flash (11)
- FrontierMath55.8%
- LMArena WebDev1605.5
- ARC-AGI-265.8%
- ARC-AGI91.0%
- FrontierMath Tier 417.1%
- DeepSWE63.4%
- Chess Puzzles21.0%
- ALE-Bench303.6
- CursorBench36.8%
- FrontierSWE18.1%
- Surface Evolver Bench52.5%
VRAM by quantization
Memory to load the model and 2K context; below it, the total at 32K and 128K context. Lighter side in bold.
Q2_K
NVIDIA Nemotron 3 Ultra 550B A55B BF16
262 GB~238.2 GB file
32K 280 GB · 128K 338 GB
GLM 5.3 Flash
138 GB114.2 GB file
32K 161 GB · 128K 234 GB
Q3_K_M
NVIDIA Nemotron 3 Ultra 550B A55B BF16
301 GB274.0 GB file
32K 319 GB · 128K 376 GB
GLM 5.3 Flash
158 GB149.1 GB file
32K 181 GB · 128K 254 GB
Q4_K_M
NVIDIA Nemotron 3 Ultra 550B A55B BF16
370 GB359.2 GB file
32K 388 GB · 128K 446 GB
GLM 5.3 Flash
195 GB188.7 GB file
32K 217 GB · 128K 290 GB
Q5_K_M
NVIDIA Nemotron 3 Ultra 550B A55B BF16
439 GB426.5 GB file
32K 457 GB · 128K 515 GB
GLM 5.3 Flash
231 GB~228.9 GB file
32K 253 GB · 128K 326 GB
Q6_K
NVIDIA Nemotron 3 Ultra 550B A55B BF16
509 GB460.7 GB file
32K 527 GB · 128K 585 GB
GLM 5.3 Flash
267 GB~265.1 GB file
32K 290 GB · 128K 362 GB
Q8_0
NVIDIA Nemotron 3 Ultra 550B A55B BF16
617 GB584.3 GB file
32K 635 GB · 128K 692 GB
GLM 5.3 Flash
323 GB341.0 GB file
32K 346 GB · 128K 418 GB
11 more quants
IQ2_XXS
NVIDIA Nemotron 3 Ultra 550B A55B BF16
170 GB193.8 GB file
32K 188 GB · 128K 245 GB
GLM 5.3 Flash
90.2 GB101.8 GB file
32K 113 GB · 128K 185 GB
IQ2_XS
NVIDIA Nemotron 3 Ultra 550B A55B BF16
185 GB169.5 GB file
32K 203 GB · 128K 261 GB
GLM 5.3 Flash
not listed
IQ2_S
NVIDIA Nemotron 3 Ultra 550B A55B BF16
not listed
GLM 5.3 Flash
102 GB113.6 GB file
32K 125 GB · 128K 197 GB
IQ2_M
NVIDIA Nemotron 3 Ultra 550B A55B BF16
208 GB194.0 GB file
32K 226 GB · 128K 284 GB
GLM 5.3 Flash
not listed
IQ3_XXS
NVIDIA Nemotron 3 Ultra 550B A55B BF16
239 GB223.3 GB file
32K 257 GB · 128K 315 GB
GLM 5.3 Flash
126 GB120.4 GB file
32K 149 GB · 128K 221 GB
IQ3_S
NVIDIA Nemotron 3 Ultra 550B A55B BF16
262 GB250.5 GB file
32K 280 GB · 128K 338 GB
GLM 5.3 Flash
not listed
IQ4_XS
NVIDIA Nemotron 3 Ultra 550B A55B BF16
331 GB286.1 GB file
32K 349 GB · 128K 407 GB
GLM 5.3 Flash
175 GB156.8 GB file
32K 197 GB · 128K 270 GB
IQ4_NL
NVIDIA Nemotron 3 Ultra 550B A55B BF16
347 GB294.2 GB file
32K 365 GB · 128K 423 GB
GLM 5.3 Flash
not listed
Q4_K_S
NVIDIA Nemotron 3 Ultra 550B A55B BF16
347 GB327.7 GB file
32K 365 GB · 128K 423 GB
GLM 5.3 Flash
not listed
Q5_K_S
NVIDIA Nemotron 3 Ultra 550B A55B BF16
424 GB391.7 GB file
32K 442 GB · 128K 500 GB
GLM 5.3 Flash
not listed
BF16
NVIDIA Nemotron 3 Ultra 550B A55B BF16
1233 GB1099.0 GB file
32K 1251 GB · 128K 1309 GB
GLM 5.3 Flash
644 GB641.6 GB file
32K 667 GB · 128K 740 GB
NVIDIA Nemotron 3 Ultra 550B A55B BF16
Ollama · Q4_K_M
ollama run hf.co/unsloth/NVIDIA-Nemotron-3-Ultra-550B-A55B-GGUF:Q4_K_MGLM 5.3 Flash
Ollama · Q4_K_M
ollama run hf.co/batiai/GLM-5.3-Flash-GGUF:Q4_K_M| Spec | NVIDIA Nemotron 3 Ultra 550B A55B BF16 | GLM 5.3 Flash |
|---|---|---|
| Publisher | NVIDIA | Z.ai |
| Parameters | 560.5B | 321.3B |
| Active parameters | 57B per token | 18B per token |
| Architecture | NemotronHForCausalLM | Glm5NextForConditionalGeneration |
| Context | 256K tokens | 1M tokens |
| Modalities | Chat, Function-calling | Vision, Function-calling |
| License | Other | MIT |
| Released | Jun 2026 | Aug 2026 |
Frequently Asked Questions
Which is better, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GLM 5.3 Flash?
GLM 5.3 Flash leads llmrun Score 124.2 to 109.9; neither fits 24 GB. Choose NVIDIA Nemotron 3 Ultra 550B A55B BF16 for also does chat; choose GLM 5.3 Flash for higher llmrun Score and stronger at agents.
Which needs less VRAM, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GLM 5.3 Flash?
At Q4_K_M, NVIDIA Nemotron 3 Ultra 550B A55B BF16 requires 370.0 GB while GLM 5.3 Flash needs 194.6 GB, making GLM 5.3 Flash the easier model to run on your local setup.
Can I run NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GLM 5.3 Flash on a 16 GB GPU?
NVIDIA Nemotron 3 Ultra 550B A55B BF16 does not fit (smallest quant needs 178 GB); GLM 5.3 Flash does not fit (smallest quant needs 100.7 GB).
Which has a longer context window, NVIDIA Nemotron 3 Ultra 550B A55B BF16 or GLM 5.3 Flash?
NVIDIA Nemotron 3 Ultra 550B A55B BF16 supports 262,144 tokens and GLM 5.3 Flash supports 1,048,576 tokens.