Which is better, Claude Opus 4.5 or Nemotron 3 Ultra 550B A55B?

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Claude Opus 4.5 vs Nemotron 3 Ultra 550B A55B

38 SHARED BENCHMARKS

Across 38 shared benchmarks, Claude Opus 4.5 scores higher on 27 and Nemotron 3 Ultra 550B A55B on 10, with 1 level. The widest gap is livebench_agentic_coding, where Claude Opus 4.5 scores 39.7 against 16.3. Nemotron 3 Ultra 550B A55B is the cheaper of the two on tracked API pricing ($0.68 against $5.00 per million input tokens).

ANTHROPICVSNVIDIA38 SHARED27–10 HEAD-TO-HEAD

BenchmarkClaude Opus 4.5MARGINNemotron 3 Ultra 550B A55B

AA Agentic Index59.627.5

AA Intelligence41.938.3

AA-LCR7671

AA-Omniscience14-0.4

aime_202695.194.2

Artificial Analysis Coding Index47.849.3

browsecomp3744.4

BrowseComp (context management)59.263

critpt4.63.1

finance_agent55.253.7

gdpval47.346.7

GPQA Diamond8787

HLE30.837.4

HLE (with tools)43.437.4

hmmt_feb_202685.378.8

IFBench5881.7

imo_answer_bench8492.3

livebench_agentic_coding39.716.3

livebench_coding79.770.7

livebench_data_analysis74.454.5

livebench_instruction_following62.573.5

livebench_language81.370.8

livebench_math90.488.7

livebench_reasoning80.174.7

LiveCodeBench v684.889

longbench_v264.461.9

MCP Atlas69.844.7

MMLU-Pro9086.8

multichallenge5963.8

OmniScience Accuracy46.622.6

OmniScience Non-Hallucination3970.3

scicode5044.6

simplebench6241.7

simpleqa_verified45.732.4

SWE-bench Multilingual77.567.7

SWE-bench Verified81.570.7

Terminal-Bench Hard4736.4

τ²-Bench Telecom (AA run)89.583.3

Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing. Quoted rates are the price-setter row we currently track for each model — its direct or vendor-official listing where one exists (anthropic-official, direct), otherwise the lowest tracked offer.