Model comparison
Claude Mythos 5 vs Nemotron 3 Ultra
Head-to-head evidence from 7 shared benchmark results across 3 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Mythos 5 #2 (Supported); Nemotron 3 Ultra #157 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Mythos 5 and Nemotron 3 Ultra share 7 comparable benchmark results. 3 of 8 categories are comparable. 8 results are unique to Claude Mythos 5; 31 to Nemotron 3 Ultra.
Updated July 24, 2026- Shared results
- 7
- Claude Mythos 5 only
- 8
- Nemotron 3 Ultra only
- 31
- Comparable categories
- 3 / 8
Pick Claude Mythos 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 7 shared benchmark results across 3 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Mythos 5 is clearly ahead on the BenchAlign aggregate, 83.01 to 43.67. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Mythos 5's sharpest advantage is in agentic, where it averages 87 against 51.3. The single biggest benchmark swing on the page is BrowseComp, 88% to 44.4%.
Claude Mythos 5 is also the more expensive model on tokens at $10.00 input / $50.00 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. Claude Mythos 5 gives you the larger context window at 1M+, compared with 1M for Nemotron 3 Ultra.
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 Mythos 5 | Δ | Nemotron 3 Ultra |
|---|---|---|---|
| Agentic | Claude Mythos 587.0 | Margin← 35.7 | Nemotron 3 Ultra51.3 |
| Coding | Claude Mythos 589.7 | Margin← 31.4 | Nemotron 3 Ultra58.3 |
| Knowledge | Claude Mythos 568.5 | Margin← 14.7 | Nemotron 3 Ultra53.8 |
| Reasoning | Claude Mythos 5Not measured | MarginNo overlap | Nemotron 3 Ultra61.9 |
| Math | Claude Mythos 597.6 | MarginNo overlap | Nemotron 3 UltraNot measured |
| Multilingual | Claude Mythos 5Not measured | MarginNo overlap | Nemotron 3 Ultra83.0 |
| Multimodal | Claude Mythos 593.5 | MarginNo overlap | Nemotron 3 UltraNot measured |
| Inst. Following | Claude Mythos 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 88%B 44.4%Winner: Claude Mythos 5Δ 43.6BrowseComp: Claude Mythos 5 scored 88%; Nemotron 3 Ultra scored 44.4%. Claude Mythos 5 wins this benchmark. - Source ↗
HLE
KnowledgeA 64.5%B 26.7%Winner: Claude Mythos 5Δ 37.8HLE: Claude Mythos 5 scored 64.5%; Nemotron 3 Ultra scored 26.7%. Claude Mythos 5 wins this benchmark. - Source ↗
Terminal-Bench 2.0
AgenticA 88%B 56.4%Winner: Claude Mythos 5Δ 31.6Terminal-Bench 2.0: Claude Mythos 5 scored 88%; Nemotron 3 Ultra scored 56.4%. Claude Mythos 5 wins this benchmark. - Source ↗
SWE-bench Verified
CodingA 95.5%B 71.9%Winner: Claude Mythos 5Δ 23.6SWE-bench Verified: Claude Mythos 5 scored 95.5%; Nemotron 3 Ultra scored 71.9%. Claude Mythos 5 wins this benchmark. - Source ↗
GPQA
KnowledgeA 94.1%B 87%Winner: Claude Mythos 5Δ 7.1GPQA: Claude Mythos 5 scored 94.1%; Nemotron 3 Ultra scored 87%. Claude Mythos 5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Mythos 5 | Nemotron 3 Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Mythos 5$10 input / $50 output | Nemotron 3 Ultra$0 input / $0 output | Nemotron 3 Ultra has the lower combined listed price. |
| Generation speedtokens per second | Claude Mythos 5Not available | Nemotron 3 UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Mythos 5Not available | Nemotron 3 UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Mythos 51M+ | Nemotron 3 Ultra1M | Claude Mythos 5 lists the larger context window. |
Benchmark Deep Dive
AgenticClaude Mythos 5 wins15 benchmarks
| Benchmark | Claude Mythos 5 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 88% | 56.4% | Claude Mythos 5 leads |
| OSWorld-VerifiedSource | 85% | — | Not comparable |
| BrowseCompSource | 88% | 44.4% | Claude Mythos 5 leads |
| ExploitGymSource | 17.5% | — | Not comparable |
| PinchBenchSource | — | 90.0% | Not comparable |
| τ³-bench resultsSource | — | 70.9% | Not comparable |
| GDPval-AASource | — | 33.1% | 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 | — | 1162 | Not comparable |
| AA BriefcaseSource | — | 873 | Not comparable |
| AA EnterpriseOps-GymSource | — | 28.9% | Not comparable |
| AA Harvey LABSource | — | 81.7% | Not comparable |
| terminalBenchHardSource | — | 36.4% | Not comparable |
CodingClaude Mythos 5 wins7 benchmarks
| Benchmark | Claude Mythos 5 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 95.5% | 71.9% | Claude Mythos 5 leads |
| SWE-bench ProSource | 80.3% | — | Not comparable |
| Terminal-Bench 2.0Source | 88.0% | 56.4% | Claude Mythos 5 leads |
| SWE MultilingualSource | — | 67.7% | Not comparable |
| SciCodeSource | — | 44.6% | Not comparable |
| AA Coding IndexSource | — | 49.3% | Not comparable |
| AA-SciCodeSource | — | 39.9% | Not comparable |
Reasoning3 benchmarks
KnowledgeClaude Mythos 5 wins12 benchmarks
| Benchmark | Claude Mythos 5 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| GPQASource | 94.1% | 87% | Claude Mythos 5 leads |
| HLESource | 64.5% | 26.7% | Claude Mythos 5 leads |
| HLE w/o toolsSource | 59% | 26.7% | Claude Mythos 5 leads |
| GPQA-DSource | — | 87.0% | 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 |
Math1 benchmarks
| Benchmark | Claude Mythos 5 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| USAMO 2026Source | 97.6% | — | Not comparable |
Multilingual2 benchmarks
Multimodal4 benchmarks
Frequently Asked Questions (4)
Which is better, Claude Mythos 5 or Nemotron 3 Ultra?
Claude Mythos 5 is ahead on BenchLM's BenchAlign leaderboard, 83.01 to 43.67. The biggest single separator in this matchup is BrowseComp, where the scores are 88% and 44.4%.
Which is better for knowledge tasks, Claude Mythos 5 or Nemotron 3 Ultra?
Claude Mythos 5 has the edge for knowledge tasks in this comparison, averaging 68.5 versus 53.8. Inside this category, HLE is the benchmark that creates the most daylight between them.
Which is better for coding, Claude Mythos 5 or Nemotron 3 Ultra?
Claude Mythos 5 has the edge for coding in this comparison, averaging 89.7 versus 58.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Claude Mythos 5 or Nemotron 3 Ultra?
Claude Mythos 5 has the edge for agentic tasks in this comparison, averaging 87 versus 51.3. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.