Model comparison
Nemotron Ultra 253B vs o1-pro
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Nemotron Ultra 253B #158 (Estimated); o1-pro #148 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Nemotron Ultra 253B and o1-pro share 1 comparable benchmark result. 0 of 8 categories are comparable. 10 results are unique to Nemotron Ultra 253B; 1 to o1-pro.
Updated July 24, 2026- Shared results
- 1
- Nemotron Ultra 253B only
- 10
- o1-pro only
- 1
- Comparable categories
- 0 / 8
Benchmark data for Nemotron Ultra 253B and o1-pro 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.
o1-pro is priced at $150.00 input / $600.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Nemotron Ultra 253B. o1-pro has the larger context window at 200K, compared with 32K for Nemotron Ultra 253B.
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 | Nemotron Ultra 253B | Δ | o1-pro |
|---|---|---|---|
| Knowledge | Nemotron Ultra 253BNot measured | MarginNo overlap | o1-pro79.0 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Nemotron Ultra 253B | o1-pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Nemotron Ultra 253B$0 input / $0 output | o1-pro$150 input / $600 output | Nemotron Ultra 253B has the lower combined listed price. |
| Generation speedtokens per second | Nemotron Ultra 253BNot available | o1-proNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Nemotron Ultra 253BNot available | o1-proNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Nemotron Ultra 253B32K | o1-pro200K | o1-pro lists the larger context window. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Nemotron Ultra 253B | o1-pro | Result |
|---|---|---|---|
| τ²-bench resultsSource | 11.4% | — | Not comparable |
Coding1 benchmarks
| Benchmark | Nemotron Ultra 253B | o1-pro | Result |
|---|---|---|---|
| AA-SciCodeSource | 34.7% | — | Not comparable |
Reasoning2 benchmarks
Knowledge7 benchmarks
| Benchmark | Nemotron Ultra 253B | o1-pro | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 9.1% | 18.9% | o1-pro leads |
| AA-GPQA DiamondSource | 72.8% | — | Not comparable |
| AA-HLESource | 8.1% | — | Not comparable |
| AA-Omniscience IndexSource | -45.5% | — | Not comparable |
| AA-Omniscience AccuracySource | 19.9% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 81.7% | — | Not comparable |
| GPQASource | — | 79% | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Nemotron Ultra 253B | o1-pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 38.2% | — | Not comparable |
Frequently Asked Questions (3)
Can I compare Nemotron Ultra 253B and o1-pro 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 Nemotron Ultra 253B and o1-pro today?
Nemotron Ultra 253B: $0.00 input / $0.00 output per 1M tokens o1-pro: $150.00 input / $600.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.