A Complete Walkthrough of the Max Planck CaCTüS AI Research Internship 2027

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If you are an engineering, computer science, or data-focused student or graduate looking for a fully funded way to gain real research experience in Germany, the CaCTüS internship deserves a permanent spot on your calendar. CaCTüS stands for Computation and Cognition Tübingen Summer Internship, and it is one of the few programs in the world built specifically for students whose personal, financial, or regional circumstances have made it hard to access top-tier research opportunities. Below, you will find a full breakdown of what the program offers, who qualifies, how the application works, and the dates you need to track for the 2027 cycle.

What Is CaCTüS, Exactly?

CaCTüS is a three-month, fully funded research internship hosted jointly by the Max Planck Institute for Biological Cybernetics, the Max Planck Institute for Intelligent Systems, and the Tübingen AI Center, all based in Tübingen, Germany, with a few projects running at the Stuttgart site. Each year, the program selects up to ten students at the Bachelor’s or Master’s level to work directly with leading scientists on research spanning machine learning, electrical engineering, theoretical neuroscience, behavioral experiments, robotics, and data analysis.

What sets CaCTüS apart from a typical research internship is its mission. The program was created for young scientists who are held back by personal or societal constraints. Since its first cohort arrived in 2022, the program has welcomed students from countries including Nigeria, Cameroon, India, Indonesia, the Philippines, Ethiopia, Sudan, Argentina, and many others.

Quick Facts Table

Detail Information
Program name CaCTüS (Computation and Cognition Tübingen Summer Internship)
Host institutions Max Planck Institute for Biological Cybernetics, Max Planck Institute for Intelligent Systems, Tübingen AI Center
Location Tübingen, Germany (a small number of projects run in Stuttgart)
Duration 3 months (90 days, strictly, due to visa rules)
Typical internship window 1 July to 30 September
Number of places Up to 10 students per cohort
Monthly stipend Approximately 1,350 euros, covering living costs, housing, and health insurance
Travel support Travel costs are compensated; visa fees are not covered
Applicant level Current Bachelor’s or Master’s students, and recent graduates who have not yet started a PhD
2027 application portal opens 19 October 2026 (expected, based on prior cycles)
2027 application deadline 16 November 2026 (expected, based on prior cycles)
Program start 1 July 2027
Official website projects.tuebingen.mpg.de

A quick note on the dates above: Max Planck has not yet published the formal 2027 timeline at the time of writing. The dates listed follow the pattern of previous cycles closely (for example, the 2026 portal opened on 16 October 2025 and closed on 21 November 2025), so treat them as a strong working estimate rather than a locked-in guarantee. Bookmark the official news page and check back once October 2026 arrives, because the real portal link and confirmed dates will appear there first.

Who Can Apply

According to the official eligibility page, you can apply if you meet the following conditions:

  • You have not yet started a PhD by the time the internship begins.
  • If you have not finished your Bachelor’s degree yet, you must have completed at least four semesters, which is two years, of study before the internship starts.
  • You have a strong academic record.
  • Your academic or professional background relates to one of the research areas, such as computer science, mathematics, physics, engineering, psychology, cognitive science, or neuroscience.
  • You have a good command of English, roughly equivalent to a TOEFL score of 95 or above, although no certificate is required.
  • You can clearly explain your motivation and the specific constraints that limit your access to high-quality research opportunities.
  • You are available for the full 90 days between 1 July and 30 September of the internship year, since you cannot legally extend your stay beyond that under the visa rules that differ from a standard work visa.
  • You are applying for a voluntary internship and not one required for course credit.

One detail that surprises many applicants is that recent graduates are absolutely welcome. The program’s own FAQ page states plainly that if you graduated with a master’s degree a few years ago and have not yet started a PhD, you remain eligible.

Looking for other research-focused internships abroad? You may also want to check this complete guide to CERN internships and graduate programmes, covering opportunities at the world’s largest physics laboratory.

