SWE Atlas, Scale AI's newly completed benchmark suite, evaluates coding agents across professional software engineering tasks, measuring performance on 284 tasks that encompass understanding, validating, and maintaining code. The suite features a live Refactoring leaderboard alongside Codebase QnA and Test Writing benchmarks. Despite advancements, agents display significant gaps in investigating systems, writing precise tests, and executing complete code refactors, highlighting a broader limitation in their ability to deliver comprehensive engineering solutions. Reliability remains a concern, with models succeeding on individual attempts but struggling to maintain consistency across multiple trials. Current model scores are available on the live leaderboard, with top systems achieving scores in the 40s but none exceeding 50%.
Coding AgentsBenchmarkSoftware Engineering+1
Coding AgentsBenchmarkSoftware EngineeringAI Evaluation
SWE Atlas Launches Comprehensive Benchmark Suite for Evaluating Coding Agents
Scale AI Blog· The Scale Research Team· Friday, May 8, 2026
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