Coding agent stack wars: what IT buyers should watch

The market for AI coding agents split further this year as Cursor, Anthropic's Claude Code, GitHub Copilot and OpenAI's Codex pursue different bets on how much autonomy a coding assistant should have inside a company's repositories. For IT buyers, the interesting differences are not in benchmark leaderboards but in where each tool runs, what access it needs, and how easy it is to audit or replace.

Four different bets on autonomy

Cursor built an AI-native fork of VS Code and has grown fastest with enterprise customers who want deep IDE integration and model choice — the product lets teams switch between underlying models rather than being locked to one. Claude Code is terminal-first: it reads a repository directly, runs shell and Git commands, and can split large changes across parallel subagents. GitHub Copilot remains the default in many enterprises because of governance features — IP indemnity, private-codebase model training and native VS Code/JetBrains integration — rather than raw capability. OpenAI's Codex serves teams already standardized on OpenAI's stack for asynchronous, longer-running tasks.

What actually changes for a buyer

The procurement questions that matter are about control surfaces, not rankings. Does the agent run locally on a developer's machine or in a vendor cloud, and what does that mean for where source code and secrets travel? What scope of repository and secrets access does it need, and can that scope be limited per project? How are its actions logged, so a security team can reconstruct what an agent changed and why? And if the vendor relationship sours, how expensive is it to move a team's workflow to a different tool?

Read the security and pricing pages, not the hype

Vendor comparison content — including this one — should be read as a starting point, not a verdict. Adoption figures, revenue run-rates and market-share claims move quickly and are usually self-reported by the vendor, not independently audited. The steadier signal is in each vendor's own security and admin documentation: what permissions an agent requests, what data it retains, and what an enterprise admin can turn off.

The practical takeaway for most IT teams is a mixed stack rather than a single winner: a governance-first tool such as Copilot for default rollouts, and a more autonomous tool such as Claude Code or Cursor for teams that need deeper repository access — with access scope, logging and exit cost decided in procurement, not left to whichever tool a team happened to install first.

Sources: GitHub Copilot plans and pricing, daily.dev — the best AI coding agents in 2026, compared.