Model comparison
Composer 2 vs Nemotron 3 Ultra
Head-to-head evidence from 3 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Verified leaderboard positions: Composer 2 unranked; Nemotron 3 Ultra #24
Evidence parity. Composer 2 and Nemotron 3 Ultra share 3 comparable benchmark results. 2 of 8 categories are comparable. 2 results are unique to Composer 2; 36 to Nemotron 3 Ultra.
Updated July 16, 2026- Shared results
- 3
- Composer 2 only
- 2
- Nemotron 3 Ultra only
- 36
- Comparable categories
- 2 / 8
Pick Composer 2 if you want the stronger benchmark profile. Nemotron 3 Ultra only becomes the better choice if coding is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 3 shared benchmark results across 2 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Composer 2 finishes one point ahead on BenchLM's provisional leaderboard, 61 to 60. That is enough to call, but not enough to treat as a blowout. This matchup comes down to a few meaningful edges rather than one model dominating the board.
Composer 2's sharpest advantage is in agentic, where it averages 61.7 against 51.3. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 61.7% to 56.4%. Nemotron 3 Ultra does hit back in coding, so the answer changes if that is the part of the workload you care about most.
Composer 2 is also the more expensive model on tokens at $0.50 input / $2.50 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. Nemotron 3 Ultra gives you the larger context window at 1M, compared with 200K for Composer 2.
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 | Composer 2 | Δ | Nemotron 3 Ultra |
|---|---|---|---|
| Agentic | Composer 261.7 | Margin← 10.4 | Nemotron 3 Ultra51.3 |
| Coding | Composer 258.0 | Margin→ 0.3 | Nemotron 3 Ultra58.3 |
| Reasoning | Composer 2Not measured | MarginNo overlap | Nemotron 3 Ultra61.9 |
| Knowledge | Composer 2Not measured | MarginNo overlap | Nemotron 3 Ultra54.2 |
| Multilingual | Composer 2Not measured | MarginNo overlap | Nemotron 3 Ultra83.0 |
| Inst. Following | Composer 2Not measured | MarginNo overlap | Nemotron 3 Ultra81.7 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
Terminal-Bench 2.0
AgenticA 61.7%B 56.4%Winner: Composer 2Δ 5.3Terminal-Bench 2.0: Composer 2 scored 61.7%; Nemotron 3 Ultra scored 56.4%. Composer 2 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Composer 2 | Nemotron 3 Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Composer 2$0.5 input / $2.5 output | Nemotron 3 Ultra$0 input / $0 output | Nemotron 3 Ultra has the lower combined listed price. |
| Generation speedtokens per second | Composer 2Not available | Nemotron 3 UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Composer 2Not available | Nemotron 3 UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Composer 2200K | Nemotron 3 Ultra1M | Nemotron 3 Ultra lists the larger context window. |
Benchmark Deep Dive
AgenticComposer 2 wins12 benchmarks
| Benchmark | Composer 2 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 61.7% | 56.4% | Composer 2 leads |
| 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 |
CodingNemotron 3 Ultra wins10 benchmarks
| Benchmark | Composer 2 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| SWE MultilingualSource | 73.7% | 67.7% | Composer 2 leads |
| SWE-RebenchSource | 58% | — | Not comparable |
| React Native EvalsSource | 96.1% | — | Not comparable |
| Terminal-Bench 2.0Source | 61.7% | 56.4% | Composer 2 leads |
| SWE-bench VerifiedSource | — | 71.9% | Not comparable |
| LiveCodeBench v6Source | — | 89.0% | Not comparable |
| SciCodeSource | — | 44.6% | 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 | Composer 2 | 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 | Composer 2 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| MMLU-ProXSource | — | 83% | Not comparable |
Multimodal1 benchmarks
| Benchmark | Composer 2 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Design Arena WebsiteSource | — | 1132 | Not comparable |
Frequently Asked Questions (3)
Which is better, Composer 2 or Nemotron 3 Ultra?
Composer 2 is ahead on BenchLM's provisional leaderboard, 61 to 60. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 61.7% and 56.4%.
Which is better for coding, Composer 2 or Nemotron 3 Ultra?
Nemotron 3 Ultra has the edge for coding in this comparison, averaging 58.3 versus 58. Inside this category, SWE Multilingual is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Composer 2 or Nemotron 3 Ultra?
Composer 2 has the edge for agentic tasks in this comparison, averaging 61.7 versus 51.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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