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Coding interview assistant — a real teammate, not guessing AI

Every other coding interview assistant is an AI copilot that guesses. Codex is different: a trusted teammate joins your shared pad and feeds you correct, real-time help while you interview.

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Your Coding Pad

Coding interview assistant real-time collaboration pad

Shared With Your Teammate

A trusted teammate helping live in a Codex coding interview

Trusted by 437+ devs hired at top companies

Why AI interview assistants let you down

An AI coding interview assistant writes an answer from a language model, so it sounds certain even when it's wrong. The moment the problem drifts from a textbook pattern, it hallucinates — and when the interviewer asks you to walk through your reasoning, there's no model that can join that conversation for you.

“Undetectable” is a moving target, too. Every platform update chips away at the invisible-overlay tricks these tools sell. We wrote the full argument for the human alternative in why AI interview tools fail.

What is a coding interview assistant?

A coding interview assistant is a tool that helps you solve problems during a technical interview. Most are AI copilots that generate answers automatically. Codex Interview is the human alternative: you share a live coding pad with someone you trust, and they guide you through each question in real time — with correct answers, not AI guesswork.

How Codex works

1
Install the desktop app
Download Codex for Mac or Windows and open it beside your interview call — see the installation guide to get set up in minutes.
2
Invite a trusted teammate
Share a link so a friend or mentor joins your pad from any browser. No account required to help.
3
Share your screen and get live help
Every keystroke and message syncs instantly, so your teammate feeds you correct answers while you drive the interview.
Read the installation guide

Human teammate vs. undetectable AI

A coding interview copilot only helps if it's right when it counts. Here's how a real teammate compares to an AI overlay — or see the full Codex vs AI interview copilots breakdown.

Codex (human)AI copilots
Answer accuracyA real engineer verifies the solution before you type a lineConfidently wrong the moment the problem isn't textbook
Interviewer follow-upsAdapts live as the interviewer probes your reasoningCan't follow the conversation happening in your room
Hints & partial creditNudges you toward the answer so it stays your workDumps a full solution with no read on the moment
You actually learnPair with a mentor and keep the skill afterwardCopy, paste, forget
Works over screen shareRuns beside Zoom, Meet, Teams, CoderPad & moreFragile 'invisible' overlays that break on updates
Price$29 one-time Day Pass — no subscription$39–$299/mo, billed monthly

Competitor pricing reflects publicly listed AI interview copilot plans as of July 2026 and can change at any time.

What you get

Real-time collaboration

Every keystroke, cursor, and message syncs instantly between you and your teammate.

Multi-language execution

Run JavaScript, Python, Java, C++, and Go right inside the pad — no separate compiler.

Session playback

Replay a past session's code and chat to review what worked and prep for next time.

Native desktop app

A dedicated Mac and Windows app that sits quietly beside your interview call.

Control everything hands-free from the command palette — hide, move, or refresh the window without touching your mouse.

Which platforms does Codex Interview support?

Codex Interview runs as a separate desktop app alongside your call, so it works reliably across these browser-based meeting platforms. Below is an up-to-date list of platforms where Codex Interview performs reliably. We recommend running through our basic checks before your actual interview to make sure everything works.

Codex Interview works with Zoom. Make sure you've completed our screen sharing setup so your pad stays visible on the call.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.
Heads up! The latest Chime desktop app isn't playing nice with our tool right now. Your best bet is to ask your interviewer for a browser link instead - that way you'll get the full experience. If you have to use the desktop app, we can't guarantee everything will work as expected.
We've thoroughly tested this and can confirm it works perfectly as long as you pass these basic checks first. Curious how the collaboration works under the hood? Check out our behind-the-scenes explanation - we've laid out everything in detail.

Find a plan

One-time passes · No subscription · No auto-renewal

Free

Unlimited local pads

  • Unlimited coding pads
  • Multi-language syntax highlighting
  • Code execution
$0
free forever
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Day Pass

24-hour session pass

  • Real-time collaboration
  • Everything in Free
  • Live help from a trusted teammate
  • Screen sharing
  • History and persistence
  • 24/7 customer support
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$29
one-time · 24-hour access
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Codex Enterprise

For large teams

Boost productivity with our Business and Enterprise⁠ plans.
Unlimited pads and fully access to your database, workspace and infrastructure.
Enterprise-grade security, admin controls, SAML SSO, and compliance with GDPR and CCPA.
Chat with Bigocodes

No $39–$299 every month. No recurring subscription at all.
Pay $29 once, only on the day you actually need a teammate.

Who it's for

  • Engineers interviewing at FAANG and other top companies
  • Candidates in live, remote coding screens over screen share
  • Anyone running mock interviews with a friend or mentor
  • Devs pairing on take-home problems and data-structure drills

Curious why people move off AI tools? See why developers are switching, or read how Codex Interview works.

Frequently asked questions

Everything you need to know about using a human coding interview assistant.

Yes. Codex Interview is a coding interview assistant powered by a real teammate instead of AI. You share your coding pad with someone you trust and they help you work through each problem live — correct answers, real reasoning, no guesswork.
AI copilots generate answers from a language model, so they hallucinate on anything non-standard and can't follow the conversation in your interview. Codex connects you to a real engineer who sees the same pad and adapts to every follow-up in real time.
Speed only helps if the answer is right. AI copilots stumble on unusual prompts and can't explain their reasoning when the interviewer digs in. A human teammate gives you a correct approach and helps you defend it out loud.
Codex runs as a separate desktop app beside your call, so it works with Zoom, Google Meet, Microsoft Teams, CoderPad, HackerRank, and CodeSignal. Run our basic checks first so everything is ready before your interview.
Codex is free to download and use for unlimited local pads. When you need real-time help from a teammate, a one-time Day Pass is $29 for 24 hours — no subscription and no auto-renewal.
Absolutely. Invite a friend or mentor into your pad to run mock interviews, pair on problems, or review a past session with playback. Many people use Codex purely to practice before the real thing.
You install the Codex desktop app on Mac or Windows; whoever helps you can join from any browser with no account required. Setup takes a couple of minutes — see the installation guide.
The $29 Day Pass is a one-time charge with no subscription or auto-renewal. If something goes wrong with your session, contact support and we'll help — full terms are on our refund policy page.
As soon as you send the invite link, whoever you're inviting can join from any browser. How fast that happens depends on who you ask — Codex doesn't provide the teammate for you, so line up a trusted friend, mentor, or colleague and make sure they're available before your interview starts.
Your coding pad is only shared with the people you invite — nobody else can join or view your session. Session playback lets you replay a room's code and chat afterward so you can review it whenever you need to.
You can run JavaScript, Python, Java, C++, and Go directly inside the pad, with no separate compiler or setup needed.
Codex Interview logo

Bring a real teammate to your next interview.

Download Codex Interview and start free today.

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