Haiku 5.5 max leads on quality: 10.8 points higher; DeepSeek V4.1 Flash leads on cost and agent time: 7.8× cheaper and 1.2× faster.
Stet score
DeepSeek V4.1 FlashRank 9 of 14
47.895% range 37.5–58.0
Haiku 5.5 maxRank 6 of 14
58.695% range 47.5–69.010.8 points higher
DeepSeek V4.1 Flash solved 3 tasks that Haiku 5.5 max didn’t, and Haiku 5.5 max solved 3 that DeepSeek V4.1 Flash didn’t. Both solved 9; neither solved 8.
stet-232b50baPassed testsstet-66762b4cPassed testsstet-43493c52Passed testsstet-6f84e978Equivalent to the merged fixstet-commit-f8ae1177Passed testsstet-2450ca2dPassed testsA 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 | Haiku 5.5 max | 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 | Failed | DeepSeek V4.1 Flash only |
stet-5276aa3f | Passed tests | Passed tests | Both |
stet-commit-bbbbae09 | Passed tests | Passed tests | Both |
stet-15439c21 | Passed tests | Passed tests | Both |
stet-66762b4c | Passed tests | Failed | DeepSeek V4.1 Flash only |
stet-commit-f0caded9 | Passed tests | Passed tests | Both |
stet-commit-5d766dde | Passed tests | Equivalent to the merged fix | Both |
stet-43493c52 | Passed tests | Failed | DeepSeek V4.1 Flash only |
stet-6f84e978 | Failed | Equivalent to the merged fix | Haiku 5.5 max only |
stet-commit-f8ae1177 | Failed | Passed tests | Haiku 5.5 max only |
stet-2450ca2d | Failed | Passed tests | Haiku 5.5 max only |
stet-commit-342d0ac0 | Equivalent to the merged fix | Equivalent to the merged fix | Both |
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 | Haiku 5.5 max |
|---|---|---|
| Rank | 9 of 14 | 6 of 14 |
| Stet score | 47.895% range 37.5–58.0 | 58.695% range 47.5–69.0 |
| Solved | 12/2411 passed, 1 judged equivalent | 12/249 passed, 3 judged equivalent |
| Passed review | 8/24 | 9/222 not recorded |
| Matched merged change | 10/231 not recorded | 10/222 not recorded |
| Cost / task | $0.49from 23/24 tasks | $3.85 |
| How cost was recorded | estimated from tokens on 23, not recorded on 1 | reported by its harness on 23, estimated from tokens on 1 |
| Agent time / task | 49.3 min | 58.4 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 | Haiku 5.5 max | |
|---|---|---|
| Matched merged change | 7/11 | 7/101 not recorded |
| Passed review | 8/11 | 7/101 not recorded |
| Cost / task | $0.21 | $1.18 |
| Agent time / task | 34.9 min | 36.3 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 Haiku 5.5 max’s 5.
| DeepSeek V4.1 Flash | Haiku 5.5 max | |
|---|---|---|
| Matched merged change | 5/7 | 5/7 |
| Passed review | 6/7 | 5/7 |
| Cost / task | $0.19 | $1.15 |
| Agent time / task | 34.6 min | 34.6 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.
Both matched the merged change on 3 of 12.
| DeepSeek V4.1 Flash | Haiku 5.5 max | |
|---|---|---|
| Matched merged change | 3/121 not recorded | 3/121 not recorded |
| Passed review | 0/13 | 2/121 not recorded |
| Cost / task | $0.751 not recorded | $6.11 |
| Agent time / task | 61.5 min | 77.1 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.