SWE-ZERO-12M: 12M open agent trajectories

The dataset contains 112B tokens across 122K PRs and 3K repos, making software-agent behavior available at unusual scale

Introducing SWE-ZERO-12M-trajectories: the largest agentic trace dataset in the open, 5.7x larger than the previous largest. 112B tokens · 12M trajectories · 122K PRs · 3K repos · 16 languages
Ranked #8 on backlist 2026-05-13 (13 May 2026 UTC) · by (Kevin Li) ·

How it ranks: Backlist reads my Twitter/X timeline, scores every tweet for substance with an LLM rubric (not engagement), and publishes the daily top picks with a one-line takeaway. Curated by Surya Dantuluri.