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.
ChatGPT
ClastifyChatGPT vs Clastify
Source freshness: dated public claims, last updated .
- ChatGPT pricing page
- OpenAI ChatGPT Study Mode update
- Clastify review page
- Clastify review pricing bundle (page script)
Do you want to know wether ChatGPT or Clastify is best for IB? This page provides a through comparison of both tools.
TL;DR
Last updated:
- •TL;DR: In ChatGPT vs Clastify, Marksy is included as a third option and usually does best for checking several IB drafts.
- •ChatGPT and Clastify 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 Clastify?
Clastify is known for IB example work and paid examiner-style reviews of IA, EE, and TOK submissions.
Features comparison
| Feature |  ChatGPT |  Clastify | |
|---|---|---|---|
| General | |||
IB oriented ?IB-specific tools need less setup than a blank chat box. | Strong?Made specifically for grading and improving IB work. | ×No?General assistant, not IB-specific by default. | Strong?Strong IB exam/examiner framing in public messaging. |
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?Free tier is available, with paid plans publicly listed around Plus ($20/month) and Pro ($200/month). | ~Partial?Base access can start around $12.99/month, with per-submission review pricing (TOK $44.99, IA $49.99, EE $59.99). |
Has free tier ?Students can start immediately without procurement or upfront payment. | Strong?5 complete gradings monthly on free access. | Strong?Public free plan exists with paid upgrades for higher limits and models. | ~Partial?Has free tier but very limited. |
Transparent pricing ?Lower uncertainty at evaluation time. | Strong?Public monthly pricing with free, student, and teacher tiers. | Strong?Public plan structure (Free/Plus/Pro/Business/Enterprise) is listed. | Strong?Public review pricing is visible for IA/EE/TOK review offerings. |
| Coursework grading | |||
IA / EE / TOK grading support ?Made for IAs, Extended Essays, TOK, and other IB coursework. | Strong?Grades IA, EE, and TOK drafts. | ~Partial?Can discuss many task types, but each one needs the right prompt. | Strong?Public review options include IA, EE, and TOK review tracks. |
Marks by criterion ?Criterion-by-criterion marks and feedback, not generic advice. | Strong?Shows estimated marks and feedback for each assessment criterion. | ~Partial?Can grade with prompts, but IB rubric fidelity depends on user setup. | Strong?Review service provides predicted scores and criterion-linked improvement guidance. |
AI detection ?Integrity checks are native, not a separate purchase. | Strong?20-50 paid-tier AI checks monthly. | ×No?No first-party academic AI-detection checker in ChatGPT product flows. | ×No?No built-in AI-detection check is advertised. |
Specific tips ?A clear list shows students what to fix first. | Strong?Pairs comments with a short list of changes to make next. | ×No?Students must prompt it to return a useful list of specific fixes. | ×No?Specific comments come mainly through each paid review. |
Quick ?Fast feedback leaves time to edit and check another version. | Strong?Fast feedback leaves time to edit and check another version. | Strong?Most text responses appear immediately. | ×No?Human examiner review can take longer than instant AI-first loops. |
Human review ?Human review can help edge cases but usually adds time and cost. | ×No?Uses AI feedback rather than a human examiner review. | ×No?Not an examiner review marketplace. | Strong?Core value prop: real examiner review plus exemplars. |
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?The subscription is not priced specifically for grading coursework. | ×No?Per-submission review pricing can become expensive for frequent weekly draft cycles. |
| 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 official IB textbook or revision library bundled by default. | ×No?No online textbook product is offered. |
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 built-in simulation library for IB concept learning. | ×No?No public simulations library is positioned. |
Available for free ?Free learning content removes friction for everyday revision. | Strong?Core simulation and revision resources are publicly accessible. | ×No?Study support is chat-based, not free textbook content delivery. | ~Partial?Some resources are accessible with free accounts; detailed reviews are paid. |
| Oral practice | |||
Practice and get feedback ?Oral practice should include structured scoring feedback. | Strong?Built-in oral practice returns feedback after each attempt. | ~Partial?Can simulate an oral, but the student must set up the IB format in the prompt. | ×No?Not marketed as an oral/IO practice system. |
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?Oral practice is possible, but no ready-made IB oral setup is included. | ×No?No oral practice feature is advertised. |
| 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 official IB questionbank library bundled by default. | ×No?No dedicated IB question-practice bank is provided. |
| 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?Public product is not a batch grading pipeline. | ×No?Reviews are bought one submission at a time. |
Export grading results in bulk ?Exportable outputs simplify moderation and record-keeping. | Strong?Feedback outputs can be reused and shared for iteration. | ×No?No structured bulk export of grading results by default. | ~Partial?Delivers detailed output per submission, but no public bulk export flow. |
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Frequently Asked Questions
What makes Marksy different from ChatGPT or Clastify?
Marksy is made for checking several IB drafts and is rated strong for grading value, compared with no for ChatGPT and no for Clastify. Current public prices: Marksy — $0 entry with 5 full gradings/month, then paid student plans from $14.99/month. ChatGPT — Free tier is available, with paid plans publicly listed around Plus ($20/month) and Pro ($200/month). Clastify — Base access can start around $12.99/month, with per-submission review pricing (TOK $44.99, IA $49.99, EE $59.99). Marksy leads 14 rows against ChatGPT, especially IB oriented and Specific tips, and 13 rows against Clastify, especially Specific tips and Good price for grading drafts.
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 ChatGPT vs Clastify at 3-6, while Marksy still leads as the practical grading-first alternative.