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Pareto 26.9 medium vs SWE-2 Max high

No clear quality winner: SWE-2 Max high won 9, Pareto 26.9 medium won 7, 8 tied; Pareto 26.9 medium leads on agent time: 1.7× faster; SWE-2 Max high’s cost wasn’t recorded.

24 tasksData from

Stet score

Pareto 26.9 mediumclaude-code · medium reasoningRank 7 of 16

57.195% range 47.0–66.7

SWE-2 Max highdevin · high reasoningRank 3 of 16

64.395% range 54.3–73.97.2 points higher

A directional read: their 95% score ranges overlap.

Cost / task

Pareto 26.9 medium$12.47
SWE-2 Max highnot recorded

Agent time / task

Pareto 26.9 medium39.2 min1.7× faster
SWE-2 Max high68.3 min

Quality

Head-to-head matchups

Pareto 26.9 medium won7

Tied8

SWE-2 Max high won9

SWE-2 Max high’s win share 56%, 95% range 39–72%Ties are within judge noise.

Task by task

Pareto 26.9 medium solved 2 tasks that SWE-2 Max high didn’t, and SWE-2 Max high solved 5 that Pareto 26.9 medium didn’t. Both solved 11; neither solved 6.

Pareto 26.9 medium only 2

  • stet-43493c52Passed tests
  • stet-commit-f8ae1177Passed tests

SWE-2 Max high only 5

  • stet-commit-5d766ddePassed tests
  • stet-commit-342d0ac0Equivalent to the merged fix
  • stet-commit-60a0e6c2Passed tests
  • stet-commit-5e075641Passed tests
  • stet-commit-a8716b88Equivalent to the merged fix

A 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.

All 24 compared tasks
Task by task
TaskPareto 26.9 mediumSWE-2 Max highSolved by
stet-3169aefaPassed testsPassed testsBoth
stet-89dfbc27Passed testsPassed testsBoth
stet-b28f4fe7Passed testsPassed testsBoth
stet-232b50baPassed testsPassed testsBoth
stet-5276aa3fPassed testsPassed testsBoth
stet-commit-bbbbae09Passed testsPassed testsBoth
stet-66762b4cPassed testsPassed testsBoth
stet-15439c21Passed testsEquivalent to the merged fixBoth
stet-commit-5d766ddeFailedPassed testsSWE-2 Max high only
stet-43493c52Passed testsFailedPareto 26.9 medium only
stet-commit-f0caded9Equivalent to the merged fixPassed testsBoth
stet-6f84e978Passed testsPassed testsBoth
stet-2450ca2dPassed testsPassed testsBoth
stet-commit-342d0ac0FailedEquivalent to the merged fixSWE-2 Max high only
stet-commit-f8ae1177Passed testsFailedPareto 26.9 medium only
stet-commit-60a0e6c2FailedPassed testsSWE-2 Max high only
stet-commit-5e075641FailedPassed testsSWE-2 Max high only
stet-commit-2826765eFailedFailedNeither
stet-commit-a8716b88FailedEquivalent to the merged fixSWE-2 Max high only
stet-commit-e928166fFailedFailedNeither
stet-commit-30506f8eFailedFailedNeither
stet-commit-87814583FailedFailedNeither
stet-commit-d2ab0c25FailedFailedNeither
stet-commit-e41c2e2dFailedFailedNeither

Side by side

Side by side
MetricPareto 26.9 mediumSWE-2 Max high
Harnessclaude-codedevin
Reasoning effortmediumhigh
Rank7 of 163 of 16
Stet score57.195% range 47.0–66.764.395% range 54.3–73.9
Solved13/2412 passed, 1 judged equivalent16/2413 passed, 3 judged equivalent
Cost / task$12.47not recorded
Agent time / task39.2 min68.3 min

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About this data

  • 24 tasks, each a merged change replayed from the repo as it was just before the merge.
  • Data from .
  • Both setups come from the same leaderboard run of 16 setups: bmk_d4ba310fdf50db4ccb2092e3.

See all 16 setups on the leaderboardHow Stet measures