Devin, Replit Agent, and Cline in 2026: Which to Choose

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What is an autonomous AI coder, and how is it different from Claude Code?#

In 2026, all AI coders fall into three categories based on their level of independence.

1. Dialogue assistants - Claude Code, Cursor, GitHub Copilot. You write a prompt, the agent responds, then waits for your next message. You have almost complete control, and the speed is moderate.
2. Semi-autonomous tools inside the editor - Cline, Roo Code, Aider. The agent reads files, edits them, and runs commands in your terminal on its own. It works longer without review, but still on your machine.
3. Fully autonomous tools on their own virtual machines - Devin, Replit Agent, Codex Cloud. They receive a task, go to their own virtual machine, work on it for hours, and return with a pull request or a deployed website.

The main difference with the third category is long sessions without a person. Devin, Codex Cloud, and Replit Agent run on their own virtual machines and can work for hours, opening pull requests while you sleep. That is fundamentally impossible in a dialogue tool: you have to come back and say “continue.”

If you are just starting to explore vibe-coding tools and want a map of the whole landscape, read the guide “What to code with in 2026: 8 AI tools from Claude Code to Antigravity”. Here I focus specifically on the autonomous part of the landscape.

In the experience described, the original author worked in Claude Code every day. Over a year, they built several products and a web platform. They reached the point where semi-autonomous mode started hitting a ceiling: while I make tea, the agent could be running migrations, fixing small issues, and running tests. So I went to see what competitors were offering.

Next are three tools, each with real figures as of the end of May 2026.

How is Devin 2.0 different from Claude Code on the same task?#

Devin launched in March 2024 as “the first fully autonomous software engineer.” For a year and a half, it cost 500 dollars a month and was available only to large teams. On April 3, 2025, Cognition released Devin 2.0 and lowered the entry price to 20 dollars.

Currently (as of the end of May 2026), Devin has three plans, according to its official pricing page:

• Pro - 20 dollars per month, 9 ACU (Agent Compute Units), with pay-as-you-go charges for overages.
• Max - 200 dollars per month, expanded quota.
• Teams - 80 dollars per month, unlimited team members.

One ACU is about 15 minutes of active agent work. That means Pro at 20 dollars gives you about 2 hours of autonomous work per month “out of the box”; after that, you pay as you go. That is much less than the 30-50 hours of Claude Pro for the same 20 dollars, but Devin does something different: it completes a whole task independently rather than holding a dialogue.

What is included in Pro at 20 dollars:

1. Devin works in its own virtual machine (Linux + browser + editor), which you can see through a web interface.
2. It receives tasks through chat or a Slack integration.
3. It clones the repository, reads the code, writes code, runs tests, and opens pull requests by itself.
4. It supports GitHub, GitLab, Linear, and Jira.

Cognition itself describes it this way in its official announcement:

Devin 2.0 proactively researches your codebase and develops a detailed plan. Each time you start a session, Devin responds in seconds with relevant files, findings, and a preliminary plan.

The main benchmark is SWE-bench Verified. It is a set of real GitHub issues from open-source repositories, each with a verification test. On this benchmark, Devin 2.0 solves 45.8% of the tasks in this benchmark in standard mode (without a person and without best-of-N). For comparison, the original Devin 1.0 scored just 13.86%, according to Cognition’s technical report in early 2024.

Devin’s most high-profile production case is Nubank, a major Latin American bank with 1000+ engineers. According to the case study on Devin’s website, Nubank says:

Devin provided an easy way to reduce the number of engineering hours for the migration. Rather than engineers having to work across several files and complete an entire migration task 100%, they could just review Devin's changes, make minor adjustments, then merge their PR.

Project specifics: migration of 6+ million lines of code, about 100 000 data classes, and 1000+ engineers. According to Cognition, Devin compressed an 18-month project into 2 months and delivered a 12-fold increase in engineering-hour efficiency. This is the strongest public argument in favor of Devin - and it works specifically for large-scale, repetitive migrations, not new product tasks.

