sia alternatives
Curated alternatives to sia — and why you'd switch.
evo
Karpathy-style autoresearch on any codebase: /evo:discover instruments the benchmark, /evo:optimize runs tree search with parallel subagents in worktrees. Plugin for Claude Code, Codex & co.
Why switchBoth run autonomous improve-against-a-benchmark loops with paper-adjacent rigor. evo points coding agents at YOUR codebase (tree search over commits); SIA generates a task-specific agent and evolves the agent itself — harness and weights.
Full comparison →autoresearch
Karpathy's autoresearch loop as an installable skill for Claude Code, OpenCode and Codex: constraint + mechanical metric + autonomous modify→verify→keep/discard iteration.
Why switchSame lineage — the autoresearch loop: metric, modify, verify, keep or discard. The skill hill-climbs your code with a fixed agent; SIA makes the agent itself the thing that improves, up to and including its weights.
Full comparison →