Model comparison
Claude Sonnet 4.5 Thinking vs Nemotron 3 Ultra
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Verified leaderboard positions: Claude Sonnet 4.5 Thinking unranked; Nemotron 3 Ultra #24
Evidence parity. Claude Sonnet 4.5 Thinking and Nemotron 3 Ultra share 1 comparable benchmark result. 0 of 8 categories are comparable. 1 result is unique to Claude Sonnet 4.5 Thinking; 38 to Nemotron 3 Ultra.
Updated July 16, 2026- Shared results
- 1
- Claude Sonnet 4.5 Thinking only
- 1
- Nemotron 3 Ultra only
- 38
- Comparable categories
- 0 / 8
Benchmark data for Claude Sonnet 4.5 Thinking and Nemotron 3 Ultra is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 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 Sonnet 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 Sonnet 4.5 Thinking | Δ | Nemotron 3 Ultra |
|---|---|---|---|
| Agentic | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra51.3 |
| Coding | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra58.3 |
| Reasoning | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra61.9 |
| Knowledge | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra54.2 |
| Multilingual | Claude Sonnet 4.5 ThinkingNot measured | MarginNo overlap | Nemotron 3 Ultra83.0 |
| Inst. Following | Claude Sonnet 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 Sonnet 4.5 Thinking | Nemotron 3 Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Sonnet 4.5 ThinkingNot available | Nemotron 3 Ultra$0 input / $0 output | A complete price comparison is not available. |
| Generation speedtokens per second | Claude Sonnet 4.5 ThinkingNot available | Nemotron 3 UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Sonnet 4.5 ThinkingNot available | Nemotron 3 UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Sonnet 4.5 Thinking200K | Nemotron 3 Ultra1M | Nemotron 3 Ultra lists the larger context window. |
Benchmark Deep Dive
Agentic12 benchmarks
| Benchmark | Claude Sonnet 4.5 Thinking | Nemotron 3 Ultra | Result |
|---|---|---|---|
| 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 |
| τ²-bench resultsSource | — | 83.3% | 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 Sonnet 4.5 Thinking | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Vibe Code BenchSource | 22.62% | — | Not comparable |
| 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 |
| Terminal-Bench HardSource | — | 36.4% | Not comparable |
| AA-SciCodeSource | — | 39.9% | Not comparable |
Reasoning3 benchmarks
Knowledge12 benchmarks
| Benchmark | Claude Sonnet 4.5 Thinking | Nemotron 3 Ultra | Result |
|---|---|---|---|
| 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-Omniscience AccuracySource | — | 21.6% | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 37.8% | Not comparable |
| AA-GPQA DiamondSource | — | 86.7% | Not comparable |
| AA-HLESource | — | 26.6% | Not comparable |
| AA-Omniscience IndexSource | — | -0.8% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 28.5% | Not comparable |
| AA Openness IndexSource | — | 83.3% | Not comparable |
Multilingual1 benchmarks
| Benchmark | Claude Sonnet 4.5 Thinking | Nemotron 3 Ultra | Result |
|---|---|---|---|
| MMLU-ProXSource | — | 83% | Not comparable |
Multimodal1 benchmarks
| Benchmark | Claude Sonnet 4.5 Thinking | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Design Arena WebsiteSource | 1224 | 1132 | Claude Sonnet 4.5 Thinking leads |
Frequently Asked Questions (3)
Can I compare Claude Sonnet 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 Sonnet 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.
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