Same essay · same prompt to every AI · very different bands
Ask a free tool, and a real 4.0 student hears 1.5–3.0 — Gemini says 2.0. We say 4.5: half a band, the only reading anywhere near the truth.
A 5.5 answer, read 4.5–5.0 by most chatbots. We read it exactly: 5.5.
Believe the chatbots and you’d think you’re a 4.5 student — this answer was a 6.0 all along.
A Band-7 essay, told it’s 5.5 — that’s paying for another course you never needed.
Our one miss on this page: half a band. We print it — you see everything, so you can trust everything.
Nobody’s AI gives IDP’s own perfect answer its 9 — half call it 5.5–6.5. The closest reading on the page: ours, 8.0.
You paste your essay into ChatGPT. It calls a real 7.0 essay a 6.0 — we checked, on examiner-scored answers. We grade on the official criteria and show exactly where the band went — in Vietnamese. Here’s the receipt.
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Don’t take our word for it — Cambridge 19 is in every bookstore, examiner scores printed inside. Check the answers yourself, or read the full methodology →
Across all nine examiner-scored answers — our average miss: 0.22 of a band. Gemini 0.72 · ChatGPT 0.94 · DeepSeek 0.94 · Claude 1.50. Nine of nine we landed within half a band, with zero bias either way — every chatbot reads low.
Published, examiner-scored Cambridge 19 answers plus IDP’s published Band 9 sample — you can look every one of them up. Every system, ours included, graded every answer three times with the identical prompt on 9 Aug 2026; every number shown is that system’s median. Model versions and per-answer raw numbers are on the accuracy page. We’re closest, not perfect: our average miss is 0.22 of a band, we missed the 8.0 answer by half a band while Gemini hit it — and we print both.
Average miss vs the examiner’s band — smaller is better.
Worst single miss: IELTS Ace 0.5 · ChatGPT 1.0 · DeepSeek 1.5 · Gemini 2.0 · Claude 2.5 bands.
“Overall the essay fits the band 7 description. Good range of complex sentences. To improve, use more advanced vocabulary and check your grammar carefully.”
✗ which sentence lost the band — not shown✗ your words, marked — no✗ a corrected rewrite — no
See this full report →“Overall, the speech fits well within the band 7 description due to its smooth flow, despite the slow pace and lack of cohesive devices affecting clarity.”
✗ which word was mispronounced — not marked✗ where you hesitated, on your transcript — not shown✗ a model answer — no
See this full report →
See this full report →
See this full report →
Liz evaluates, teaches, and practices with you. One voice across writing, speaking, and your daily study plan.
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Any Task 1 or Task 2 prompt, any speaking part. No account needed for your first check.
Independent observers count your errors, devices and evidence; the official band descriptors turn the counts into a band. No single AI’s opinion.
Your band with every criterion, the exact sentences that cost you, and the fastest path up — explained in Vietnamese.
Writing and Speaking scored on the official criteria — plus Reading and Listening feedback that shows the exact sentence that proves each answer. Nobody else does that part.
Your goal band, exam date and weak areas, referenced in every lesson. Text chat or live voice conversation.
Timed, band-weighted, all four skills — with a calibrated study plan after each one.
Every explanation available in Vietnamese — because “improve your cohesion” helps nobody in a language you’re still learning.
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No. It’s a practice estimate. On published examiner-scored answers our average miss is 0.22 of a band — measured, and published on this page — but only IDP and the British Council issue real scores.
Every essay in the comparison is published with its examiner score — Cambridge 19 is in any bookstore. Check the answers yourself, or read the full methodology with raw numbers.
Because it never hears you. Two of the four official criteria — Pronunciation, and the fluency half of Fluency & Coherence — live in the sound: pauses, pace, fillers, hesitation, intonation. A chatbot reads a transcript you typed, and typed transcripts flatter you: the “um”s disappear, autocorrect fixes your grammar, and you write what you meant to say, not what you said. We score the recording itself — word-level pronunciation, timing, fillers — and then apply the official descriptors to what was actually said.
Yes — the scoring reads your English, and every explanation of what to fix is available in Vietnamese.
Anytime, in one click — weekly and monthly plans stop at the end of the paid period. The Exam Pack is a single payment; there’s nothing to cancel.
Two minutes, free, no account. A practice estimate — not an official IELTS score.
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