Four tools, two companies, and names that seem designed to be confused. Most comparisons of them are written by developers for developers, which is not much use if your working day is documents, spreadsheets and email rather than code.
This is the plain version, as the tools stand in September 2026. They change monthly, so treat anything about specific features as a snapshot and check each product’s own page before you commit.
The question that decides it
Ask what the job ends in.
- A conversation, a draft, an answer. The Claude chat app is enough. Most people already use it this way, and most people stop here.
- A finished document, spreadsheet or file on your own computer. That is what Cowork is for.
- Working software. That is Claude Code or Codex.
Almost every confusion between these tools comes from skipping that question and comparing feature lists instead.
What each one is for
Claude is Anthropic’s chat assistant, in a browser, a desktop app or on your phone. You ask, it answers, and you carry the result wherever it needs to go. Good for thinking, drafting and one-off tasks. It is not where multi-step work gets done on your behalf.
Cowork is Anthropic’s agent for people who do not write code. It lives in the Claude desktop app and works on the files and folders on your own computer: give it a task, and it goes off and produces the finished document, deck or spreadsheet rather than a reply in a chat window. If your work is documents rather than code, this is the one to learn first.
Claude Code is Anthropic’s agentic coding tool. It works across a whole codebase, reading files, making changes and running commands, and it began in the terminal before spreading into code editors and the desktop app. It is the developer’s tool. Some non-developers use it anyway, because the same approach that builds software also builds quite serious automation, but it assumes you are comfortable working in a codebase.
Codex is OpenAI’s agent. It started as a coding agent - in the terminal, in code editors, and in a cloud version you hand tasks to and check back on later - and OpenAI has since widened it beyond code. If your organisation lives in ChatGPT, it is the natural counterpart to the Claude tools.
If you do not write code
Start with whichever agent comes with the subscription you already pay for. That is Cowork if you are on a paid Claude plan, and Codex if you are on ChatGPT. Switching subscriptions to chase a feature is rarely worth it: the differences between the leading tools matter far less than whether you have a workflow worth running in any of them.
Skip Claude Code until you have a reason. It is excellent, and it is the wrong first step for someone whose work does not end in software.
The reason, when it arrives, is usually that you want to build something rather than automate something: an idea you would like running on the internet rather than a task you would like to stop doing by hand. That is a different day’s work, and what stands between the code an agent writes and something live is mostly not code.
The part that does not change
The tools will look different by next spring. What carries across all four is the part underneath: choosing a task worth automating, breaking it into steps that each do one thing, and deciding where a human needs to stay in the loop. Someone who can do that picks up any new tool in an afternoon. Someone who learned one app’s buttons starts again every time it changes.
Where this gets practical
The Oxford Agentic Bootcamp covers where each of these tools fits as part of the day, and then spends most of it building: you bring one real task and leave with a working agentic workflow running against it. Cohort 3 runs on 19 November at Worcester College. No coding required.
If the thing you want is software rather than a workflow, the Oxford Agentic Coding Bootcamp is the one for that: Claude Code and Codex do the typing, and the day is spent on the workbench around them. It runs on 26 November, also at Worcester College.