Model comparison
Claude Opus 5 vs Nemotron 3 Ultra
Head-to-head evidence from 20 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Opus 5 #1 (Estimated); Nemotron 3 Ultra #157 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Opus 5 and Nemotron 3 Ultra share 20 comparable benchmark results. 4 of 8 categories are comparable. 59 results are unique to Claude Opus 5; 18 to Nemotron 3 Ultra.
Updated July 24, 2026- Shared results
- 20
- Claude Opus 5 only
- 59
- Nemotron 3 Ultra only
- 18
- Comparable categories
- 4 / 8
Pick Claude Opus 5 if you want the stronger benchmark profile. Nemotron 3 Ultra only becomes the better choice if you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 20 shared benchmark results across 4 evidence categories; 4 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Opus 5 is clearly ahead on the BenchAlign aggregate, 85.88 to 43.67. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Opus 5's sharpest advantage is in agentic, where it averages 90.8 against 51.3. The single biggest benchmark swing on the page is BrowseComp, 90.8% to 44.4%.
Claude Opus 5 is also the more expensive model on tokens at $5.00 input / $25.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Nemotron 3 Ultra. That is roughly Infinityx on output cost alone.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Opus 5 | Δ | Nemotron 3 Ultra |
|---|---|---|---|
| Agentic | Claude Opus 590.8 | Margin← 39.5 | Nemotron 3 Ultra51.3 |
| Coding | Claude Opus 589.5 | Margin← 31.2 | Nemotron 3 Ultra58.3 |
| Reasoning | Claude Opus 590.4 | Margin← 28.5 | Nemotron 3 Ultra61.9 |
| Knowledge | Claude Opus 564.7 | Margin← 10.9 | Nemotron 3 Ultra53.8 |
| Multilingual | Claude Opus 5Not measured | MarginNo overlap | Nemotron 3 Ultra83.0 |
| Multimodal | Claude Opus 566.9 | MarginNo overlap | Nemotron 3 UltraNot measured |
| Inst. Following | Claude Opus 5Not measured | MarginNo overlap | Nemotron 3 Ultra81.7 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
BrowseComp
AgenticA 90.8%B 44.4%Winner: Claude Opus 5Δ 46.4BrowseComp: Claude Opus 5 scored 90.8%; Nemotron 3 Ultra scored 44.4%. Claude Opus 5 wins this benchmark. - Source ↗
HLE
KnowledgeA 64.7%B 26.7%Winner: Claude Opus 5Δ 38HLE: Claude Opus 5 scored 64.7%; Nemotron 3 Ultra scored 26.7%. Claude Opus 5 wins this benchmark. - Source ↗
SWE-bench Verified
CodingA 96%B 71.9%Winner: Claude Opus 5Δ 24.1SWE-bench Verified: Claude Opus 5 scored 96%; Nemotron 3 Ultra scored 71.9%. Claude Opus 5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Opus 5 | Nemotron 3 Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Opus 5$5 input / $25 output | Nemotron 3 Ultra$0 input / $0 output | Nemotron 3 Ultra has the lower combined listed price. |
| Generation speedtokens per second | Claude Opus 5Not available | Nemotron 3 UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Opus 5Not available | Nemotron 3 UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Opus 5Not available | Nemotron 3 Ultra1M | A complete context comparison is not available. |
Benchmark Deep Dive
AgenticClaude Opus 5 wins31 benchmarks
| Benchmark | Claude Opus 5 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| FrontierBench v0.1Source | 43.3% | — | Not comparable |
| BrowseCompSource | 90.8% | 44.4% | Claude Opus 5 leads |
| HLE w/ toolsSource | 64.7% | 37.4% | Claude Opus 5 leads |
| DeepSearchQASource | 95.0% | — | Not comparable |
| DRACOSource | 88.6% | — | Not comparable |
| BrowseComp (10-agent, prerelease)Source | 93.6% | — | Not comparable |
| OSWorld 2.0Source | 70.6% | — | Not comparable |
| MCP AtlasSource | 85.8% | — | Not comparable |
| MCP-Atlas claim coverageSource | 89.1% | — | Not comparable |
| LAB all-pass (Anthropic harness)Source | 23.58% | — | Not comparable |
| LAB criterion-pass (Anthropic harness)Source | 93.74% | — | Not comparable |
| LAB all-pass (Harvey held-out)Source | 11.7% | — | Not comparable |
| LAB criterion-pass (Harvey held-out)Source | 94.1% | — | Not comparable |
| GDPval-AASource | 1861 | 1162 | Claude Opus 5 leads |
| Toolathlon-VerifiedSource | 80.6% | — | Not comparable |
| Toolathlon Verified Pass@3Source | 87.0% | — | Not comparable |
| Toolathlon Verified Pass³Source | 73.1% | — | Not comparable |
| Toolathlon Verified avg. turnsSource | 23.5 turns | — | Not comparable |
| AutomationBenchSource | 26.0% | — | Not comparable |
| AA Agentic IndexSource | 55.3% | 27.4% | Claude Opus 5 leads |
| GDPval-AASource | 68.0% | 33.1% | Claude Opus 5 leads |
| AA Tau3 BankingSource | 30.3% | — | Not comparable |
| AA BriefcaseSource | 1720 | 873 | Claude Opus 5 leads |
| aaTerminalBench21Source | 89.1% | — | Not comparable |
| Terminal-Bench 2.0Source | — | 56.4% | Not comparable |
| PinchBenchSource | — | 90.0% | Not comparable |
| τ³-bench resultsSource | — | 70.9% | Not comparable |
