Codex Is Starting to Control the Computer. What Does That Mean for the Future?

Wed, 29 Apr 2026 11:28:25 +0800

The most important part of this Codex update is not that it added another ordinary button. It is that Codex is starting to move toward “controlling the computer.”

In the past, using AI usually meant asking questions in a chat box, copying, pasting, and then manually operating software.
Now that boundary is expanding: AI does not just answer you. It can operate desktop applications according to your goal.

In the short term, this is a new feature. In the long term, it may change how many people use computers.

What This Feature Is

Simply put, Codex’s computer use capability lets it access and operate the desktop environment.

It can do things such as:

select and control an application
receive tasks in natural language
open browsers, AI tools, local files, or other software
enter text, click buttons, and wait for results
connect multiple steps into one task
keep running in the background without requiring the user to follow every step manually

Its role is not just to write a piece of text for you, but to complete an operation flow for you.

That is the key difference between an Agent and an ordinary chatbot:
a chatbot mainly gives answers; an Agent is closer to “receiving a goal and then executing it.”

Why This Matters

In the past, much automation required you to know how to write scripts.

For example, suppose you want to complete a cross-software workflow:

open a web page
find information
copy content
pass it to another AI tool
save a file
open the local directory and check the result

To automate this traditionally, you might need browser scripts, APIs, local programs, and even window automation.

But many ordinary users do not know how to write these things.
Even if they do, it may not be worth writing a script for a temporary task.

This is where computer use matters: it pushes “script-like capability” toward natural language.

You do not necessarily need to tell it exactly where to click.
You can tell it what result you want and let it try to complete the task.

Workflows It May Change

I think the first workflows to change will not be extremely serious or high-risk work, but the tasks that are annoying, fragmented, repetitive, and not worth writing a dedicated program for.

1. Moving Information Across Software

The most typical case is moving information between applications.

Previously, you might switch back and forth between a browser, a document, a chat window, and a local folder.
In the future, you can hand this kind of task to an Agent:

find a certain kind of information
summarize it into a document
save it to a specified directory
open the result for you to review

This work is not hard, but it consumes attention.
The value of an Agent is that it absorbs these small operations.

2. Coordination Between Multiple AI Tools

Many people’s real workflow is no longer based on a single AI tool.

It may look like this:

one tool writes code
one tool researches information
one tool generates images
one tool organizes documents

Previously, these tools were connected by manual copy and paste.
In the future, an Agent can become the middle layer: it opens tools, passes context, waits for output, and organizes results.

This can turn “multiple AI tools working together” from a manual process into a semi-automated process.

3. Office Software Automation

Spreadsheets, presentations, documents, and email share one trait: they are powerful, but many operations are fragmented.

If Agents can reliably control this software, the barrier to office automation will drop noticeably.

You do not need to remember where a menu is or learn complicated shortcuts.
You only need to describe the goal, such as:

turn this spreadsheet into a monthly report
make a one-page summary from this document
combine these materials into a clearly structured explanation

The tedious button operations will gradually be hidden behind natural language.

What It Means for Ordinary Users

For ordinary users, this kind of feature may have a more direct impact than “the model got a bit smarter.”

Because it lowers the operation barrier, not just the knowledge barrier.

Many people can describe what they want, but they do not know where to click or how to combine features inside software.
If Agents can take over this part, using a computer may become:

1
2
3

I describe the goal
Agent operates the software
I check the result

That is closer to real productivity than simple chat.

Its Impact on Software

If this kind of Agent capability continues to mature, software itself will also be affected.

In the past, software design mainly served human clicking.
In the future, software may also need to serve Agent operation.

This means:

interface elements need to be clearer
operation feedback needs to be more stable
local permissions need to be more granular
software may provide interfaces better suited for Agent calls
users may care more about whether software can be operated smoothly by AI

In the long run, the boundaries between applications may become thinner.
Users may care less about “which app should I open” and more about “what task do I want to complete.”

Do Not Overhype It Yet

Of course, it is not time to fully let go yet.

This kind of capability still has several clear limitations:

stability still needs observation
complex tasks may fail in the middle
permission boundaries must be handled carefully
account, payment, and file deletion operations should not be delegated casually
quota consumption is not something you can completely ignore

So at this stage, the best use case is not letting it take over the whole computer, but letting it handle low-risk, reviewable, step-heavy tasks.

For example:

organizing materials
generating drafts
moving content across tools
opening and checking files
running semi-automated workflows that can be reviewed by a human

One Last Line

The real importance of this Codex update is that it pushes AI from “answering questions” toward “operating the environment.”

In the short term, it is a computer use feature.
In the long term, it may mark a shift in how personal computers are used.

In the future, we may spend less time remembering buttons, finding menus, and switching windows.
More often, we will describe the goal, let an Agent execute it, and then let humans make the final judgment.

Computer Use on KnightLi Blog