Compare AI Tools
Claude Duet vs OpenAI Codex
Claude DuetVSOpenAI Codex
Which is right for you in 2026?
1The Verdict
🎯Anthropic's proactive agent app →Claude Duet
🎯OpenAI's coding agent for ChatGPT →OpenAI Codex
2Head to Head
| Claude Duet | OpenAI Codex | |
|---|---|---|
| Best for | Anthropic's proactive agent app: it brings you what needs your attention, keeps working while you step away and checks with you before it acts | OpenAI's coding agent for ChatGPT, your editor and the terminal |
| Runs where | Keeps working when you step away and checks with you before it acts | No data |
| Works from phone | Yes, iOS, Android and claude.ai | No data |
| Price from | Research preview by waitlist (US Pro and Max first) | No data |
3Access
| Claude Duet | OpenAI Codex | |
|---|---|---|
| Availability | Waitlist (research preview) | No data |
| Free plan | No data | No data |
| Platforms | iOS, Android and claude.ai | No data |
| Runs without your device on | No data | No data |
| Active users | Not published | Not published |
4Quick Rule
Want Anthropic's proactive agent app? →Claude Duet
Want OpenAI's coding agent for ChatGPT? →OpenAI Codex
AI tools change fast, sometimes daily. We review and update this comparison regularly. Last reviewed Oct 30, 2026.
Claude Duet Early access
Access: Research preview by waitlist, starting with US Pro and Max subscribers (iOS, Android and claude.ai)
Real Claude Duet Cases
Real OpenAI Codex Cases
OpenAI CodexREVENUEAI WorkflowsACE Studio, Solo AI Studio~$30Kearned
PVPixVerseREVENUEBuild an App with AI$3K First Week, 11th App$3Kearned
OpenAI CodexREACHBuild an App with AIVibe-Coded Photoshop Alternative20KcustomersPrompts to Try
Claude Duet prompt from Describe an automation and let Claude Duet build it with Zapier
Prompt
(Our template, not the creator's prompt.) Act as the operator of a tiny online business: [idea]. List the first 10 tasks, mark which need a human (money, sign-ins, legal), and write a daily log template with revenue, costs and real users.
OpenAI Codex prompt from Run a video studio alone with AI: ACE Studio, 60-80% more income than with seven staff
Prompt
(Our template, not the creator's prompt.) Turn this client brief into a pitch presentation outline: concept in one line, 6 slides with a headline and image prompt each, and a production timeline.