What You Get as a CaCTüS Intern

This is a genuinely funded opportunity and here is what the program provides:

  • A monthly salary of roughly 1,350 euros, which fully covers living expenses, housing, and health insurance for the duration of your stay.
  • Compensation for your travel costs to and from Germany.
  • Help with accommodation, since the Internship Coordination Office arranges affordable housing for every intern rather than leaving you to search alone in an unfamiliar city.
  • A dedicated local buddy, usually a PhD student, who helps you settle into daily life.
  • Workshops on career counseling sessions and networking events designed to help you plan your next career step, whether that is a PhD, a job in industry, or further research — the kind of planning covered in guides on what to do after receiving a university admission offer.
  • Regular check-ins with the Coordination Office to discuss any concerns that come up during the program.

The only major cost the program does not cover is your visa application fee and related travel to the embassy.

Thinking about where a research internship like this could lead next? You may also want to check the Monash University PhD Scholarship in Privacy-Preserving AI for Video Analytics, a fully funded route for AI researchers.

The Kind of Research You Will Work On

Interns are matched to specific research projects proposed by the institutes at the time of application, covering areas such as machine learning, electrical and computer engineering, theoretical neuroscience, robotics, behavioral experiments, and data analysis.

You cannot bring your own independent project, and you apply directly to the projects published on the official project list for that year’s cycle, selecting up to two in order of preference.

Past interns have worked on everything from predictive motion algorithms for tracking zebrafish behavior to machine learning models supporting neuroscience research, so the range is genuinely broad for anyone with an engineering or data background.

How to Apply: Step by Step

The application only happens through the official CaCTüS portal. Here is what your application needs to include:

  • A motivational statement covering your general interest in a research career, a description of a previous project you have worked on, your motivation for up to two specific projects from the published list, and an honest statement about the personal, financial, or regional factors limiting your access to elite research institutions.
  • A CV, no longer than two pages.
  • An optional reference letter. It is not required, but it is considered if you choose to provide one.
  • Transcripts from every stage of your university studies, translated into English if your university does not provide an official English version, along with degree certificates where available.

Before you start, download the official application guide and the example CV template from the program’s application page. Once you submit, you should receive an automatic confirmation email. If that email does not arrive, your application was not properly completed, so check this carefully before the deadline passes.

🔗 Official CaCTüS Application Portal: Apply directly through the official CaCTüS registration portal

🔗 Official CaCTüS Website: Visit the official CaCTüS program website

Why This Program Matters, Especially for Students Outside Wealthy Countries

The Max Planck Society explicitly welcomes applications from students in low- and middle-income countries. If your access to research-heavy graduate programs or international labs has been limited by where you live or what you can afford, this program was designed with exactly your situation in mind, much like the broader options covered in this guide on how to find affordable universities abroad.

Already thinking about German study options beyond this internship? You may also want to check this guide to studying in Germany without IELTS on scholarship.

Tips for a Stronger Application

  • Be specific about your constraints. Vague statements about “limited opportunities” carry less weight than an honest account of your actual situation.
  • Match your project choice to your real skills. The selection committee evaluates fit carefully, so applying to a project because it sounds prestigious rather than because your background supports it tends to backfire — the same discipline that helps when you prepare for a scholarship interview.
  • Start your transcripts applications early.
  • Keep your CV to two pages and make every line relevant to research and coursework.

Looking for other prestigious fully funded routes after your internship? You may also want to check the Gates Cambridge Scholarship 2027/28.

Official Resources and Links

Frequently Asked Questions

Can I apply if I already graduated a few years ago?

Yes. The official FAQ confirms that graduating a couple of years earlier does not disqualify you, as long as you have not started a PhD by the time the internship begins.

Is the internship fully remote or virtual?

No. CaCTüS takes place entirely in person in Tübingen, with a few projects based in Stuttgart.

Do I need a specific degree subject to qualify?

Not strictly. The program does not apply rigid rules on which study programs count.

What happens if I cannot afford a reference letter or do not have one?

That is not a problem at all. A reference letter is entirely optional. If you submit one, it gets considered during selection, but its absence will not weaken your application in any formal sense. If you’d still like one lined up as a backup for other applications, such as the Chevening Scholarship or similar funded programs, it’s worth asking early.

Does the program cover visa costs?

No. The monthly salary covers your living expenses, housing, and health insurance, and travel costs are reimbursed separately, but visa application fees and related embassy trips are costs you must cover yourself.

Can I apply to more than one project to improve my chances?

You can apply to up to two projects, but doing so does not raise your odds.

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