Llama 3.1 Instruct 405B vs Llama 3.1 Nemotron Ultra 253B V1
Wins 2 of 6 areas
Facts · Long documents
Wins 1 of 6 areas
Reasoning
Llama 3.1 Instruct 405B wins more areas, narrowly.Llama 3.1 Nemotron Ultra 253B V1 is better at reasoning.
Scores updated · 19 tests both models report · How we compare
Where each one wins
Tests won in each of the six areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- FactsGetting facts right instead of making them up20Llama 3.1 Instruct 405B2 of 2 tests
- Long documentsFinding answers in very long texts10Llama 3.1 Instruct 405B1 of 1 test
- ReasoningHard problems that need careful thinking02Llama 3.1 Nemotron Ultra 253B V12 of 3 tests · 1 tie
- CodingWriting and fixing software11Even1 each
- AgentsCarrying out multi-step tasks on its own00Even0 each · 1 tie
- Following instructionsDoing exactly what it is asked00Even0 each · 1 tie
Agents, long documents and following instructions rest on a single test each.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Llama 3.1 Instruct 405B pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+28.8points ahead
- Reasons across sets of long documentsAA-LCR+17.6points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+4.5points ahead
Where Llama 3.1 Nemotron Ultra 253B V1 pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+21.3points ahead
- Code for real scientific research problemsSciCode+4.8points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+3.4points ahead
Every test, side by side
All 19 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingEven
- SciCodeLlama 3.1 Nemotron Ultra 253B V1 by 4.829.934.7+4.8
- Terminal-Bench HardLlama 3.1 Instruct 405B by 4.56.82.3+4.5
ReasoningLlama 3.1 Nemotron Ultra 253B V1
- GPQA DiamondLlama 3.1 Nemotron Ultra 253B V1 by 21.351.572.8+21.3
- Humanity's Last ExamLlama 3.1 Nemotron Ultra 253B V1 by 3.447.4+3.4
- CritPttie00tie
FactsLlama 3.1 Instruct 405B
- AA-Omniscience · Non-hallucinationLlama 3.1 Instruct 405B by 28.847.618.8+28.8
- AA-Omniscience · AccuracyLlama 3.1 Instruct 405B by 3.123.220.1+3.1
Long documentsLlama 3.1 Instruct 405B
- AA-LCRLlama 3.1 Instruct 405B by 17.625.37.7+17.6
Other results9 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- LiveCodeBenchLlama 3.1 Nemotron Ultra 253B V1 by 38.627.766.3+38.6
- AA-OmniscienceLlama 3.1 Instruct 405B by 27.8-17.1-44.9+27.8
- MATH-500 (EM)Llama 3.1 Nemotron Ultra 253B V1 by 23.273.897+23.2
- τ²-Bench Telecom (AA run)Llama 3.1 Instruct 405B by 7.61911.4+7.6
- BFCL v2Llama 3.1 Instruct 405B by 781.174.1+7
- AA Agentic IndexLlama 3.1 Instruct 405B by 2.56.33.8+2.5
- Artificial Analysis Coding IndexLlama 3.1 Instruct 405B by 1.414.513.1+1.4
- IFEvaltie88.689.5tie
- AA Intelligencetie7.37.5tie
Questions people ask
Which is better, Llama 3.1 Instruct 405B or Llama 3.1 Nemotron Ultra 253B V1?
Llama 3.1 Instruct 405B wins two of the six areas where both have results: facts and long documents. Llama 3.1 Nemotron Ultra 253B V1 wins reasoning. They are level on coding, agents and following instructions.
Which is better for coding?
Neither. They win 1 coding test each of the 2 both models report.
How do you compare the two?
We use the 19 benchmark tests both models have published scores on. The verdict counts the 10 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 9 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.