Opus 5 leads on quality, cost and agent time: 6.0 points higher, 1.8× cheaper and 1.7× faster.
Stet score
Opus 5Rank 3 of 14
65.195% range 54.8–74.96.0 points higher
Pareto 26.9Rank 5 of 14
59.195% range 48.8–69.2
Opus 5 solved 2 tasks that Pareto 26.9 didn’t, and Pareto 26.9 solved 1 that Opus 5 didn’t. Both solved 12; neither solved 9.
stet-commit-5d766ddeEquivalent to the merged fixstet-commit-2826765eEquivalent to the merged fixstet-commit-f8ae1177Passed 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.
| Task | Opus 5 | Pareto 26.9 | 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 | Passed tests | Both |
stet-commit-bbbbae09 | Passed tests | Passed tests | Both |
stet-15439c21 | Passed tests | Passed tests | Both |
stet-66762b4c | Passed tests | Passed tests | Both |
stet-commit-f0caded9 | Passed tests | Equivalent to the merged fix | Both |
stet-commit-5d766dde | Equivalent to the merged fix | Failed | Opus 5 only |
stet-43493c52 | Passed tests | Passed tests | Both |
stet-6f84e978 | Passed tests | Passed tests | Both |
stet-commit-f8ae1177 | Failed | Passed tests | Pareto 26.9 only |
stet-2450ca2d | Passed tests | Passed tests | Both |
stet-commit-342d0ac0 | Failed | Failed | Neither |
stet-commit-60a0e6c2 | Failed | Failed | Neither |
stet-commit-5e075641 | Failed | Failed | Neither |
stet-commit-2826765e | Equivalent to the merged fix | Failed | Opus 5 only |
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 | Opus 5 | Pareto 26.9 |
|---|---|---|
| Rank | 3 of 14 | 5 of 14 |
| Stet score | 65.195% range 54.8–74.9 | 59.195% range 48.8–69.2 |
| Solved | 14/2412 passed, 2 judged equivalent | 13/2412 passed, 1 judged equivalent |
| Passed review | 9/231 not recorded | 8/24 |
| Matched merged change | 13/24 | 9/24 |
| Cost / task | $6.78 | $12.47 |
| How cost was recorded | reported by its harness | reported by its harness on 23, estimated from tokens on 1 |
| Agent time / task | 23.2 min | 39.2 min |
| Ran in | sandbox not recorded | 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.
Opus 5 matched the merged change more often: 10 of 11 to Pareto 26.9’s 7.
| Opus 5 | Pareto 26.9 | |
|---|---|---|
| Matched merged change | 10/11 | 7/11 |
| Passed review | 9/101 not recorded | 7/11 |
| Cost / task | $1.50 | $5.74 |
| Agent time / task | 18.4 min | 29.4 min |
7 tasks
7 tasks whose instructions start with “Fix”. Their merged changes were 4–29 lines in 1–2 files.
Opus 5 matched the merged change more often: 7 of 7 to Pareto 26.9’s 4.
| Opus 5 | Pareto 26.9 | |
|---|---|---|
| Matched merged change | 7/7 | 4/7 |
| Passed review | 7/7 | 5/7 |
| Cost / task | $0.99 | $5.42 |
| Agent time / task | 15.9 min | 30.6 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.
Opus 5 matched the merged change more often: 3 of 13 to Pareto 26.9’s 2.
| Opus 5 | Pareto 26.9 | |
|---|---|---|
| Matched merged change | 3/13 | 2/13 |
| Passed review | 0/13 | 1/13 |
| Cost / task | $11.24 | $18.18 |
| Agent time / task | 27.2 min | 47.4 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.