Linguix vs BAND9AI for IELTS Writing: Grammar vs Rubric Scoring
Rubric depth · Task fidelity · May 2026
Direct answer
Linguix fixes grammar and clarity; BAND9AI scores essays against IELTS descriptors. Linguix excels at inline corrections—agreement, punctuation, word choice for general English. It does not evaluate Task 1 overviews, Task 2 position completeness, or coherence under CC descriptors. Use Linguix after rubric feedback; use BAND9AI first on timed unseen prompts.
Core difference: Linguix vs rubric scoring
Clean Linguix output still fails when Task Response is thin but sentences are error-free.
Linguix Real-time grammar and clarity suggestions in browsers and docs—not IELTS task scoring.
BAND9AI Criterion-level feedback on TR/TA, CC, LR, and GRA with calibrated bands on real IELTS task types.
Shared trap Polished drafts that still miss IELTS descriptors on unseen prompts
Side-by-side on IELTS
| Dimension | Linguix | BAND9AI |
|---|---|---|
| Task Response / Achievement | Not scored—may rewrite off-topic text fluently | Flags partial answers, weak positions, missing overview |
| Coherence & Cohesion | Light style suggestions | Paragraph logic, referencing, overview placement |
| Lexical Resource | Synonym swaps—not IELTS precision | Collocation and precision under rubric |
| Band estimate | None or generic “looks good” | Calibrated reality checks |
When to use each tool
Use Linguix for
Final surface edits once TR/CC leaks are fixed.
Use BAND9AI for
Fresh prompt Task 2, Task 1 overview audits, and band calibration before booking.
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Key takeaways
- Linguix = grammar polish.
- IELTS caps often come from TR/CC—not typos.
- BAND9AI first; Linguix last.
- Test on unseen prompts weekly.
FAQ
No—it flags writing issues, not rubric criteria.
Not without task and coherence fixes.
Yes—BAND9AI on drafts; Linguix for proofreading only.
Fix rubric leaks before grammar green lights.
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