| τ²-bench resultsSource | — | 83.3% | Not comparable |
| AA EnterpriseOps-GymSource | — | 28.9% | Not comparable |
| AA Harvey LABSource | — | 81.7% | Not comparable |
| terminalBenchHardSource | — | 36.4% | Not comparable |
CodingClaude Opus 5 wins14 benchmarks
| Benchmark | Claude Opus 5 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 96% | 71.9% | Claude Opus 5 leads |
| SWE-bench ProSource | 79.2% | — | Not comparable |
| SWE MultilingualSource | 89.5% | 67.7% | Claude Opus 5 leads |
| SWE MultimodalSource | 59.4% | — | Not comparable |
| deepSweSource | 68.8% | — | Not comparable |
| FrontierCode 1.1 MainSource | 53.4% | — | Not comparable |
| FrontierCode 1.1 ExtendedSource | 63.6% | — | Not comparable |
| ProgramBench (episode 1)Source | 83.0% | — | Not comparable |
| ProgramBenchSource | 93.0% | — | Not comparable |
| cursorBench32Source | 70.0% | — | Not comparable |
| AA Coding IndexSource | 78.0% | 49.3% | Claude Opus 5 leads |
| AA-SciCodeSource | 55.7% | 39.9% | Claude Opus 5 leads |
| SciCodeSource | — | 44.6% | Not comparable |
| Terminal-Bench 2.0Source | — | 56.4% | Not comparable |
ReasoningClaude Opus 5 wins6 benchmarks
KnowledgeClaude Opus 5 wins25 benchmarks
| Benchmark | Claude Opus 5 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| HLESource | 64.7% | 26.7% | Claude Opus 5 leads |
| HLE w/o toolsSource | 56.3% | 26.7% | Claude Opus 5 leads |
| HealthBench (raw)Source | 67.1% | — | Not comparable |
| HealthBench (length-adjusted)Source | 57.8% | — | Not comparable |
| HealthBench ProfessionalSource | 59.8% | — | Not comparable |
| HealthBench Professional (raw)Source | 73.4% | — | Not comparable |
| BioMysteryBench (human-solvable)Source | 90.1% | — | Not comparable |
| BioMysteryBench (human-difficult)Source | 49.4% | — | Not comparable |
| SpatialBench VerifiedSource | 72.5% | — | Not comparable |
| SingleCellBenchSource | 60.6% | — | Not comparable |
| ProteinGym HardSource | 47.7% | — | Not comparable |
| Protein DesignSource | 42.5% | — | Not comparable |
| Organic chemistry V2Source | 61.6% | — | Not comparable |
| Protocols (troubleshooting)Source | 61.1% | — | Not comparable |
| Protocols (understanding)Source | 78.4% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 60.7% | 37.8% | Claude Opus 5 leads |
| AA-GPQA DiamondSource | 93.2% | 86.7% | Claude Opus 5 leads |
| AA-HLESource | 52.6% | 26.6% | Claude Opus 5 leads |
| AA-Omniscience IndexSource | 31.3% | -0.8% | Claude Opus 5 leads |
| AA-Omniscience AccuracySource | 54.2% | 21.6% | Claude Opus 5 leads |
| AA-Omniscience Hallucination RateSource | 50.1% | 28.5% | Nemotron 3 Ultra leads |
| GPQASource | — | 87% | Not comparable |
| GPQA-DSource | — | 87.0% | Not comparable |
| MMLU-ProSource | — | 86.8% | Not comparable |
| AA Openness IndexSource | — | 83.3% | Not comparable |
Math5 benchmarks
Multilingual4 benchmarks
Multimodal10 benchmarks
| Benchmark | Claude Opus 5 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Chartography (no tools)Source | 29.6% | — | Not comparable |
| Chartography (tools)Source | 83.0% | — | Not comparable |
| BenchCAD Vision2Code (no tools)Source | 0.366 | — | Not comparable |
| BenchCAD Vision2Code (tools)Source | 0.821 | — | Not comparable |
| GDP.pdf (no tools)Source | 83.4% | — | Not comparable |
| GDP.pdf (tools)Source | 85.5% | — | Not comparable |
| OfficeQASource | 78.1% | — | Not comparable |
| OfficeQA ProSource | 66.9% | — | Not comparable |
| AA-MMMU-ProSource | 84.7% | — | Not comparable |
| Design Arena WebsiteSource | — | 1129 | Not comparable |
Frequently Asked Questions (5)
Which is better, Claude Opus 5 or Nemotron 3 Ultra?
Claude Opus 5 is ahead on BenchLM's BenchAlign leaderboard, 85.88 to 43.67. The biggest single separator in this matchup is BrowseComp, where the scores are 90.8% and 44.4%.
Which is better for knowledge tasks, Claude Opus 5 or Nemotron 3 Ultra?
Claude Opus 5 has the edge for knowledge tasks in this comparison, averaging 64.7 versus 53.8. Inside this category, HLE is the benchmark that creates the most daylight between them.
Which is better for coding, Claude Opus 5 or Nemotron 3 Ultra?
Claude Opus 5 has the edge for coding in this comparison, averaging 89.5 versus 58.3. Inside this category, AA Coding Index is the benchmark that creates the most daylight between them.
Which is better for reasoning, Claude Opus 5 or Nemotron 3 Ultra?
Claude Opus 5 has the edge for reasoning in this comparison, averaging 90.4 versus 61.9. Inside this category, CritPt is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Claude Opus 5 or Nemotron 3 Ultra?
Claude Opus 5 has the edge for agentic tasks in this comparison, averaging 90.8 versus 51.3. Inside this category, AA Briefcase is the benchmark that creates the most daylight between them.