FrontierSWE v1
In use
Agents work up to 20 hours on 17 ultra-long engineering, performance and research tasks in their own harnesses. Models are ranked by average task rank and dominance.
The maker preserves the v1 board as published. FrontierSWE v2 replaced it on 2026-09-02 with 34 tasks, a new harness and mean@5 scores.
Made by Proximal Released Apr 2026 Building whole projects All tasks public Last in a launch post Aug 2026
Last model added Aug 2026
- Level
- Research frontier Researchers, on open problems or tasks that take days
- Scored
- Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
- Answers
- Code A program or patch run against tests.
4
Launch posts list it, from 3 labs
4
System cards report it, from 3 labs
No scores here yet
We have no scores for FrontierSWE v1 yet.
3 labs put it in a launch post in the last six months
Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.
| Date | Launch post | Score | As the post writes it |
|---|---|---|---|
| 14 Aug 2026 | GLM-5.3 | 78.1 | FrontierSWE |
| 3 Aug 2026 |  Qwen 3.8 Max | 73.5 | FrontierSWE |
| 16 Jul 2026 | Kimi K3 | 81.2 | FrontierSWE |
| 16 Jun 2026 | GLM-5.2 | 74.4 | FrontierSWE (Dominance) |
4 system cards report it, from 3 labs
Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.
| Date | Document | Score | As the document writes it | Section |
|---|---|---|---|---|
| 27 Jul 2026 | Kimi K3 technical report | 81.2 | FrontierSWE dominance score recomputed with the official script as of 2026-07-16 (Table 2) | Capabilities |
| 14 Jul 2026 | Grok 4.5 model card | 78 | FrontierSWE, Dominance (win rate versus a random baseline), high, Grok CLI, public leaderboard (2.7) | Capabilities |
| 9 Jun 2026 | Claude Fable 5 system card | FrontierSWE, 17 tasks, ranked #1 on mean@5 with an average rank of 2.12 (lower is better), no mean task score printed (8.5) | Capabilities | |
| 28 May 2026 | Claude Opus 4.8 system card | FrontierSWE leaderboard at xhigh effort, ranked first on mean@5 (average rank 2.74) and best@5 (average rank 2.26), no score printed (8.4) | Capabilities |
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