# Coding

As of Oct 13, 2026, Claude Opus 5.5 & Claude Sonnet 5.5 share Coding. Claude Opus 5.5 is tied for SOTA in Coding with Claude Sonnet 5.5, within the…

Software engineering skill. Terminal-Bench 4.0 and SWE-bench Pro V2 HARD are the primaries. SWE-bench Verified is shown and ignored for the crown.