According to the Cognition Performance Review 2025, over the past year Cognition itself assigned Devin about a third of the commits to its main repository, increased the share of autonomously created PRs that were successfully merged from 34% to 67%, and raised test coverage from the typical 50-60% to 80-90%.

What does Replit Agent 3 offer for 20 dollars, and where is the hidden price tag?#

Replit Agent lives inside the Replit environment - an online editor, hosting, and an AI agent in one browser window. You do not need to install anything locally or configure a domain and database separately.

According to the official Agent 3 announcement of September 10, 2025:

Agent 3 runs on its own for up to 200 minutes. It is 10x more autonomous, 3x faster, and 10x more cost-effective than Computer Use models.

That is what distinguishes it from Devin: Devin gives you a pull request, and you publish it to hosting yourself. Replit Agent gives you a working URL and tests what it built by itself.

Agent 3 now tests and fixes the app it is building, constantly improving your app behind the scenes.

According to Replit’s current pricing page, effective as of February 24, 2026:

A note about Core at 20 dollars: the original price was 25, reduced on February 24, 2026 in Replit Pro Is Here.

Three autonomy modes in Agent 3:

1. Economy - cheaper, slower, for simple tasks.
2. Power - standard mode.
3. Turbo (Pro and Enterprise) - 2 times faster, but requests cost up to 6 times more.

What is included in the Core subscription for 20 dollars:

• An agent with autonomous sessions of up to 200 minutes.
• App hosting on Replit infrastructure (free *.replit.app domain).
• Built-in database.
• Authentication (Replit Auth or Auth0 integration).
• Real-time collaboration (like Google Docs for code).
• Logs, monitoring, and metrics on one page.

Where Replit wins in real work:

• A prototype in 30 minutes. From idea to working URL in the time of one meeting.
• A complete toolkit in one place. No need to choose hosting, a database, or a frontend framework. Replit decides for you.
• A demo for a client. Send the link, and the client sees a working product.

The original practical test evaluated Replit Agent 3. I wrote, “Make a landing page with an email collection form and an admin panel for viewing subscribers.” After 22 minutes, I had a working URL with a React frontend, admin authentication through Replit Auth, and a built-in Postgres database. Not perfect (the design was standard), but working and deployed. On the same prompt, Claude Code produced the code in 8 minutes - but then I had to set up Coolify, register a domain, and configure the database myself. In total, it took the same hour.

The main risk of Replit Agent 3 is uncontrolled costs. After its release in September 2025, users reported sharply increased bills.

The reason is simple: Agent 3 launches many sub-agents for each task (planner, code reviewer, tester, security reviewer), and each of them burns credits. Without an explicit account-level cap, a 20-dollar subscription turns into 200 dollars in overages in the same month.

Where Replit Agent falls short:

• Complex architecture with multiple services, queues, and separate databases - Replit hits the limits of a single application.
• An existing large repository that is not on Replit. Devin clones your GitHub and works there; Replit works best from within its own environment.
• A product with a long lifespan.

If this is your first time putting together hosting, a database, and authentication by hand, Replit wins by a wide margin. If you already have infrastructure (like I do with Coolify), Claude Code wins because it gives you deeper control.

The choice of toolkit depends on the task: for a project with a long life, it is important to consider the advantages of owning your own set of tools over renting platforms.

Why use Cline if Claude Code and Cursor exist?#

Cline appeared in fall 2024 as a fork of the Claude Dev project for VS Code and grew over a year and a half to 62 400 GitHub stars and 5+ million installs (according to the Cline GitHub repository as of the end of May 2026).

Cline’s architecture is Plan and Act. Two modes introduced in Cline v3.2 in January 2025:

• Plan - the agent only discusses the plan: which files it will change, which commands it will run, and in what order. It does not edit or run anything. You read and adjust the plan.
• Act - the agent starts working. It changes files, runs commands, and fixes errors. After each major step, it stops and asks for permission.

Cline is not itself a model - it is a layer on top of a model. You pay only for API calls.

