Mark a class of 30
for £1.50
Pay only for what you use. Start with 10 free credits — no card required.
That's 30 students × 1 credit each, using the 50-credit bundle at £2.50.
Credit costs per operation
Fast Model
1 credit
per student marked
Class of 30 = £1.50
- Quick turnaround
- Great for routine marking
Smart Model
4 credits
per student marked
Class of 30 = £6
- Deeper analysis
- More detailed feedback
Always free
These features are included at no extra cost:
- Transcription
- AI formatting cleanup
- Grading format detection
- Unlimited assessments
Credit bundles
Purchase credits in bundles. Larger bundles offer better value.
£2.50
£0.050 per credit
£5.00
£0.050 per credit
£10.00
£0.040 per credit
£17.50
£0.035 per credit
Sign up to purchase credits and start marking.
Frequently asked questions
How do credits work?
Credits are deducted when you mark student work. The cost depends on which AI model you choose: Fast model uses 1 credit and Smart model uses 4 credits. Transcription and format detection are always free.
What happens if marking fails?
If the AI fails to process your request due to a technical error, your credits are automatically refunded. You'll see the refund in your credit history with a note explaining what happened.
Do credits expire?
No, credits never expire. Use them whenever you need them.
What's the difference between Fast and Smart models?
The Fast model (Gemini Flash) is optimized for speed and works great for routine marking tasks. The Smart model (Gemini Pro) provides deeper analysis and more nuanced feedback, ideal for complex assessments or when you want the most thorough evaluation.
Can I get more free credits?
Every new account receives 10 free credits. We may offer promotional credits from time to time. Follow us for updates on special offers.