It's May 2026 and there are a lot of coding models to choose from. Everything below is based on my personal experience running them in real agent loops - Claude Code, Copilot, and OpenCode, backed up by benchmark data and what other people are actually saying on Reddit.

Quick comparison

Benchmark column uses SWE-bench Verified, vendor-reported single-attempt numbers. LMSYS Arena ranks from arena.ai/leaderboard.

Model

Released