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GPT 6 Luna max vs SWE-2 Max high

No clear quality winner: SWE-2 Max high won 13, GPT 6 Luna max won 3, 8 tied; GPT 6 Luna max leads on agent time: 1.1× faster; SWE-2 Max high’s cost wasn’t recorded.

24 tasksData from

Stet score

GPT 6 Luna maxcodex · max reasoningRank 10 of 16

47.495% range 38.0–56.4

SWE-2 Max highdevin · high reasoningRank 3 of 16

64.395% range 54.3–73.916.9 points higher

A directional read: their 95% score ranges overlap.

Cost / task

GPT 6 Luna max$0.37
SWE-2 Max highnot recorded

Agent time / task

GPT 6 Luna max59.7 min1.1× faster
SWE-2 Max high68.3 min

Quality

Head-to-head matchups

GPT 6 Luna max won3

Tied8

SWE-2 Max high won13

SWE-2 Max high’s win share 71%, 95% range 56–84%Ties are within judge noise.

Task by task

GPT 6 Luna max solved 2 tasks that SWE-2 Max high didn’t, and SWE-2 Max high solved 6 that GPT 6 Luna max didn’t. Both solved 10; neither solved 6.

GPT 6 Luna max only 2

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

SWE-2 Max high only 6

  • stet-15439c21Equivalent to the merged fix
  • stet-6f84e978Passed tests
  • stet-2450ca2dPassed tests
  • 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
TaskGPT 6 Luna maxSWE-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-66762b4cEquivalent to the merged fixPassed testsBoth
stet-15439c21FailedEquivalent to the merged fixSWE-2 Max high only
stet-commit-5d766ddeEquivalent to the merged fixPassed testsBoth
stet-43493c52Passed testsFailedGPT 6 Luna max only
stet-commit-f0caded9Equivalent to the merged fixPassed testsBoth
stet-6f84e978FailedPassed testsSWE-2 Max high only
stet-2450ca2dFailedPassed testsSWE-2 Max high only
stet-commit-342d0ac0Equivalent to the merged fixEquivalent to the merged fixBoth
stet-commit-f8ae1177Passed testsFailedGPT 6 Luna max 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
MetricGPT 6 Luna maxSWE-2 Max high
Harnesscodexdevin
Reasoning effortmaxhigh
Rank10 of 163 of 16
Stet score47.495% range 38.0–56.464.395% range 54.3–73.9
Solved12/248 passed, 4 judged equivalent16/2413 passed, 3 judged equivalent
Cost / task$0.37not recorded
Agent time / task59.7 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