Terminal-Bench 4.0, middle of three requests

GPT 5.6 Sol on “Recalculate SA-CCR exposure, RWA, capital, and workbook evidence”

Shorter

1.58× shorter

Stopped at 63% of the time asked, 5 min 32 s short.

Asked

Worked

Safety cutoff 2 h, off the scale

Every detail of this run

Agent: GPT 5.6 Sol, in Codex
Benchmark: Terminal-Bench 4.0
Task: Recalculate SA-CCR exposure, RWA, capital, and workbook evidence
Asked for: 15 minutes: “Please work on this task for a full 15 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked: 9 min 28 s (568 s)
Ratio: 0.63× 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 afterwards. The paper's value.
Wording: The standard sentence, used from 4 September 2026.
Run id: ktw73ru4k6
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	4 minutes	21 min 46 s	5.44× longer
Middle (this run)	15 minutes	9 min 28 s	1.58× shorter
Longest	60 minutes	1 h 1 min	Within 5%
Other agents, middle request
GPT 6 Astra	15 minutes	15 min 31 s	Within 5%
Claude Fable 5.1	15 minutes	15 min 40 s	Within 5%

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Data and citation