Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Mythos 5
99
Ornith-1.0-397B
96
Verified leaderboard positions: Claude Mythos 5 #1 · Ornith-1.0-397B unranked
Pick Claude Mythos 5 if you want the stronger benchmark profile. Ornith-1.0-397B only becomes the better choice if you want the cheaper token bill.
Agentic
+9.5 difference
Coding
+3.5 difference
Claude Mythos 5
Ornith-1.0-397B
$10 / $50
$0 / $0
N/A
N/A
N/A
N/A
1M+
262K
Pick Claude Mythos 5 if you want the stronger benchmark profile. Ornith-1.0-397B only becomes the better choice if you want the cheaper token bill.
Claude Mythos 5 has the cleaner provisional overall profile here, landing at 99 versus 96. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
Claude Mythos 5's sharpest advantage is in agentic, where it averages 87 against 77.5. The single biggest benchmark swing on the page is SWE-bench Verified, 95.5% to 82.4%.
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 Ornith-1.0-397B. That is roughly Infinityx on output cost alone. Claude Mythos 5 gives you the larger context window at 1M+, compared with 262K for Ornith-1.0-397B.
Claude Mythos 5 is ahead on BenchLM's provisional leaderboard, 99 to 96. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 95.5% and 82.4%.
Claude Mythos 5 has the edge for coding in this comparison, averaging 85.9 versus 82.4. Inside this category, SWE-bench Verified 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 77.5. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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