While SWE-bench Verified is not a perfect benchmark for coding, AFAIK, this is the first open-weights model that has crossed the threshold of 80% score on this by scoring 80.6%.

Back in Nov 2025, Opus 4.5 (80.9%) was the first proprietary model to do so.

SWE-bench Verified is, at this point, contaminated https://openai.com/index/why-we-no-longer-evaluate-swe-bench...

So it os hard to tell how much of a model gain is due to skill, and how much - overfitting.