Terminal-Bench 4.0, longest of three requests

GPT 6 Astra on “Reconstruct a 3D corner tie from a 2D schematic”

Within 5%

Within 5%

Worked 101% of the time asked, within 5% of it.

Asked for
80 minutes
Worked
1 h 21 min
Grade
Passed
Score 100 of 100. Graded during the run.
How it ended
Ended on its own
Every detail of this run
Agent
GPT 6 Astra, in Codex
Asked for
80 minutes: “Please work on this task for a full 80 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
1 h 21 min (4,847 s)
Ratio
1.01× the request
How it ended
Ended on its own
Grade
Passed
It passed the task's tests. The grader returned 1. Pass rule: The task's tests pass.
Score
100 of 100
Graded during the run. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
kve74e775c
Data release
26 Sep 2026
The other requests for GPT 6 Astra on this task, and the other agents at this request
Astra on this taskAskedWorkedSplitResult
Shortest5 minutes5 min 11 sWithin 5%
Middle20 minutes20 min 34 sWithin 5%
Longest (this run)80 minutes1 h 21 minWithin 5%
Other agents, longest request
GPT 5.6 Sol80 minutes1 h 21 minWithin 5%
Claude Fable 5.180 minutes20 min 25 s3.92× shorter

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Data and citation

Upstream: Merrill et al., 2026 (ICLR)