Same concept · same prompt · same initial validator

Mercury versus Sonnet

Both models directed three possible lessons for Go slice append and backing-array aliasing. Select a model, then inspect each storyboard without any rewritten or rescued output.

Latency is end-to-end for each route: direct OpenRouter inference for Mercury; authenticated Claude Code CLI for Sonnet. Claude Code recorded Sonnet 5 as the main generation model and also reported an internal Haiku helper.