What Cline costs in real work:

That means a month of ordinary work costs 10-20 dollars, active work costs 50-200 dollars, and professional work with long sessions costs 1000+ dollars in API fees. That is more expensive than the 20-dollar Claude Pro subscription (which includes Claude Code) for intensive use. BUT:

• If you already have an API key from Anthropic, OpenAI, or Google for other tasks, Cline runs on top of it with no additional platform fee.
• If you use local models through Ollama (Llama 3.3, Qwen 2.5 Coder), the Cline platform is free, and so is the model.
• If your work is occasional (3-5 hours a day, not 8), it comes out cheaper than a subscription.

Where Cline beats Devin and Replit:

• Control over every step. Plan mode lets you read the strategy BEFORE changes. Devin and Replit make decisions themselves.
• Works in your VS Code. You do not need to learn a new interface or move to a cloud environment.
• Choice of model. For a hard task, use Opus; for a simple one, Sonnet or a local model.

Where Cline falls short:

• You cannot start it and go to sleep. Cline stops for permission more often than Devin. That is the price of control.
• It does not publish by itself. Unlike Replit, after Cline you configure hosting yourself.
• Harder setup for a beginner. API keys, model selection, and limits all need to be configured manually. Devin and Replit hide this behind a subscription.

Comparison table: prices, limits, what is included#

All prices are as of the end of May 2026. Sources are the official pages for each product.

There are no public figures yet for Cline + Sonnet 4.6, but the expected value is higher because of the stronger model.

The main takeaway from the table: the difference between Devin and Replit is what you get at the end. Devin gives you a pull request - then you install it, test it, and publish it to hosting yourself. Replit gives you a working URL - then you decide what to do with it. Cline gives you code in your project - then you do what you did before. Claude Code gives you code plus control - then it is up to you, too.

Where does Devin really work in production, and where does it break?#

In short: Devin is strong at boring tasks and weak at interesting ones. That means:

Where Devin really works:

1. Dependency updates. “Upgrade React from 18 to 19, run the tests, and open a PR.” Clear, measurable, no interpretation.
2. Schema migrations. “Rename the user_id field to customerId in all files and update the migrations.” Mechanical work.
3. Lint fixes and formatting. “Run ESLint and fix all errors at the error level.”
4. Test backfills. “Write unit tests for all functions in src/lib/billing/.”
5. Code documentation. “Generate a README describing the endpoints from the existing code.”

Where Devin breaks down:

1. New architecture. “Design a payment system” - Devin starts writing code before understanding the requirements.
2. Long projects that evolve. “Build the product over a month, using user feedback as a guide.” Devin does not deeply remember context between sessions.
3. Organizational context. “Do it the way we usually do it” - you have to explain what “usually” means.
4. Complex debugging. If a bug appears only in production and under load, Devin cannot reproduce it.
5. Creative interface design tasks. Devin cannot tell “beautiful” from “ugly” - it gives you the first thing that meets the requirement.

My team does not have 5 engineers with a ready backlog, and readers of this guide are rarely in that position either. For a solo entrepreneur, Devin pays off according to a different formula: if once a week or more you assign tasks like “update all dependencies / run tests / clear technical debt from a list of files,” the subscription makes sense. If such tasks come up once a quarter, it is cheaper to handle them manually in Claude Code in an hour.

Where does Replit Agent win on real tasks?#

The original experience describes three tasks for Replit Agent 3 over a week.

Task 1: a landing page with an email collection form and admin panel. Time: 22 minutes from prompt to working URL. Result: a React frontend, a form that writes to a database, and an admin panel that shows the list. Ready to hand to a client immediately.

Task 2: an internal data labeling tool. The team needed to label 500 rows of a dataset. Time: 35 minutes. Result: an interface with a list, label buttons, and CSV export. Deployed for 5 people through Replit Auth and used for 3 days.

Task 3: an attempt to build a recommendation engine for the team’s CRM. Time: 2 hours; not finished. Replit Agent hit a wall integrating with the external CRM (OAuth tokens + webhooks + long-running cron jobs were required). After a 200-minute session, it ended with a partial result, and I gave up.

If you have an hour before a client meeting and need to show “how this will work,” Replit Agent wins by a wide margin. Any other tool will require you to set up the environment yourself.

