Claude Sonnet 4.6 vs Nemotron 3 Ultra 550B A55B
Wins 3 of 7 areas
Coding · Agents · Reasoning
Wins 2 of 7 areas
Math · Following instructions
Claude Sonnet 4.6 wins more areas, narrowly.Nemotron 3 Ultra 550B A55B is cheaper and better at following instructions.
Scores updated · 34 tests both models report · How we compare
Where each one wins
Tests won in each of the seven 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.
- CodingWriting and fixing software70Claude Sonnet 4.67 of 7 tests
- AgentsCarrying out multi-step tasks on its own50Claude Sonnet 4.65 of 5 tests
- ReasoningHard problems that need careful thinking20Claude Sonnet 4.62 of 4 tests · 2 ties
- Following instructionsDoing exactly what it is asked02Nemotron 3 Ultra 550B A55B2 of 2 tests
- MathCompetition and research-level math01Nemotron 3 Ultra 550B A55B1 of 1 test
- FactsGetting facts right instead of making them up11Even1 each · 1 tie
- Long documentsFinding answers in very long texts00Even0 each · 1 tie
Math and long documents rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Nemotron 3 Ultra 550B A55B costs 82% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Claude Sonnet 4.6 pulls ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+30.3points ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+20.2points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+18.3points ahead
Where Nemotron 3 Ultra 550B A55B pulls ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+24.8points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+18.7points ahead
- Follows detailed instructions exactlyLiveBench · Instruction Following+10.3points ahead
Every test, side by side
All 34 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Sonnet 4.6
- Terminal-Bench 2.1Claude Sonnet 4.6 by 17.371.253.9+17.3
- Terminal-Bench HardClaude Sonnet 4.6 by 16.65336.4+16.6
- SciCodeClaude Sonnet 4.6 by 9.850.140.3+9.8
- SWE-bench VerifiedClaude Sonnet 4.6 by 8.979.670.7+8.9
- LiveBench · CodingClaude Sonnet 4.6 by 8.679.370.7+8.6
- SWE-bench ProClaude Sonnet 4.6 by 8.458.149.7+8.4
- LiveBench · Agentic CodingClaude Sonnet 4.6 by 3.942.638.7+3.9
AgentsClaude Sonnet 4.6
- BrowseCompClaude Sonnet 4.6 by 30.374.744.4+30.3
- τ-Bench V3 · BankingClaude Sonnet 4.6 by 20.234.414.2+20.2
- MCP AtlasClaude Sonnet 4.6 by 16.661.344.7+16.6
- GDPValClaude Sonnet 4.6 by 10.936.625.7+10.9
- Terminal-Bench 4.0Claude Sonnet 4.6 by 2.530.5+2.5
ReasoningClaude Sonnet 4.6
- LiveBench · ReasoningClaude Sonnet 4.6 by 10.184.874.7+10.1
- Humanity's Last ExamClaude Sonnet 4.6 by 5.233.628.4+5.2
- GPQA Diamondtie87.586.7tie
- CritPttie3.13.1tie
FactsEven
- AA-Omniscience · Non-hallucinationNemotron 3 Ultra 550B A55B by 18.751.670.3+18.7
- AA-Omniscience · AccuracyClaude Sonnet 4.6 by 18.340.922.6+18.3
- SimpleQA Verifiedtie32.832.4tie
MathNemotron 3 Ultra 550B A55B
- LiveBench · MathematicsNemotron 3 Ultra 550B A55B by 1.78788.7+1.7
Following instructionsNemotron 3 Ultra 550B A55B
- IFBenchNemotron 3 Ultra 550B A55B by 24.856.681.4+24.8
- LiveBench · Instruction FollowingNemotron 3 Ultra 550B A55B by 10.363.273.5+10.3
Other results11 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.
- GDPval-AA v2Claude Sonnet 4.6 by 247 rating points13951148+247 rating
- livebench_data_analysisClaude Sonnet 4.6 by 23.57854.5+23.5
- Artificial Analysis Coding IndexClaude Sonnet 4.6 by 13.76349.3+13.7
- Finance Agent v2Claude Sonnet 4.6 by 13.55137.5+13.5
- AA-OmniscienceClaude Sonnet 4.6 by 12.612.2-0.4+12.6
- AA Agentic IndexClaude Sonnet 4.6 by 11.433.121.7+11.4
- Finance AgentClaude Sonnet 4.6 by 9.663.353.7+9.6
- HLE (with tools)Claude Sonnet 4.6 by 9.446.837.4+9.4
- τ²-Bench Telecom (AA run)Nemotron 3 Ultra 550B A55B by 7.675.783.3+7.6
- AA IntelligenceClaude Sonnet 4.6 by 7.230.122.9+7.2
- livebench_languageClaude Sonnet 4.6 by 5.376.170.8+5.3
Questions people ask
Which is better, Claude Sonnet 4.6 or Nemotron 3 Ultra 550B A55B?
Claude Sonnet 4.6 wins three of the seven areas where both have results: coding, agents and reasoning. Nemotron 3 Ultra 550B A55B wins math and following instructions, and costs 82% less. They are level on facts and long documents.
Which is better for coding?
Claude Sonnet 4.6. It wins 7 of the 7 coding tests both models report; Nemotron 3 Ultra 550B A55B wins none.
Which is cheaper?
Claude Sonnet 4.6 costs $3.00 per million input tokens and $15.00 per million output tokens; Nemotron 3 Ultra 550B A55B costs $0.60 and $2.70. That makes Nemotron 3 Ultra 550B A55B about 82% cheaper for the same work.
How do you compare the two?
We use the 34 benchmark tests both models have published scores on. The verdict counts the 23 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 11 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.