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GPT 6 Luna low vs SWE-2 Max

SWE-2 Max leads on quality: 45.2 points higher; GPT 6 Luna low leads on agent time: 9.9× faster; SWE-2 Max’s cost wasn’t recorded.

24 tasksData from

Stet score

GPT 6 Luna lowRank 14 of 14

21.295% range 12.5–31.2

SWE-2 MaxRank 1 of 14

66.495% range 56.8–75.445.2 points higher

Their 95% score ranges don’t overlap.

Cost / task

GPT 6 Luna low$0.05
SWE-2 Maxnot recorded

Agent time / task

GPT 6 Luna low6.9 min9.9× faster
SWE-2 Max68.3 min

Task by task

GPT 6 Luna low solved 0 tasks that SWE-2 Max didn’t, and SWE-2 Max solved 10 that GPT 6 Luna low didn’t. Both solved 5; neither solved 8.

GPT 6 Luna low only 0

SWE-2 Max only 10

  • stet-5276aa3fPassed tests
  • stet-commit-bbbbae09Passed tests
  • stet-66762b4cPassed tests
  • stet-commit-f0caded9Passed tests
  • stet-commit-5d766ddePassed tests
  • stet-6f84e978Passed tests
  • stet-2450ca2dPassed tests
  • stet-commit-342d0ac0Equivalent to the merged fix
  • 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. 1 of the 24 tasks is left out because one of the two has no scored result on it.

All 23 compared tasks
Task by task
TaskGPT 6 Luna lowSWE-2 MaxSolved by
stet-3169aefaPassed testsPassed testsBoth
stet-89dfbc27Passed testsPassed testsBoth
stet-b28f4fe7Passed testsPassed testsBoth
stet-232b50baPassed testsPassed testsBoth
stet-5276aa3fFailedPassed testsSWE-2 Max only
stet-commit-bbbbae09No change madePassed testsSWE-2 Max only
stet-15439c21Passed testsEquivalent to the merged fixBoth
stet-66762b4cFailedPassed testsSWE-2 Max only
stet-commit-f0caded9FailedPassed testsSWE-2 Max only
stet-commit-5d766ddeNo change madePassed testsSWE-2 Max only
stet-43493c52FailedFailedNeither
stet-6f84e978FailedPassed testsSWE-2 Max only
stet-commit-f8ae1177No change madeFailedNeither
stet-2450ca2dFailedPassed testsSWE-2 Max only
stet-commit-342d0ac0FailedEquivalent to the merged fixSWE-2 Max only
stet-commit-5e075641FailedPassed testsSWE-2 Max only
stet-commit-2826765eFailedFailedNeither
stet-commit-a8716b88FailedEquivalent to the merged fixSWE-2 Max only
stet-commit-30506f8eFailedFailedNeither
stet-commit-87814583FailedFailedNeither
stet-commit-d2ab0c25FailedFailedNeither
stet-commit-e41c2e2dFailedFailedNeither
stet-commit-e928166fFailedFailedNeither

Side by side

Side by side
MetricGPT 6 Luna lowSWE-2 Max
Rank14 of 141 of 14
Stet score21.295% range 12.5–31.266.495% range 56.8–75.4
Solved5/245 passed, 0 judged equivalent16/2413 passed, 3 judged equivalent
Passed review5/204 not recorded8/24
Matched merged change5/204 not recorded13/24
Cost / task$0.05not recorded
How cost was recordedreported by its harnessnot recorded
Agent time / task6.9 min68.3 min
Ran inDaytona sandboxDaytona sandbox

Where each setup is the better choice

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.

Changes up to 150 lines

11 tasks

11 tasks whose merged change was 2–149 lines in 1–2 files. The 7 small fixes below are among them.

SWE-2 Max matched the merged change more often: 8 of 11 to GPT 6 Luna low’s 5.

Changes up to 150 lines
GPT 6 Luna lowSWE-2 Max
Matched merged change5/118/11
Passed review5/117/11
Cost / task$0.02not recorded
Agent time / task2.1 min22.1 min

Small fixes

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.

Small fixes
GPT 6 Luna lowSWE-2 Max
Matched merged change5/75/7
Passed review5/75/7
Cost / task$0.01not recorded
Agent time / task2.1 min21.5 min

Larger changes

13 tasks

13 tasks whose merged change ran over 150 lines or more than 3 files: 113–1,420 lines in 2–19 files.

Larger changes
GPT 6 Luna lowSWE-2 Max
Matched merged change0/94 not recorded5/13
Passed review0/94 not recorded1/13
Cost / task$0.08not recorded
Agent time / task11.0 min107.3 min

See which setup wins on your repo

Stet replays your merged PRs, scores quality above pass/fail, and delivers comparison reports through your agent.

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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 14 setups: compare-n24-r3b.

See all 14 setups on the leaderboardHow Stet measures