Model comparison
Claude Opus 4.5 Thinking vs Nemotron 3 Ultra
Head-to-head evidence from 13 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Verified leaderboard positions: Claude Opus 4.5 Thinking unranked; Nemotron 3 Ultra #24
BenchAlign evidence: Claude Opus 4.5 Thinking estimated; Nemotron 3 Ultra not scored. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Opus 4.5 Thinking and Nemotron 3 Ultra share 13 comparable benchmark results. 0 of 8 categories are comparable. 4 results are unique to Claude Opus 4.5 Thinking; 26 to Nemotron 3 Ultra.
Updated July 16, 2026- Shared results
- 13
- Claude Opus 4.5 Thinking only
- 4
- Nemotron 3 Ultra only
- 26
- Comparable categories
- 0 / 8
Benchmark data for Claude Opus 4.5 Thinking and Nemotron 3 Ultra is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 13 shared benchmark results across 6 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Nemotron 3 Ultra has the larger context window at 1M, compared with 200K for Claude Opus 4.5 Thinking.
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 4.5 Thinking | Δ | Nemotron 3 Ultra |
|---|---|---|---|
| Agentic | Claude Opus 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra51.3 |
| Coding | Claude Opus 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra58.3 |
| Reasoning | Claude Opus 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra61.9 |
| Knowledge | Claude Opus 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra54.2 |
| Multilingual | Claude Opus 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra83.0 |
| Inst. Following | Claude Opus 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra81.7 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Opus 4.5 Thinking | Nemotron 3 Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Opus 4.5 ThinkingNot available | Nemotron 3 Ultra$0 input / $0 output | A complete price comparison is not available. |
| Generation speedtokens per second | Claude Opus 4.5 ThinkingNot available | Nemotron 3 UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Opus 4.5 ThinkingNot available | Nemotron 3 UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Opus 4.5 Thinking200K | Nemotron 3 Ultra1M | Nemotron 3 Ultra lists the larger context window. |
Benchmark Deep Dive
Agentic12 benchmarks
| Benchmark | Claude Opus 4.5 Thinking | Nemotron 3 Ultra | Result |
|---|---|---|---|
| τ²-bench resultsSource | 89.5% | 83.3% | Claude Opus 4.5 Thinking leads |
| Terminal-Bench 2.0Source | — | 56.4% | Not comparable |
| PinchBenchSource | — | 90.0% | Not comparable |
| BrowseCompSource | — | 44.4% | Not comparable |
| τ³-bench resultsSource | — | 70.9% | Not comparable |
| GDPval-AASource | — | 33.2% | Not comparable |
| HLE w/ toolsSource | — | 37.4% | Not comparable |
| AA Agentic IndexSource | — | 27.4% | Not comparable |
| GDPval-AASource | — | 1164 | Not comparable |
| AA BriefcaseSource | — | 870 | Not comparable |
| AA EnterpriseOps-GymSource | — | 28.9% | Not comparable |
| AA Harvey LABSource | — | 3.3% | Not comparable |
Coding9 benchmarks
| Benchmark | Claude Opus 4.5 Thinking | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Vibe Code BenchSource | 20.63% | — | Not comparable |
| Terminal-Bench HardSource | 47.0% | 36.4% | Claude Opus 4.5 Thinking leads |
| AA-SciCodeSource | 49.5% | 39.9% | Claude Opus 4.5 Thinking leads |
| SWE-bench VerifiedSource | — | 71.9% | Not comparable |
| SWE MultilingualSource | — | 67.7% | Not comparable |
| LiveCodeBench v6Source | — | 89.0% | Not comparable |
| SciCodeSource | — | 44.6% | Not comparable |
| Terminal-Bench 2.0Source | — | 56.4% | Not comparable |
| AA Coding IndexSource | — | 49.3% | Not comparable |
Reasoning3 benchmarks
Knowledge13 benchmarks
| Benchmark | Claude Opus 4.5 Thinking | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 40.8% | 37.8% | Claude Opus 4.5 Thinking leads |
| AA-GPQA DiamondSource | 86.6% | 86.7% | Nemotron 3 Ultra leads |
| AA-HLESource | 28.4% | 26.6% | Claude Opus 4.5 Thinking leads |
| AA-Omniscience IndexSource | 13.3% | -0.8% | Claude Opus 4.5 Thinking leads |
| AA-Omniscience AccuracySource | 45.7% | 21.6% | Claude Opus 4.5 Thinking leads |
| AA-Omniscience Hallucination RateSource | 59.8% | 28.5% | Nemotron 3 Ultra leads |
| AA MMLU-ProSource | 89.5% | — | Not comparable |
| GPQASource | — | 87% | Not comparable |
| GPQA-DSource | — | 87.0% | Not comparable |
| HLESource | — | 26.7% | Not comparable |
| HLE w/o toolsSource | — | 26.7% | Not comparable |
| MMLU-ProSource | — | 86.8% | Not comparable |
| AA Openness IndexSource | — | 83.3% | Not comparable |
Multilingual2 benchmarks
Multimodal2 benchmarks
Frequently Asked Questions (3)
Can I compare Claude Opus 4.5 Thinking and Nemotron 3 Ultra on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Claude Opus 4.5 Thinking and Nemotron 3 Ultra today?
Nemotron 3 Ultra: $0.00 input / $0.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
Related Comparisons
The AI models change fast. We track them for you.
A weekly brief for engineers and researchers covering new models, ranking shifts, and pricing changes.
Free. No spam. Unsubscribe anytime.