DeepSeek V4.1 Flash leads on quality: 26.6 points higher; GPT 6 Luna low leads on cost and agent time: 9.2× cheaper and 7.2× faster.
Stet score
DeepSeek V4.1 FlashRank 9 of 14
47.895% range 37.5–58.026.6 points higher
GPT 6 Luna lowRank 14 of 14
21.295% range 12.5–31.2
DeepSeek V4.1 Flash solved 7 tasks that GPT 6 Luna low didn’t, and GPT 6 Luna low solved 0 that DeepSeek V4.1 Flash didn’t. Both solved 5; neither solved 11.
stet-5276aa3fPassed testsstet-commit-bbbbae09Passed testsstet-66762b4cPassed testsstet-commit-f0caded9Passed testsstet-commit-5d766ddePassed testsstet-43493c52Passed testsstet-commit-342d0ac0Equivalent to the merged fixA task counts as solved when its tests passed or a judge found the fix equivalent to the merged change, as in the leaderboard’s Solved column. Stet score also weighs code quality, so it can order the two differently. 1 of the 24 tasks is left out because one of the two has no scored result on it.
| Task | DeepSeek V4.1 Flash | GPT 6 Luna low | Solved by |
|---|---|---|---|
stet-3169aefa | Passed tests | Passed tests | Both |
stet-89dfbc27 | Passed tests | Passed tests | Both |
stet-b28f4fe7 | Passed tests | Passed tests | Both |
stet-232b50ba | Passed tests | Passed tests | Both |
stet-5276aa3f | Passed tests | Failed | DeepSeek V4.1 Flash only |
stet-commit-bbbbae09 | Passed tests | No change made | DeepSeek V4.1 Flash only |
stet-15439c21 | Passed tests | Passed tests | Both |
stet-66762b4c | Passed tests | Failed | DeepSeek V4.1 Flash only |
stet-commit-f0caded9 | Passed tests | Failed | DeepSeek V4.1 Flash only |
stet-commit-5d766dde | Passed tests | No change made | DeepSeek V4.1 Flash only |
stet-43493c52 | Passed tests | Failed | DeepSeek V4.1 Flash only |
stet-6f84e978 | Failed | Failed | Neither |
stet-commit-f8ae1177 | Failed | No change made | Neither |
stet-2450ca2d | Failed | Failed | Neither |
stet-commit-342d0ac0 | Equivalent to the merged fix | Failed | DeepSeek V4.1 Flash only |
stet-commit-5e075641 | Failed | Failed | Neither |
stet-commit-2826765e | Failed | Failed | Neither |
stet-commit-a8716b88 | Failed | Failed | Neither |
stet-commit-30506f8e | Failed | Failed | Neither |
stet-commit-87814583 | Failed | Failed | Neither |
stet-commit-d2ab0c25 | Failed | Failed | Neither |
stet-commit-e41c2e2d | Failed | Failed | Neither |
stet-commit-e928166f | Failed | Failed | Neither |
| Metric | DeepSeek V4.1 Flash | GPT 6 Luna low |
|---|---|---|
| Rank | 9 of 14 | 14 of 14 |
| Stet score | 47.895% range 37.5–58.0 | 21.295% range 12.5–31.2 |
| Solved | 12/2411 passed, 1 judged equivalent | 5/245 passed, 0 judged equivalent |
| Passed review | 8/24 | 5/204 not recorded |
| Matched merged change | 10/231 not recorded | 5/204 not recorded |
| Cost / task | $0.49from 23/24 tasks | $0.05 |
| How cost was recorded | estimated from tokens on 23, not recorded on 1 | reported by its harness |
| Agent time / task | 49.3 min | 6.9 min |
| Ran in | Daytona sandbox | Daytona sandbox |
The leaderboard’s readings on groups of tasks. Each group holds fewer tasks than the overall standings, so treat these as leads to test on your repo.
11 tasks
11 tasks whose merged change was 2–149 lines in 1–2 files. The 7 small fixes below are among them.
DeepSeek V4.1 Flash matched the merged change more often: 7 of 11 to GPT 6 Luna low’s 5.
| DeepSeek V4.1 Flash | GPT 6 Luna low | |
|---|---|---|
| Matched merged change | 7/11 | 5/11 |
| Passed review | 8/11 | 5/11 |
| Cost / task | $0.21 | $0.02 |
| Agent time / task | 34.9 min | 2.1 min |
7 tasks
7 tasks whose instructions start with “Fix”. Their merged changes were 4–29 lines in 1–2 files.
Both matched the merged change on 5 of 7.
DeepSeek V4.1 Flash passed review more often: 6 of 7 to GPT 6 Luna low’s 5.
| DeepSeek V4.1 Flash | GPT 6 Luna low | |
|---|---|---|
| Matched merged change | 5/7 | 5/7 |
| Passed review | 6/7 | 5/7 |
| Cost / task | $0.19 | $0.01 |
| Agent time / task | 34.6 min | 2.1 min |
13 tasks
13 tasks whose merged change ran over 150 lines or more than 3 files: 113–1,420 lines in 2–19 files.
| DeepSeek V4.1 Flash | GPT 6 Luna low | |
|---|---|---|
| Matched merged change | 3/121 not recorded | 0/94 not recorded |
| Passed review | 0/13 | 0/94 not recorded |
| Cost / task | $0.751 not recorded | $0.08 |
| Agent time / task | 61.5 min | 11.0 min |
Stet replays your merged PRs, scores quality above pass/fail, and delivers comparison reports through your agent.
Run it on your repocompare-n24-r3b.