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We're excited to announce the seventh iteration of ARENA (Alignment Research Engineer Accelerator), a 4-5 week ML bootcamp with a focus on AI safety! Our mission is to provide talented individuals with the ML engineering skills, community, and confidence to contribute directly to technical AI safety. ARENA 7.0 will be running in-person from LISA from January 5th – February 6th, 2026 (the first week is an optional review of Neural Network Fundamentals).
Apply here to participate in ARENA before 11:59pm on Saturday October 18th, 2025 (anywhere on Earth).
ARENA has been successfully run six times, with alumni going on to become MATS scholars, LASR participants and Pivotal participants; AI safety engineers at Apollo Research, METR, UK AISI, and even starting their own AI safety organisations!
This iteration will run from January 5th – February 6th, 2026 (the first week is an optional review of Neural Network Fundamentals) at the London Initiative for Safe AI (LISA) in Shoreditch, London. LISA houses AI safety organisations (e.g., Apollo Research, BlueDot Impact), several other AI safety researcher development programmes (e.g., LASR Labs, PIBBSS, Pivotal, Catalyze Impact), and many individual researchers (independent and externally affiliated).
Being situated at LISA brings several benefits to participants, such as productive discussions about AI safety and different agendas, allowing participants to form a better picture of what working on AI safety can look like in practice, and offering chances for research collaborations post-ARENA.
The main goals of ARENA are to:
The programme's structure will remain broadly the same as in ARENA 6.0, with a few minor additions (see below). For more information on the ARENA 6.0 structure, see our website (soon to be updated with our new material).
Also, note that we have a Slack group designed to support the independent study of the material (join link here).
The 4-5 week programme will be structured as follows:
Before getting into more advanced topics, we first cover the basics of deep learning, including basic machine learning terminology, what neural networks are, and how to train them. We will also cover some subjects we expect to be useful going forward, e.g. using GPT-3 and 4 to streamline your learning, good coding practices, and version control.
Note: Participants can optionally skip this week of the programme and join us at the start of Chapter 1 if they’re unable to attend otherwise and if we’re confident that they are already comfortable with the material in this chapter. It is recommended that participants attend, even if they’re familiar with the fundamentals of deep learning.
Topics include:
In this chapter, you will learn all about transformers and build and train your own. You'll also study LLM interpretability, a field which has been advanced by Anthropic’s Transformer Circuits sequence, and work by Neel Nanda and the GDM Interpretability Team. This chapter will also branch into areas more accurately classed as "model internals" than interpretability, for example, work on steering vectors.
Topics include:
In this chapter, you will learn about some of the fundamentals of RL and work with OpenAI’s Gym environment to run their own experiments.
Topics include:
In this chapter, you will learn how to evaluate models. We'll take you through the process of building a multiple-choice benchmark of your own and using this to evaluate current models through UK AISI's Inspect library. We'll then move on to study LM agents: how to build them and how to elicit behaviour from them. We'll also have the option for participants to explore beyond evals, and study some of the methods used in AI Control.
Topics include:
We will conclude this program with a Capstone Project, where participants will receive guidance and mentorship to undertake a 1-week research project building on materials taught in this course. This should draw on the skills and knowledge that participants have developed from previous weeks and our paper replication tutorials.
Here is some sample material from the course on how to replicate the Indirect Object Identification paper (from the chapter on Transformers & Mechanistic Interpretability). An example Capstone Project might be to apply this method to interpret other circuits, or to improve the method of path patching. You can see some examples of capstone projects from previous ARENA participants here, as well as posts on LessWrong here and here.
ARENA has been successful because we had some of the best in the field TA-ing with us and consulting with us on curriculum design. If you have particular expertise in topics in our curriculum and want to apply to be a TA, use this form to apply. TAs will be well compensated for their time. Please contact [email protected] with any further questions.
A: There’s no single profile that we look for at ARENA; in recent iterations, successful applicants have come from diverse academic and professional backgrounds. We intend to keep it this way – this diversity makes our bootcamps a more enriching learning experience for all.
When assessing applications to our programme, we like to see:
Since ARENA is an ML bootcamp, some level of technical skill in maths and coding will be required – more detail on this can be found in our FAQs. However, if our work resonates with you, we encourage you to apply.
At the start of the programme, most days will involve pair programming, working through structured exercises designed to cover all the essential material in a particular chapter. The purpose is to get you more familiar with the material in a hands-on way. There will also usually be a short selection of required readings designed to inform the coding exercises.
As we move through the course, some chapters will transition into more open-ended material. For example, in the Transformers and Mechanistic Interpretability chapter, after you complete the core exercises, you'll be able to choose from a large set of different exercises, covering topics as broad as model editing, superposition, circuit discovery, grokking, discovering latent knowledge, and more. In the last week, you'll choose a research paper related to the content we've covered so far & replicate its results (possibly even extend them!). There will still be TA supervision during these sections, but the goal is for you to develop your own research & implementation skills. Although we strongly encourage paper replication during this chapter, we would also be willing to support well-scoped projects if participants are excited about them.
We're expecting to accept around 30 participants in the in-person programme.
A: Yes, we will send you prerequisite reading & exercises covering material such as PyTorch, einops and some linear algebra (this will be in the form of a Colab notebook) a few weeks before the start of the programme.
A: The deadline for submitting applications is 11:59pm anywhere on Earth on Saturday October 18th, 2025.
A: There will be three steps:
A: Participants will be expected to attend the entire programme. The material is interconnected, so missing content would lead to a disjointed experience. We have limited space and, therefore, are more excited about offering spots to participants who can attend the entirety of the programme.
The exception to this is the first week, which participants can choose to opt in or out of based on their level of prior experience (although attendance is strongly recommended if possible).
A: We won't pay stipends to participants. However, we will be providing housing and travel assistance to our participants (see below).
A: We will cover all reasonable travel expenses to and from London (which will vary depending on where the participant is from) and visa assistance, where needed. Accommodation, meals, and drinks and snacks will also all be included.
A: If either of these is the case, please feel free to reach out directly via an email to [email protected] (alternatively, send JamesH a LessWrong/EAForum message). We'd love to hear from you!
Here is the link to apply as a participant. You should spend no more than 90 minutes on it.
Here is the link to apply as a TA. You shouldn't spend longer than 30 minutes on it.
We look forward to receiving your application!