The ultimate test for coding agents isn't local editing—
it's whole-repo evolution, and right now, the survival rate is 5.4%.
Today we’re releasing SWE Refactor Bench, a benchmark for long-horizon, whole-repository software stack migration.
Coding agents are getting very good at fixing bugs.
But can they refactor an entire system, C → Rust, Maven → Gradle, POSIX → WebAssembly?
We built 20 real migrations across projects, including SQLite, zlib, libsodium, and GraphHopper.
520 runs. Only 28 survived all 3 stages. 13/20 tasks were solved by nobody.
System-scale migration is still wide open.
Full breakdown 👇
GitHub: [https://t.co/xXyLQ3qq0C]
Paper Link: [https://t.co/lO1Enh63q7]
Einsia Website: [https://t.co/AGn0hF5gwL]
Seeing Claude Opus 5 top out at 47% while most models struggle under 20% shows just how big the gap is between local bug fixes on SWE-bench and true whole-repo stack migration. When you test across 20 real-world codebases with a 3-stage audit, passing isolated tests isn’t enough anymore. Long-horizon refactoring is the real test of autonomy.
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How do you animate comedy with AI?
Our new animated short film answers exactly that question.
"If You Stop Loving Me, I'll Die” is now live and open-sourced for $1,000,000 Higgsfield Global Film Festival.
All prompts and assets are now public.
Seedance 2.0 Fast is now available from as low as $0.01 per second with Pro and Ultra plans.
This introductory price is based on the first-purchase offer available on the CapCut app and applies to eligible plans and generation settings.
Create more, generate faster, and bring your ideas to life with Seedance 2.0 Fast on CapCut!
The above price is calculated based on U.S. App pricing. Equivalent pricing may vary due to currency and exchange rates, as well as your market, plan, platform, and generation settings.