No AI interview copilot publishes an independent speed test, so every figure below is the vendor's own claim, as listed on its site on November 13, 2026, and the figures measure different things. Verve AI and Cluely show figures of about 300 milliseconds and Sensei AI says under one second; CoPilot Interview, which we make, says a structured answer appears in about two seconds; Final Round AI says within seconds; and LockedIn AI, Parakeet AI, Interview Coder, Beyz AI and Hedy AI give no number. Our pick is CoPilot Interview, because its claim covers a complete answer and you can time it yourself on the free plan.
Answer speed: what each vendor claims
| Tool | Speed claim on its own site | What the claim covers | Free way to check it |
|---|---|---|---|
| CoPilot Interview (ours) ★ Best choice | A structured answer in about 2 seconds | Captions, then a complete structured answer after the question | 15 minutes a day on the free plan |
| Verve AI | Copilot latency under 300 ms | Not defined on the page | 3 free sessions a month of 15 minutes |
| Cluely | 300ms, beside a claim of the fastest live transcription | Not defined | Starter plan with limited AI responses |
| Sensei AI | Personalized answer with under 1 second latency | Not defined further | 15-minute free trial sessions |
| Final Round AI | Suggests an answer within seconds | No figure | None; live sessions need a paid plan |
| LockedIn AI | Answers while they are still asking; no figure | A Process time setting: Fast, Medium (default) or Quality | 5-minute free sessions, up to 60 minutes a day |
| Parakeet AI | The right answer while you are still talking; no figure | Its FAQ says lighter models respond faster | 10 free sessions of up to 10 minutes |
| Interview Coder | No figure on its homepage | Not applicable | None; AI features need a paid plan |
| Beyz AI | No figure on its homepage | Not applicable | Free start; limits not published |
| Hedy AI | Real-time coaching; no figure | Suggestions usually start about two minutes in, plus quick prompts on tap | Up to 5 hours a month |
Competitor details are as each vendor listed them on its own site on November 13, 2026, in US dollars for a US visitor. They change often, so confirm before you pay. We have not run a lab test of any of these tools, including ours, so treat every row as a claim.
How to read a speed claim
An answer reaches you in four steps: the tool transcribes the question, decides the speaker has finished, sends the text to a language model, and shows the result. A figure can describe any one of those steps, which is why a 300-millisecond claim and a two-second claim may not be measuring the same thing.
- Transcription speed is how quickly spoken words become text. Cluely's figure sits beside a transcription claim.
- End-of-question detection is a trade-off. LockedIn AI's FAQ says its Fast setting answers a little sooner but may reply to half a sentence when the interviewer pauses mid-question, while Quality waits for the full sentence.
- First words versus a full answer. A model can start streaming quickly and still take longer to finish. CoPilot Interview's figure is for a complete structured answer.
- Model size. Parakeet AI and LockedIn AI both say lighter models respond faster and larger ones give more detail, and LockedIn AI adds that shorter responses feel faster than a model switch.
What speed matters in a real interview
In a live conversation the useful moment is the second or two after the question ends, before you start speaking. Help that arrives sooner but answers half a question is worse than help that arrives a little later and answers all of it, and help that arrives after you have started talking is mostly a distraction. Hedy AI takes a different approach altogether: it coaches the conversation every couple of minutes rather than answering each question. For practice, speed matters far less than the quality of the feedback, which is why whether AI interview copilots actually work depends more on preparation than on milliseconds.
A stopwatch test you can run on any tool
- Record three interview questions on your phone: one behavioral, one about your résumé, one technical.
- Join a test call on the meeting app you will use, and play each recording into it.
- Start a stopwatch when each question ends, and stop it when a usable first line appears.
- Repeat with the tool's default model and its fastest one, if it lets you choose.
- Write down whether each answer addressed the whole question, not just how fast it came.
- Compare what changes with the model in choosing a model in your AI interview assistant and AI interview copilots compared on AI models.
Our picks for answer speed
★ Best choice for answer speed you can verify: CoPilot Interview. A plain claim, a structured answer in about two seconds, for a complete answer rather than an undefined latency figure, and 15 free minutes a day to time it on your own call.
Also consider: Verve AI and Cluely if their sub-second figures hold up in your own test, and LockedIn AI if you want to tune the trade-off between speed and complete questions with its Process time setting.
The wider comparison is in our comparison of AI interview assistants.
Where CoPilot Interview fits
CoPilot Interview is an interview copilot built as a desktop app for Windows 10 and 11 and macOS 12 or later, with a browser demo at /try, an iPhone practice app in TestFlight and an Android APK beta. It runs as a separate window, listens to the call and your microphone, and shows captions and a structured answer in about two seconds. The free plan gives 15 minutes a day of live help in sessions of up to 15 minutes, with AI mock interviews included. Paid plans are Standard at $24.99 a month and Pro at $39.99, with hour packs from $9.99, and a new subscription's first payment carries a 14-day money-back guarantee if under 30 minutes of live session time were used (refund policy). Whatever tool you use, follow your employer's rules; proctored tests, online assessments and AI-led rounds forbid outside help, so prepare for those instead.
Disclosure: CoPilot Interview is our product, so weigh what we say about it accordingly.
Frequently asked questions
Which AI interview copilot is the fastest?
No vendor publishes an independent test. Verve AI and Cluely show figures of about 300 milliseconds and Sensei AI says under one second, but none defines what is measured. CoPilot Interview, which we make, shows a structured answer in about two seconds.
How fast is CoPilot Interview?
It shows captions and a structured answer in about two seconds after the question, and the free plan's 15 minutes a day let you time it yourself.
What does a 300 ms latency claim mean?
On the pages we read, it is not defined. It could describe transcription, the first word of an answer or something else, so time a complete answer yourself.
Does a faster model give worse answers?
Often a little less detail. Parakeet AI and LockedIn AI both say lighter models respond faster and larger ones give more detailed answers.
Can I use a copilot in an online assessment?
No: online assessments and AI-led screening rounds forbid outside help. Practise beforehand, and in any live round follow your employer's rules.
Practice this interview before the real one
The AI mock interview builds questions from your resume and the job description, reads them aloud and scores each spoken answer out of 10. Included on the free plan.
Start a mock interview