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Nemotron 3 Ultra 550b A55b vs xAI: Grok 4.5

Summary

Nemotron 3 Ultra 550b A55b (medium) vs Grok 4.5 (medium) benchmark comparison: Grok 4.5 (medium) leads on average score with 8.3 vs 8.1. Nemotron 3 Ultra 550b A55b (medium) has the lower benchmark cost at $0.158 vs $1.696. Nemotron 3 Ultra 550b A55b (medium) is faster at 15.05s vs 62.63s, with pass rates of 69.8% vs 77.8%.

Recommended model: Nemotron 3 Ultra 550b A55b (medium) - Its score stays close to the best score here (8.1 vs 8.3), while costing about 10.7x less than Grok 4.5 (medium).

Last updated at: 2026-07-08

Metric Nemotron 3 Ultra 550b A55b Nemotron 3 Ultra 550b A55b medium Release: 2026-06-04 Free Available Grok 4.5 Grok 4.5 medium Release: 2026-07-08
Score 8.1 8.3
Rank #27 #23
Reliability 9.7 9.9
Consistency 8.8 8.9
Tests Correct
Attempt pass rate 69.8% 77.8%
Flaky tests 3 3
Total Runs 63 63
Cost per result 0.000 11.304
Total Cost $0.158 $1.696
Input Price $0.500 / 1M $2.000 / 1M
Output Price $2.200 / 1M $6.000 / 1M
Total Input Tokens 46,813 53,500
Output Tokens 18,002 1,621
Reasoning Tokens 53,091 263,127
Response Time (avg) 15.05s 62.63s
Response Time (max) 43.93s 436.38s
Response Time (total) 316.09s 1315.20s

Generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#27 Nemotron 3 Ultra 550b A55b

medium
Invalid SVG
Cost
$0.000
Time
300.0s
Tokens
0 tok

#23 xAI: Grok 4.5

medium
Cost
$0.044
Time
59.4s
Tokens
7,512 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Anti-AI Tricks Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 10.0 10.0 100.0% 0 8.62s 780 835 1,485
Grok 4.5 10.0 10.0 100.0% 0 23.50s 2,991 147 4,018
Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 8.4 7.4 88.9% 1 26.53s 7,686 2,854 17,725
Grok 4.5 7.6 7.2 77.8% 1 155.69s 9,579 390 104,634
Combined Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 9.8 10.0 100.0% 0 43.93s 17,574 1,040 3,590
Grok 4.5 10.0 10.0 100.0% 0 15.65s 15,084 261 4,254
Data parsing and extraction Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 10.0 10.0 100.0% 0 5.68s 7,989 473 1,285
Grok 4.5 10.0 10.0 100.0% 0 6.29s 8,937 225 3,657
Domain specific Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 3.5 4.4 33.3% 2 24.90s 858 11,169 16,249
Grok 4.5 2.9 7.2 11.1% 1 198.89s 2,212 11 121,922
General Intelligence Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 3.7 9.5 0.0% 0 2.52s 360 70 235
Grok 4.5 6.5 3.4 66.7% 1 12.84s 1,077 71 2,384
Instructions following Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 9.8 10.0 100.0% 0 6.35s 765 182 1,243
Grok 4.5 9.8 10.0 100.0% 0 6.06s 1,857 57 2,728
Puzzle Solving Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 5.5 9.9 33.3% 0 3.54s 792 771 2,055
Grok 4.5 10.0 10.0 100.0% 0 7.75s 2,430 254 3,641
Tool Calling Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 10.0 10.0 100.0% 0 7.72s 9,781 304 984
Grok 4.5 10.0 10.0 100.0% 0 6.57s 8,544 192 968
Trivia Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Nemotron 3 Ultra 550b A55b 3.0 10.0 0.0% 0 38.47s 228 304 8,240
Grok 4.5 3.0 10.0 0.0% 0 74.44s 789 13 14,921

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