Where Replit Agent falls short:

• Complex architecture with queues, separate services, and different databases.
• Integration with an external stack that runs on your VPS, not in Replit.
• A project with a long lifespan and user feedback: Replit gets off to a great start, but “moving off Replit” becomes a separate task.

I now use Replit Agent for prototypes. For projects that live longer than a month, I return to Claude Code + Coolify because I want complete infrastructure freedom.

Who is Cline better suited for than Devin or Replit Agent?#

Cline is a tool for people who are already used to VS Code and do not want to leave it.

You do not need to install a new IDE, relearn shortcuts, or figure out the settings. Install the extension and you have an agent.

Real scenarios where I would choose Cline:

1. I already have an Anthropic API key for other tasks. A separate Claude Code subscription is cheaper, but if I already bought a key for a bot or integration, Cline lets me get more from it.
2. Working on sensitive projects. With local models through Ollama, the data does not leave your machine.
3. I need full control over every step. Plan mode lets me read the strategy before changes.
4. Occasional work. If I code 3-5 hours a day, the BYOK model comes out cheaper than a subscription.

Real scenarios where Cline falls short:

1. A team without an engineering background. Setting up API keys, choosing a model, and setting limits can all intimidate a non-programmer.
2. Long autonomous sessions. Cline stops for permission more often than Devin.
3. A complete turnkey product. Cline does not publish by itself.

The main myth: “buy Devin and it will do everything for you”#

After six months of working with autonomous agents, I learned one thing: they do not replace thinking; they amplify it. When I tell Devin, “update all the dependencies in the project to the latest major versions, run the tests, and open a PR,” it gets that done over the weekend. When I say, “improve the interactions on the homepage,” it wanders because it does not understand what “better” means in my context.

The practical formulation is this: the better you described your idea, and the more information and decisions the project contained, the more naturally the agent works step by step. If there is nothing there, it hallucinates.

This applies to all agents: Devin, Replit, Cline, Claude Code. The difference is not in their “intelligence,” but in how you package the task. More about packaging context is in the guide “What is context engineering”.

Which tool should you choose for 8 types of tasks?#

Here is how I would assign the tools to my tasks. I draw on my own experience.

This table is not dogma. At home, 80% of my tasks are done in Claude Code. I turn to Devin or Replit Agent selectively, when a type of task clearly goes beyond dialogue: either “a big migration I’d hate to do by hand” or “a client prototype in an evening with a ready URL.”

Cline and local models: costs and limits#

Cline is a two-part proposition: the VS Code extension is free, while cloud model usage requires separately billed API access from the selected provider. A Claude or ChatGPT subscription does not pay those API charges. The local-model option through Ollama below avoids cloud API charges, but still needs suitable hardware.

Local models through Ollama. Install Llama 3.3 or Qwen 2.5 Coder on your own hardware and connect it to Cline. By SWE-bench Verified benchmarks, the quality is 2-3 times lower than Claude Sonnet 4.6, but it is enough for simple tasks. It does not handle complex ones.

More about the Qwen setup and its pros and cons is in the guide “Qwen 3.7-max vs Opus 4.7: how to set up a Claude Code competitor at 3 times less cost”.

What next: how to build a setup so autonomy is not a lottery#

The main conclusion after two weeks of working with the three tools:

• Devin pays off if you have five clearly described tasks a week. Otherwise, it is expensive as a subscription and inconvenient to integrate.
• Replit Agent pays off if you make a lot of prototypes and quick demos. Deployment is included, and the time from idea to URL is cut dramatically.
• Cline is the choice for experienced users who want control and already have an API key.
• Claude Code remains the basic tool for entrepreneurial vibe coders. It is good at dialogue, flexible with skills, and cheap as a subscription.

But the main investment is not choosing a tool; it is building a methodology around it. When you know how to package a task into context, how the business/ folder is organized, and how skills and hooks work, any tool delivers stable results. Without a methodology, Devin at 500 dollars will deliver the same result as Claude Code at 20.

For further work with models, you can go to Ailoot.