What is Clastify?
Clastify is known for IB example work and paid examiner-style reviews of IA, EE, and TOK submissions.
Clastify
ChatGPTClastify vs ChatGPT
Source freshness: dated public claims, last updated .
- Clastify review page
- Clastify review pricing bundle (page script)
- ChatGPT pricing page
- OpenAI ChatGPT Study Mode update
Do you want to know wether Clastify or ChatGPT is best for IB? This page provides a through comparison of both tools.
TL;DR
Last updated:
- •TL;DR: In Clastify vs ChatGPT, Marksy is included as a third option and usually does best for checking several IB drafts.
- •Clastify and ChatGPT each have strengths, but Marksy is generally the best alternative if your priority is getting IB-ready grading output fast.
- •Free plan with 5 full gradings/month, then clear paid tiers at 50/200 gradings.
- •Grade IA, EE, and TOK drafts, practise orals, and check sources from the same account.
- •Fast feedback and optional batch uploads make it easier to check more than one draft.
What is ChatGPT?
ChatGPT is a general-purpose AI assistant used for writing and study support across many domains, including IB tasks when configured with user prompts.
Features comparison
| Feature |  Clastify |  ChatGPT | |
|---|---|---|---|
| General | |||
IB oriented ?IB-specific tools need less setup than a blank chat box. | Strong?Made specifically for grading and improving IB work. | Strong?Strong IB exam/examiner framing in public messaging. | ×No?General assistant, not IB-specific by default. |
Affordable ?Shows what users actually pay, including per-review and billed-total caveats. | Strong?$0 entry with 5 full gradings/month, then paid student plans from $14.99/month. | ~Partial?Base access can start around $12.99/month, with per-submission review pricing (TOK $44.99, IA $49.99, EE $59.99). | ~Partial?Free tier is available, with paid plans publicly listed around Plus ($20/month) and Pro ($200/month). |
Has free tier ?Students can start immediately without procurement or upfront payment. | Strong?5 complete gradings monthly on free access. | ~Partial?Has free tier but very limited. | Strong?Public free plan exists with paid upgrades for higher limits and models. |
Transparent pricing ?Lower uncertainty at evaluation time. | Strong?Public monthly pricing with free, student, and teacher tiers. | Strong?Public review pricing is visible for IA/EE/TOK review offerings. | Strong?Public plan structure (Free/Plus/Pro/Business/Enterprise) is listed. |
| Coursework grading | |||
IA / EE / TOK grading support ?Made for IAs, Extended Essays, TOK, and other IB coursework. | Strong?Grades IA, EE, and TOK drafts. | Strong?Public review options include IA, EE, and TOK review tracks. | ~Partial?Can discuss many task types, but each one needs the right prompt. |
Marks by criterion ?Criterion-by-criterion marks and feedback, not generic advice. | Strong?Shows estimated marks and feedback for each assessment criterion. | Strong?Review service provides predicted scores and criterion-linked improvement guidance. | ~Partial?Can grade with prompts, but IB rubric fidelity depends on user setup. |
AI detection ?Integrity checks are native, not a separate purchase. | Strong?20-50 paid-tier AI checks monthly. | ×No?No built-in AI-detection check is advertised. | ×No?No first-party academic AI-detection checker in ChatGPT product flows. |
Specific tips ?A clear list shows students what to fix first. | Strong?Pairs comments with a short list of changes to make next. | ×No?Specific comments come mainly through each paid review. | ×No?Students must prompt it to return a useful list of specific fixes. |
Quick ?Fast feedback leaves time to edit and check another version. | Strong?Fast feedback leaves time to edit and check another version. | ×No?Human examiner review can take longer than instant AI-first loops. | Strong?Most text responses appear immediately. |
Human review ?Human review can help edge cases but usually adds time and cost. | ×No?Uses AI feedback rather than a human examiner review. | Strong?Core value prop: real examiner review plus exemplars. | ×No?Not an examiner review marketplace. |
Good price for grading drafts ?The cost of checking several drafts matters more than one review. | Strong?Subscription pricing keeps repeated retries cheaper than per-review models. | ×No?Per-submission review pricing can become expensive for frequent weekly draft cycles. | ×No?The subscription is not priced specifically for grading coursework. |
