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IELTSWriting.ai — Professional IELTS Writing Band Prediction

A specialised scoring engine for IELTS Writing, validated with thousands of real exam scripts and official band scores.

Unlike generic AI chatbots, IELTSWriting.ai is built as an assessment system: it predicts your IELTS Writing band, explains the result using official criteria, and points to specific changes that can lift your score.

Key Validation Metrics

The scoring engine has been benchmarked against real IELTS Writing scores at scale. The main outcomes are:

3,451
Real Scripts

Real IELTS Writing scripts paired with official band scores used for calibration and validation.

73.2%
Exact Band Match

In nearly three out of four cases, the predicted band equals the official IELTS Writing band.

98.7%
Within ±0.5 Band

For almost all essays, the prediction is within half a band of the official score.

1.22%
≥ 1.0 Band Difference

Large discrepancies are rare, making the system suitable for planning and progress tracking.

Validation covers a broad range of topics, task types, and proficiency levels.

Why You Can Trust the Score

IELTSWriting.ai is built to behave like a scoring system, not a chatbot. The model is aligned with official IELTS Writing band descriptors and scoring criteria.

The engine evaluates writing against the four official criteria — Task Achievement, Coherence & Cohesion, Lexical Resource, and Grammatical Range & Accuracy — using fine-grained linguistic and structural features.

Because the model is calibrated on real exam outcomes, its scoring patterns reflect how human examiners distinguish between band levels.

How the Model Was Validated

The process follows standard assessment practice: collect real data, clean it, align it with the target population, and then measure accuracy and stability.

  1. 1

    Paired Data Collection

    IELTS Writing scripts are gathered together with their official band scores, covering a range of topics and band levels.

  2. 2

    Data Cleaning and Filtering

    Incomplete responses, off-topic essays, and implausible score pairs are removed so the dataset reflects genuine exam performance.

  3. 3

    Band Distribution Alignment

    The sample is adjusted so its band distribution resembles that of typical IELTS candidates, avoiding bias toward a single proficiency range.

  4. 4

    Training and Calibration

    The model is trained on features closely linked to the official criteria, then calibrated so predicted bands align with observed human scoring patterns.

  5. 5

    Error and Stability Analysis

    The team evaluates how often the system matches the official band, how large differences are when they occur, and how consistent scores remain under different conditions.

  6. 6

    Ongoing Monitoring

    The system is periodically tested on new essays to confirm that its behavior remains stable over time.

What You Get from Each Evaluation

An Exam-Aligned Band Score

A predicted band for Task 1, Task 2, and overall Writing, intended to reflect real exam scoring behavior, plus an indication of the confidence or expected range.

Breakdown by Official Criteria

Scores and short explanations for Task Achievement, Coherence & Cohesion, Lexical Resource, and Grammar, using language consistent with IELTS band descriptors.

Concrete Revision Guidance

Specific suggestions at sentence and paragraph level, including examples of stronger phrases or structures, so you know what to change to move toward your target band.

Why Not Rely on a General Chatbot?

Generic AI tools are great for brainstorming or grammar checks, but they are not designed to support score-based decisions. IELTSWriting.ai focuses on one task: providing an exam-aligned view of IELTS Writing performance.

AspectGeneral AI ChatbotsIELTSWriting.ai
Primary purpose✕General conversation and content generation✓IELTS Writing assessment and training
Band calibration✕No calibration to IELTS bands✓Calibrated to official IELTS Writing bands using real exam scripts
Score consistency✕Band estimates can vary noticeably between sessions✓Designed for stable behavior across repeated scoring
Feedback style✕Broad language advice, not tied to band descriptors✓Directly linked to official criteria and band levels
Use for planning test dates and targets✕Not recommended for high-stakes decisions✓Built specifically to support planning and progress tracking

Check Your IELTS Writing Level Before Test Day

Upload a recent essay, select Task 1 or Task 2, and receive an exam-aligned evaluation in seconds. The report helps you decide whether you are ready to book the exam, how far you are from your target band, and which areas to prioritise next.