Claude Sonnet 4.5 vs Ornith-1.0-9B

Pick Claude Sonnet 4.5 if you want the stronger benchmark profile. Ornith-1.0-9B only becomes the better choice if you want the cheaper token bill or you need the larger 262K context window.

Claude Sonnet 4.5 is clearly ahead on the provisional aggregate, 64 to 52. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Claude Sonnet 4.5's sharpest advantage is in agentic, where it averages 55.3 against 43.1. The single biggest benchmark swing on the page is SWE-bench Verified, 77.2% to 69.4%.

Claude Sonnet 4.5 is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Ornith-1.0-9B. That is roughly Infinityx on output cost alone. Ornith-1.0-9B is the reasoning model in the pair, while Claude Sonnet 4.5 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Ornith-1.0-9B gives you the larger context window at 262K, compared with 200K for Claude Sonnet 4.5.