I ve spent two years building AI scoring for IELTS, and I still don t have a clean answer to this.
Here s where I ve landed so far. Some parts of the rubric are mechanical and a model handles them well: word count, task coverage, paragraph structure, grammatical range, whether the response actually answers the prompt. Reading and Listening are trivially checkable there s a key.
A complete IELTS practice platform, not a single-feature tool. All four sections: timed Reading and Listening with per-question explanations, Writing scored across the four official criteria with sentence-level rewrites, and Speaking assessed from your recorded answers on fluency, pronunciation, and lexical range. Built on 1,200+ essays graded through its predecessor bot. Free tier, no card required
