PAN @ CLEF 2026: Shared Tasks on Authorship Analysis, Computational Ethics, and Originality Call for Participation

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We'd like to invite you to participate in the following shared tasks at PAN
2026 held in conjunction with the CLEF conference in Jena, Germany.

1. Voight-Kampff Generative AI Detection.
Given a (potentially obfuscated) text, decide whether it was written by a
human or an AI.
https://pan.webis.de/clef26/pan26-web/generated-content-analysis.html

2. Text Watermarking.
Insert a watermark into a given text. Then, after we have attacked the
text, detect the inserted watermark.
https://pan.webis.de/clef26/pan26-web/text-watermarking.html

3. Multi-Author Writing Style Analysis.
Given a document, determine at which positions the author changes.
https://pan.webis.de/clef26/pan26-web/style-change-detection.html

4. Generative Plagiarism Detection.
Given a document and a collection of documents, your task is to identify
all sources in the collection that the document plagiarizes.
https://pan.webis.de/clef26/pan26-web/generated-plagiarism-detection.html

5. Reasoning Trajectory Detection.
Detect the source and safety of LLM-generated and human-written reasoning
trajectories.
https://pan.webis.de/clef26/pan26-web/reasoning-trajectory-detection.html

More information:
https://pan.webis.de/clef26/pan26-web/index.html


Important Dates
--------------------------
now                    Training Data Released
April        23, 2026: Registration closes
May          07, 2026: Software submission deadline
May          28, 2026: Participant paper submission
June         30, 2026: Peer review notification
July         06, 2026: Camera-ready participant papers submission
September 21-24, 2026: CLEF Conference


Links
--------------------------
PAN:     https://pan.webis.de
Contact: [email protected]

We are looking forward to your submission!
The PAN team

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<div dir=3D"ltr">We&#39;d like to invite you to participate in the followin=
g shared tasks at PAN 2026 held in conjunction with the CLEF conference in =
Jena, Germany.<br><br>1. Voight-Kampff Generative AI Detection.<br>Given a =
(potentially obfuscated) text, decide whether it was written by a human or =
an AI.<br><a href=3D"https://pan.webis.de/clef26/pan26-web/generated-conten=
t-analysis.html">https://pan.webis.de/clef26/pan26-web/generated-content-an=
alysis.html</a><br><br>2. Text Watermarking.<br>Insert a watermark into a g=
iven text. Then, after we have attacked the text, detect the inserted water=
mark.<br><a href=3D"https://pan.webis.de/clef26/pan26-web/text-watermarking=
.html">https://pan.webis.de/clef26/pan26-web/text-watermarking.html</a><br>=
<br>3. Multi-Author Writing Style Analysis.<br>Given a document, determine =
at which positions the author changes.<br><a href=3D"https://pan.webis.de/c=
lef26/pan26-web/style-change-detection.html">https://pan.webis.de/clef26/pa=
n26-web/style-change-detection.html</a><br><br>4. Generative Plagiarism Det=
ection.<br>Given a document and a collection of documents, your task is to =
identify all sources in the collection that the document plagiarizes.<br><a=
 href=3D"https://pan.webis.de/clef26/pan26-web/generated-plagiarism-detecti=
on.html">https://pan.webis.de/clef26/pan26-web/generated-plagiarism-detecti=
on.html</a><br><br>5. Reasoning Trajectory Detection.<br>Detect the source =
and safety of LLM-generated and human-written reasoning trajectories.<br><a=
 href=3D"https://pan.webis.de/clef26/pan26-web/reasoning-trajectory-detecti=
on.html">https://pan.webis.de/clef26/pan26-web/reasoning-trajectory-detecti=
on.html</a><br><br>More information:<br><a href=3D"https://pan.webis.de/cle=
f26/pan26-web/index.html">https://pan.webis.de/clef26/pan26-web/index.html<=
/a><br><br><br>Important Dates<br>--------------------------<br>now =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Training Data=
 Released<br>April =C2=A0 =C2=A0 =C2=A0 =C2=A023, 2026: Registration closes=
<br>May =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A007, 2026: Software submission dea=
dline<br>May =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A028, 2026: Participant paper =
submission<br>June =C2=A0 =C2=A0 =C2=A0 =C2=A0 30, 2026: Peer review notifi=
cation<br>July =C2=A0 =C2=A0 =C2=A0 =C2=A0 06, 2026: Camera-ready participa=
nt papers submission<br>September 21-24, 2026: CLEF Conference<br><br><br>L=
inks<br>--------------------------<br>PAN: =C2=A0 =C2=A0 <a href=3D"https:/=
/pan.webis.de">https://pan.webis.de</a><br>Contact: <a href=3D"mailto:pan@w=
ebis.de">[email protected]</a><br><br>We are looking forward to your submission!=
<br>The PAN team<br><br></div>
<br>
<hr>
<p align=3D"center">To unsubscribe from the IR list, click the following link:<br>
<a href=3D"https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=3DIR&A=3D1" target=3D"_blank">https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=3DIR&A=3D1</a>
</p>

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