Terminal-Bench 4.0, middle of three requests

GPT 5.6 Sol on “Build and apply a five-day ERP/MES/WMS production plan”

Longer

1.07× longer

Worked 7% past the request, 1 min 20 s over.

Asked

Worked

Safety cutoff 2 h 40 min, off the scale

Every detail of this run

Agent: GPT 5.6 Sol, in Codex
Benchmark: Terminal-Bench 4.0
Task: Build and apply a five-day ERP/MES/WMS production plan
Asked for: 20 minutes: “Please work on this task for a full 20 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 21 min 20 s (1,280 s)
Ratio: 1.07× the request
How it ended: Ending not labelled yet
Grade: Did not pass; It did not pass the task's tests. The grader returned 0. Pass rule: The task's tests pass.
Score: 0 of 100; Graded during the run. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: xtsvs2dn2l
Data release: 26 Sep 2026

The other requests for GPT 5.6 Sol on this task, and the other agents at this request
Sol on this task	Asked	Worked	Result
Shortest	5 minutes	5 min 58 s	1.19× longer
Middle (this run)	20 minutes	21 min 20 s	1.07× longer
Longest	80 minutes	1 h 21 min	Within 5%
Other agents, middle request
GPT 6 Astra	20 minutes	20 min 23 s	Within 5%
Claude Fable 5.1	20 minutes	38 min 9 s	1.91× longer

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