AI coding interview

An AI coding interview that runs your code and asks why

Solve a real interview problem out loud while a voice AI interviewer listens. Your code is compiled and run against the problem's hidden test cases in 6 languages, the interviewer sees what passed and what failed, and then it asks the follow-ups a senior engineer would: complexity, edge cases and the faster approach. Most AI interview tools only grade what you say. This one grades what your code does.

Start a free mock interview See Pro plans

How a session works

Step 1
Pick the problem
One of 410 DSA problems, a pattern, a company's question set, or a random problem at your level.
Step 2
Clarify and plan
Ask about input size and constraints, then explain your approach before you type, as you would in the real round.
Step 3
Code and run
Write the solution in the browser editor in Python, C++, Java, JavaScript, Go and C#. Each run executes against real test cases, and the interviewer sees the result.
Step 4
Defend it
Answer follow-ups on complexity, failing inputs and trade-offs, then read a scored report a minute after you finish.

What the AI coding interviewer does

It runs your code, not just reads it

Every submission is compiled and executed against the problem's stored test cases in 6 languages: Python, C++, Java, JavaScript, Go and C#. If an edge case fails, the interviewer knows, and it asks you to find the bug the way an interviewer at a real coding round would. 81,000+ code submissions have run on the platform.

It asks the follow-up instead of moving on

A complexity claim with no justification, a missing empty-input check or an unexplained data structure gets a follow-up question. You practise the part of the coding interview that a LeetCode submission never tests: explaining and defending the solution under time pressure.

Problems organised by pattern and company

The 410 DSA problems are grouped into 99 patterns in 16 families, so you can drill sliding window or graphs until they stick. You can also scope a round to one of 160 companies with interview data behind them.

Real timing and a real report

Problem rounds run for 30 minutes, the length of a typical phone screen. The report scores understanding the problem, approach and optimisation, code quality, verification and communication separately, quotes your own words as evidence, and names the one thing to fix before the next round.

Learn the patterns between interviews

Coding interviews reward pattern recognition. The same account that runs your mock interviews gives you structured learning paths and the standard problem lists, each problem one click from an AI interview on it.

DSA patterns learning path
99 patterns in 16 families, with lessons, animations and practice problems.
NeetCode 150 sheet
The NeetCode 150 list, grouped by pattern, with an AI interview button on every problem.
Blind 75 sheet
The classic 75-problem list for a short runway before a coding interview.
Company-wise interview kits
Interview data from 160 companies, so you can practise the problems your target company asks.

How it scores you

Scored against a written coding-round rubric, dimension by dimension: understanding the problem, approach and optimisation, code quality, verification and communication.
Whether your code passed the test cases is evidence in the report, not a guess from your explanation.
Hints you ask for count against the score, so a hinted solution does not score like an independent one.
Starter shows the overall score, a summary, strengths and areas to improve. Pro adds per-question reviews with a stronger answer, your top priorities and a practice plan.

What it costs, next to the alternatives

Option	Price (USD)	What you get
Thita Starter	$0	2 AI interviews in your first week, then 1 a month. No card needed.
Thita Pro	$14.99/month or $75/year	15 AI interviews a month (about $1 an interview), AI code feedback, company kits and both 90-day roadmaps.
Thita Elite	$29.99/month or $120/year	30 AI interviews a month and all 11 learning paths.
interviewing.io human mock	From $179 per session^[source]	One anonymous mock interview with a senior engineer.

One human mock costs more than two years of Thita Pro. Use AI coding interviews for the volume of practice, and book a human session for a final calibration if you want one.

Questions, answered

What is an AI coding interview?: A practice coding interview in which an AI plays the interviewer. On Thita it is a spoken, timed session: the interviewer presents a problem, listens to your approach, runs the code you write against real test cases in 6 languages and asks follow-up questions about complexity, edge cases and trade-offs.
Does the AI interviewer actually run my code?: Yes. Every submission is compiled and executed against the problem's test cases in Python, C++, Java, JavaScript, Go and C#, and the interviewer sees which cases passed and failed before asking its next question.
Which languages can I code in?: Python, C++, Java, JavaScript, Go and C#. You choose the language when the round starts, and the problem's test harness runs in that language.
Is there a free AI coding interview?: Yes. The free Starter plan includes 2 AI interviews in your first 7 days, then 1 a month. You can also take a 3-question mock without creating an account: one coding problem whose code is actually run, one behavioural question and one system design question.
How long is an AI coding interview?: A single-problem coding round runs for 30 minutes, the length of a typical phone screen. Company, role and resume rounds run for 45.
Can I practise a specific company’s coding interview?: Yes. Scope a round to a company and the interviewer draws on that company's interview context; 160 companies have interview data behind them.
Is an AI coding interview as good as a human mock?: They do different jobs. An AI interviewer is available whenever you are and never skips a follow-up, so it is the affordable way to do many repetitions. A paid session with a senior engineer is better for a final calibration against one company’s bar. Many candidates do AI rounds for volume and one human session in the last week.

