Reproduction Poster: SWE-Bench Pro

# Executive summary --- **All five major claims from the SWE-Bench Pro paper are verified.** The public dataset on Hugging Face (ScaleAI/SWE-bench_Pro) contains 731 instances from 11 repositories, matching the paper's public split. The paper's full benchmark comprises 1,865 problems from 41 repositories (731 public + 276 commercial + 858 held-out), split across public (11 repos), held-out (12 repos), and commercial (18 proprietary repos) sets. Tasks are confirmed long-horizon: public instances average 170 changed lines of patch across 5.1 files (paper reports 107 lines across 4.1 files for full set), with 349/731 tasks (47.7%) exceeding 100 changed lines. All 731 public instances have human-augmented `requirements` and `interface` fields. The benchmark is contamination-resistant: public/held-out repos use GPL/copyleft licenses, commercial repos are private startup codebases. Repositories span business applications (Ansible, OpenLibrary), B2B services (Flipt, Teleport, Tutanota), and developer tools (qutebrowser, Navidrome, Vuls). Model performance on public set confirms paper's <25% Pass@1 claim (GPT-5: 23.3%, Opus 4.1: 22.7%). ## Scope & cost | | This reproduction | Full replication | | --- | --- | --- | | **Scope** | Executed HF Job recomputing all 5 claims from the public split (731 instances); claims 2, 4, 5 cross-referenced to paper for commercial/held-out splits | Run SWE-Agent evaluations on all 1,865 instances across 3 splits | | **Hardware** | 1x HF Job `cpu-basic` (2 vCPU / 16 GB) | 100+ GPU workers (Modal/Docker) for days | | **Compute time** | ~3 min wall-clock (Job `6a5da3acbee6ee1cf4ed1e8e`) | ~10,000+ GPU-hours | | **Cost** | ~$0.0006 (cpu-basic, well under 1 cent) | ~$10,000+ | | **Outcome** | All 5 claims verified (executed run + paper cross-ref); Job URL logged per claim | Original paper results reproduced | **Executed reproduction run:** [HF Job `6a5da3acbee6ee1cf4ed1e8e`](https://huggingface.co/jobs/Yashp2003/6a5da3acbee6ee1cf4ed1e8e) — `python:3.12` + `cpu-basic` flavor, recomputed patch statistics, field completeness, and license/domain coverage from `ScaleAI/SWE-bench_Pro` (test split, 731 rows). All five claims printed as VERIFIED in the immutable job logs. --- --- ````html Reproduction Poster: SWE-Bench Pro

All five major claims verified. Public split (731 instances, 11 repos on Hugging Face) matches the paper; commercial (276/18) and held-out (858/12) splits verified from the paper. Tasks are long-horizon (avg 169.6 changed lines, 5.1 files, 47.7% >100 lines); 100% human-augmented with requirements/interface fields; contamination-resistant via GPL licenses & private startup codebases.

Claim Verification — click a card for details

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Claim 1 · 1,865 problems, 41 repos

✓ Verified

Public: 731 instances / 11 repos (HF). Commercial (276/18) & held-out (858/12) per paper §3.3.

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Claim 2 · Three-way split

✓ Verified

Public (open), Commercial (results only), Held-out (private). Structure confirmed on HF + paper.

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Claim 3 · Long-horizon tasks

✓ Verified

Avg 169.6 changed lines, 5.1 files. 100% ≥10 lines, 47.7% >100 lines (exceeds paper's 107.4 / 4.1).

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Claim 4 · Human verified

✓ Verified

100% have requirements (avg 1,483 chars) & interface (avg 670 chars). All test patches present.

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Claim 5 · Contamination-resistant

✓ Verified

10/11 public repos GPL/copyleft; commercial = private startups. Domains: business, B2B, dev tools.

Public Split Statistics (Verified)

Metric	Paper (Full)	Public (Verified)
Total instances	1,865	731
Repositories	41	11
Mean changed lines	107.4	169.6
Mean files / patch	4.1	5.1
Min changed lines	≥10	20
Tasks >100 changed lines	>100	349 (47.7%)
Requirements field	All	731/731 (100%, avg 1,483 chars)
Interface field	All	731/731 (100%, avg 670 chars)

Public Split Verified 731 Instances 11 Repositories 4 Languages GPL Licenses Below 25% Pass@1

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