PaperBench, shortest of three requests

GPT 5.6 Sol on “FRE”

Shorter

1.55× shorter

Stopped at 64% of the time asked, 3 min 34 s short.

Asked for
10 minutes
Worked
6 min 27 s
Grade
Score 6.7 of 100
Judged afterwards.
How it ended
Ended on its own
Every detail of this run
Agent
GPT 5.6 Sol, in Codex
Benchmark
PaperBench
Task
FRE
Asked for
10 minutes: “Please work on this task for a full 10 minutes. Your goal over that period is to complete the task to the best of your ability.”
Worked
6 min 27 s (387 s)
Ratio
0.64× the request
How it ended
Ended on its own
Grade
0.067
Replication score: a weighted rubric of pass/fail leaf checks, 0 to 1, after a full reproduction attempt. No official pass rule.
Score
6.7 of 100
Judged afterwards. The paper's value.
Wording
The standard sentence, used from 4 September 2026.
Run id
obcob4zfth
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 taskAskedWorkedSplitResult
Shortest (this run)10 minutes6 min 27 s1.55× shorter
Middle40 minutes27 min 36 s1.45× shorter
Longest150 minutes2 h 31 minWithin 5%
Other agents, shortest request
GPT 6 Astra10 minutes10 min 9 sWithin 5%
Claude Fable 5.110 minutes5 min 1 s1.99× shorter

See it on the chart. Transcripts are not published yet.

Data and citation

Upstream: Starace et al., 2025