Do one coding round today

Thirty minutes, one problem, out loud, with your code actually run. Then read what the interviewer noticed.

Start a free mock interview See Pro plans

An AI coding interview that runs your code and asks why

How a session works

Step 1

Pick the problem

One of 410 DSA problems, a pattern, a company's question set, or a random problem at your level.

Step 2

Clarify and plan

Ask about input size and constraints, then explain your approach before you type, as you would in the real round.

Step 3

Code and run

Write the solution in the browser editor in Python, C++, Java, JavaScript, Go and C#. Each run executes against real test cases, and the interviewer sees the result.

Step 4

Defend it

Answer follow-ups on complexity, failing inputs and trade-offs, then read a scored report a minute after you finish.

What the AI coding interviewer does

It runs your code, not just reads it

It asks the follow-up instead of moving on

Problems organised by pattern and company

Real timing and a real report

Learn the patterns between interviews

DSA patterns learning path

99 patterns in 16 families, with lessons, animations and practice problems.

NeetCode 150 sheet

The NeetCode 150 list, grouped by pattern, with an AI interview button on every problem.

Blind 75 sheet

The classic 75-problem list for a short runway before a coding interview.

Company-wise interview kits

Interview data from 160 companies, so you can practise the problems your target company asks.

How it scores you

Scored against a written coding-round rubric, dimension by dimension: understanding the problem, approach and optimisation, code quality, verification and communication.

Whether your code passed the test cases is evidence in the report, not a guess from your explanation.

Hints you ask for count against the score, so a hinted solution does not score like an independent one.

Starter shows the overall score, a summary, strengths and areas to improve. Pro adds per-question reviews with a stronger answer, your top priorities and a practice plan.

What it costs, next to the alternatives

Option	Price (USD)	What you get
Thita Starter	$0	2 AI interviews in your first week, then 1 a month. No card needed.
Thita Pro	$14.99/month or $75/year	15 AI interviews a month (about $1 an interview), AI code feedback, company kits and both 90-day roadmaps.
Thita Elite	$29.99/month or $120/year	30 AI interviews a month and all 11 learning paths.
interviewing.io human mock	From $179 per session^[source]	One anonymous mock interview with a senior engineer.

One human mock costs more than two years of Thita Pro. Use AI coding interviews for the volume of practice, and book a human session for a final calibration if you want one.

Questions, answered

What is an AI coding interview?

A practice coding interview in which an AI plays the interviewer. On Thita it is a spoken, timed session: the interviewer presents a problem, listens to your approach, runs the code you write against real test cases in 6 languages and asks follow-up questions about complexity, edge cases and trade-offs.

Does the AI interviewer actually run my code?

Yes. Every submission is compiled and executed against the problem's test cases in Python, C++, Java, JavaScript, Go and C#, and the interviewer sees which cases passed and failed before asking its next question.

Which languages can I code in?

Python, C++, Java, JavaScript, Go and C#. You choose the language when the round starts, and the problem's test harness runs in that language.

Is there a free AI coding interview?

Yes. The free Starter plan includes 2 AI interviews in your first 7 days, then 1 a month. You can also take a 3-question mock without creating an account: one coding problem whose code is actually run, one behavioural question and one system design question.

How long is an AI coding interview?

A single-problem coding round runs for 30 minutes, the length of a typical phone screen. Company, role and resume rounds run for 45.

Can I practise a specific company’s coding interview?

Yes. Scope a round to a company and the interviewer draws on that company's interview context; 160 companies have interview data behind them.

Is an AI coding interview as good as a human mock?

They do different jobs. An AI interviewer is available whenever you are and never skips a follow-up, so it is the affordable way to do many repetitions. A paid session with a senior engineer is better for a final calibration against one company’s bar. Many candidates do AI rounds for volume and one human session in the last week.

Practise the coding round, with your code actually run.

What do you want to rehearse?

Interview categories

Data Structures and Algorithms

An AI coding interview that runs your code and asks why

How a session works

Pick the problem

Clarify and plan

Code and run

Defend it

What the AI coding interviewer does

It runs your code, not just reads it

It asks the follow-up instead of moving on

Problems organised by pattern and company

Real timing and a real report

Learn the patterns between interviews

How it scores you

What it costs, next to the alternatives

Questions, answered

Do one coding round today

Practise the coding round, with your code actually run.

What do you want to rehearse?

Interview categories

Data Structures and Algorithms

An AI coding interview that runs your code and asks why

How a session works

Pick the problem

Clarify and plan

Code and run

Defend it

What the AI coding interviewer does

It runs your code, not just reads it

It asks the follow-up instead of moving on

Problems organised by pattern and company

Real timing and a real report

Learn the patterns between interviews

How it scores you

What it costs, next to the alternatives

Questions, answered

Do one coding round today