Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Mythos 5
99
Laguna XS.2
37
Verified leaderboard positions: Claude Mythos 5 #1 · Laguna XS.2 unranked
Pick Claude Mythos 5 if you want the stronger benchmark profile. Laguna XS.2 only becomes the better choice if you want the cheaper token bill.
Agentic
+51.3 difference
Coding
+30.8 difference
Claude Mythos 5
Laguna XS.2
$10 / $50
$0 / $0
N/A
N/A
N/A
N/A
1M+
131K
Pick Claude Mythos 5 if you want the stronger benchmark profile. Laguna XS.2 only becomes the better choice if you want the cheaper token bill.
Claude Mythos 5 is clearly ahead on the provisional aggregate, 99 to 37. 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 35.7. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 88% to 35.7%.
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 Laguna XS.2. That is roughly Infinityx on output cost alone. Claude Mythos 5 gives you the larger context window at 1M+, compared with 131K for Laguna XS.2.
Claude Mythos 5 is ahead on BenchLM's provisional leaderboard, 99 to 37. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 88% and 35.7%.
Claude Mythos 5 has the edge for coding in this comparison, averaging 85.9 versus 55.1. 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 35.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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