Mercury Edit 2 claims the next-edit quality lead at 221ms

Inception's Mercury Edit 2 predicts a programmer's next change from recent edits and code context. Its announcement reports 75.6% quality at 221 milliseconds of response latency. The methodology gives that percentage a specific meaning: it averages four editing benchmarks. One checks modified code by running tests; three use another language model to judge similarity to human-written reference edits. The score therefore measures performance across that test suite, rather than the percentage of suggestions developers accept or the proportion of real projects edited correctly.