Begin with one sentence: “I am considering leaving Cursor because…” Then convert it into a trial criterion. For editor lock-in, test Copilot in the exact IDE and remote environment. For terminal control, give Claude Code a repository task that needs commands and Git. For delegation, send Codex independent tasks and measure review capacity. For Google alignment, verify Antigravity access and integration requirements.
Use the same safe task set where possible: trace a defect, implement a small tested change and review an unfamiliar diff. Record setup cost, incorrect file selection, command approvals, quality of explanation, test behavior and usage consumption. Do not use lines generated as a productivity metric. For teams, add security, identity, audit, policy and billing. The winner is the sustainable workflow with acceptable oversight.
Run the trial long enough to encounter routine work, not only a carefully selected demonstration. Include a small change the agent should decline or ask about because requirements are ambiguous. Observe whether it exposes uncertainty, respects repository instructions and keeps unrelated files untouched. Check how easily a reviewer can reconstruct what happened after the session ends. For paid plans, separate completion usage from agent, premium-model or cloud consumption and estimate the cost at team scale. Ask security owners whether prompts, source code, tool output and credentials follow approved data paths. Finally, plan the exit: code, branches and documentation should remain usable if the subscription, allowance or preferred model changes. These operational details often distinguish a tool that looks impressive for an hour from one a team can support for a year.