Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Mythos Preview
99
ZAYA1-8B
62
Verified leaderboard positions: Claude Mythos Preview #1 · ZAYA1-8B unranked
Pick Claude Mythos Preview if you want the stronger benchmark profile. ZAYA1-8B only becomes the better choice if you want the cheaper token bill.
Knowledge
+1.8 difference
Claude Mythos Preview
ZAYA1-8B
$25 / $125
$0 / $0
N/A
N/A
N/A
N/A
1M
131K
Pick Claude Mythos Preview if you want the stronger benchmark profile. ZAYA1-8B only becomes the better choice if you want the cheaper token bill.
Claude Mythos Preview is clearly ahead on the provisional aggregate, 99 to 62. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Mythos Preview's sharpest advantage is in knowledge, where it averages 74.9 against 73.1. The single biggest benchmark swing on the page is GPQA, 94.5% to 71%.
Claude Mythos Preview is also the more expensive model on tokens at $25.00 input / $125.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for ZAYA1-8B. That is roughly Infinityx on output cost alone. Claude Mythos Preview gives you the larger context window at 1M, compared with 131K for ZAYA1-8B.
Claude Mythos Preview is ahead on BenchLM's provisional leaderboard, 99 to 62. The biggest single separator in this matchup is GPQA, where the scores are 94.5% and 71%.
Claude Mythos Preview has the edge for knowledge tasks in this comparison, averaging 74.9 versus 73.1. Inside this category, GPQA is the benchmark that creates the most daylight between them.
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