Codex
OpenAI · US
Official siteGeneration speed does not show whether code fits a project. A useful trial takes one bounded task in a real repository, with tests, review and a way to undo changes.

Explain an area of code before proposing an edit.
Fix a reproducible defect and verify the affected behaviour.
Build a limited prototype, then inspect its dependencies.
Compare the proposal with existing conventions and dependencies.
Run meaningful tests and review the diff line by line.
Check permissions, repository access and data handling.
These active services are starting points from the directory. Editorial highlighting and score order this selection; they do not replace a trial on your own task.
OpenAI · US
Official siteAnthropic · US
Official siteOpenAI · US
Official siteJetBrains
Official siteGoogle · US
Official siteWarp · US
Official siteAmazon Web Services · US
Official siteCline
Official siteWindsurf · US
Official site