Terminal-Bench 4.0, longest of three requests

GPT 5.6 Sol on “Port an Excel/VBA service-desk app to React, FastAPI, and SQLite”

Within 5%

Worked 100% of the time asked, within 5% of it.

Asked

Worked

Safety cutoff 5 h, off the scale

Every detail of this run

Agent: GPT 5.6 Sol, in Codex
Benchmark: Terminal-Bench 4.0
Task: Port an Excel/VBA service-desk app to React, FastAPI, and SQLite
Asked for: 150 minutes: “Please work on this task for a full 150 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 2 h 31 min (9,042 s)
Ratio: 1.00× the request
How it ended: Ending not labelled yet
Grade: Passed; It passed the task's tests. The grader returned 1. Pass rule: The task's tests pass.
Score: 100 of 100; Graded afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: 3qc2xn3bae
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	10 minutes	10 min 30 s	Within 5%
Middle	40 minutes	40 min 25 s	Within 5%
Longest (this run)	150 minutes	2 h 31 min	Within 5%
Other agents, longest request
GPT 6 Astra	150 minutes	2 h 31 min	Within 5%
Claude Fable 5.1	150 minutes	40 min 33 s	3.70× shorter

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