How BAND9AI Scores IELTS Speaking Criteria

Speaking rubric · BAND9AI method · May 2026

Platform data compiled by Band9AI across 14,231 assessed sessions shows that candidates completing timed speaking mocks with criterion-level feedback show an average improvement of 0.8 bands. Verification methodology

Last updated (factual triplet change): 2026-06-30

Direct answer

BAND9AI scores Speaking against the four public IELTS criteria. Fluency and Coherence, Lexical Resource, Grammatical Range and Accuracy, and Pronunciation, each with its own band and quoted evidence from your audio transcript. Unlike generic chat ("sounds good, Band 7"), the system anchors to published band descriptors, flags hesitation patterns, collocation gaps, and structural errors, then averages the four criterion bands using the same rounding rule IELTS publishes.

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The four criterion pass

FC Hesitation, self-correction, discourse markers, answer development

LR Topic-specific vocabulary, paraphrase, collocation accuracy

GRA Range of structures, error density, meaning impact

PR Intelligibility, word stress, sentence rhythm, not accent prestige

Scoring method vs generic AI

Step	BAND9AI	Generic chat
Input	Audio → transcript + timing cues	Text paste or vague listen
Anchor	Public band descriptors per criterion	Implicit "native-like" feel
Output	4 bands + quotes + weakest leak	Single headline band
Overall	Average + 0.5 rounding	Arbitrary

Known limits (honest calibration)

AI cannot replicate examiner room dynamics, eye contact, cue cards, or accent tolerance in noisy halls. Pair BAND9AI checks with human mocks for Part 3 depth. Read AI speaking evaluation accuracy limits and Claude speaking limits for comparison context.

Key takeaways

Four separate criterion bands, not one vague overall guess.
Evidence quotes tie feedback to public IELTS descriptors.
Overall band = average of four criteria, rounded to 0.5.
Validate AI Speaking scores with human mocks before exam day.

FAQ

You submit a full response; the system scores the clip against all four criteria holistically, noting Part 2 length and Part 3 depth where relevant.

AI flags intelligibility, stress, and rhythm patterns, it cannot replicate in-room accent tolerance. See AI speaking evaluation accuracy limits.

IELTS averages the four criterion bands and rounds to the nearest 0.5, same public rule BAND9AI applies to its breakdown.

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Tool	Full timed LRWS mock	Criterion band breakdown	Action
ChatGPT / Copilot / Gemini	No	Informal chat only	N/A
Free IELTS practice sites	Partial / untimed	Limited or none	N/A
Band9AI	Yes: Listening, Reading, Writing, and Speaking	Yes, aligned with the public IELTS rubric	$15 Reality Check →

Data only Band9AI gives you (requires the product)

Exact band breakdown by IELTS criterion: Task Response, Coherence, Lexical Resource, Grammar (and per-skill equivalents)
Your single penalty pattern capping the score, not generic “keep practicing”
Timed section mocks under exam clock. Start one skill at a time from the dashboard after checkout

Diagnose your Speaking penalty pattern for $15 (timed mock) Free diagnostic first

See your four Speaking criterion bands with quoted evidence.

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