Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Mythos 5
99
Nemotron 3 Ultra
63
Verified leaderboard positions: Claude Mythos 5 #1 · Nemotron 3 Ultra #25
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.
Agentic
+35.3 difference
Coding
+11.7 difference
Knowledge
+12.0 difference
Claude Mythos 5
Nemotron 3 Ultra
$10 / $50
$0 / $0
N/A
N/A
N/A
N/A
1M+
1M
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.
Claude Mythos 5 is clearly ahead on the provisional aggregate, 99 to 63. 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 51.7. 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.
Claude Mythos 5 is ahead on BenchLM's provisional leaderboard, 99 to 63. The biggest single separator in this matchup is BrowseComp, where the scores are 88% and 44.4%.
Claude Mythos 5 has the edge for knowledge tasks in this comparison, averaging 74.6 versus 62.6. Inside this category, HLE is the benchmark that creates the most daylight between them.
Claude Mythos 5 has the edge for coding in this comparison, averaging 85.9 versus 74.2. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Claude Mythos 5 has the edge for agentic tasks in this comparison, averaging 87 versus 51.7. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
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