| Textbooks and simulations | |||
Online textbooks ?Useful for understanding a topic before working on coursework. | Strong?Includes online textbook chapters as well as draft grading. | ×No?No online textbook product is offered. | ×No?No official IB textbook or revision library bundled by default. |
Hundreds of simulations to learn concepts ?Interactive simulation depth improves understanding before drafting. | Strong?Public simulations hub includes hundreds of IB learning simulations. | ×No?No public simulations library is positioned. | ×No?No built-in simulation library for IB concept learning. |
Available for free ?Free learning content removes friction for everyday revision. | Strong?Core simulation and revision resources are publicly accessible. | ~Partial?Some resources are accessible with free accounts; detailed reviews are paid. | ×No?Study support is chat-based, not free textbook content delivery. |
| Oral practice | |||
Practice and get feedback ?Oral practice should include structured scoring feedback. | Strong?Built-in oral practice returns feedback after each attempt. | ×No?Not marketed as an oral/IO practice system. | ~Partial?Can simulate an oral, but the student must set up the IB format in the prompt. |
Affordable oral practice ?Predictable oral-practice costs matter when students rehearse frequently. | Strong?Oral practice is included in plan limits, not charged per attempt. | ×No?No oral practice feature is advertised. | ×No?Oral practice is possible, but no ready-made IB oral setup is included. |
| Questionbank | |||
Practice IB questions ?Question practice is valuable when linked to criterion-aware feedback. | ×No?No first-party questionbank is publicly offered by Marksy. | ×No?No dedicated IB question-practice bank is provided. | ×No?No official IB questionbank library bundled by default. |
| Teacher features | |||
Grade assessments in large batches ?Batch grading throughput matters for teacher workloads. | Strong?Bulk grading supports up to 15 submissions at once. | ×No?Reviews are bought one submission at a time. | ×No?Public product is not a batch grading pipeline. |
Export grading results in bulk ?Exportable outputs simplify moderation and record-keeping. | Strong?Feedback outputs can be reused and shared for iteration. | ~Partial?Delivers detailed output per submission, but no public bulk export flow. | ×No?No structured bulk export of grading results by default. |
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Frequently Asked Questions
What makes Marksy different from Clastify or ChatGPT?
Marksy is made for checking several IB drafts and is rated strong for grading value, compared with no for Clastify and no for ChatGPT. Current public prices: Marksy — $0 entry with 5 full gradings/month, then paid student plans from $14.99/month. Clastify — Base access can start around $12.99/month, with per-submission review pricing (TOK $44.99, IA $49.99, EE $59.99). ChatGPT — Free tier is available, with paid plans publicly listed around Plus ($20/month) and Pro ($200/month). Marksy leads 13 rows against Clastify, especially Specific tips and Good price for grading drafts, and 14 rows against ChatGPT, especially IB oriented and Specific tips.
Can Marksy grade full coursework drafts?
Yes. Marksy accepts full coursework submissions for supported assignments and returns a predicted mark, comments, highlights, and a list of fixes.
What happens if Marksy cannot read my file?
Marksy checks whether the file and grading result can be read. If a check fails, it can retry safely instead of showing a broken report.
Can teachers grade several files at once?
Yes. The highest plan can grade up to 15 files in one batch and export the results.
What are Marksy usage limits for Free/Student/Teacher tiers?
Current monthly grading limits are 5 on Free, 50 on Student, and 200 on Student Plus. Oral practice and AI checks have their own monthly limits.
Is student data private and can users delete data?
Marksy uses account-scoped access controls and user data-management paths. From a product-fit perspective, this page's matrix also shows Clastify vs ChatGPT at 6-3, while Marksy still leads as the practical grading-first alternative.