SMRTR ProgrammingSep 9, 2026Daily.dev

Agents on Rails: Stage 2. Can a model ship a feature?

SMRTR summary

Agents on Rails Stage 2 raises the bar by testing AI models on real-world Rails feature tickets — not just syntax knowledge. GPT-6 Astra topped the leaderboard at 35% completion, while smaller models like Luna collapsed entirely on complex tasks. The results reveal a consistent gap: models handle happy paths well but miss edge cases a seasoned developer would catch automatically.

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