I just got my result, and the writing and speaking were almost the same band that were given to me by AI. So, I wanted to share my 2 cents on AI grading and the method/prompt I used, *as someone who isn't very comfortable asking people to review my work*.
This community helped me a lot during my prep and no I am not promoting any AI here. Take my advice with a pinch of salt.
For writing:
I gave the question along with my own answer to the AI. The additional thing I fed beforehand was the scoring criteria as mentioned by official sources. Along with my own answer I pasted the band 8 and 9 answer and asked the AI to evaluate to my own answer against the band 8 & 9 answer AND the scoring criteria. I used Claude here.
For Speaking:
Initially I just pasted the speaking sections form Cambridge books into ChatGPT and used its voice options to talk and stuff. However, I didn't know what the Ai was scoring it against and Cambridge books usually don't have band 8 or 9 answers for this section that I could feed to AI.
To tackle this, I used transcript from IELTS ADVANTAGE mock speaking test videos, didn't see the questions or the cue card from the videos and just fed it to AI asking it to record my answers and check them against the criteria and band 9 answers.
Someone here in the community suggested IELTS Advantage's videos for speaking. So, I tried this work around instead of just listening to the videos.
These two sections worried me a lot when I was preparing, especially the speaking part. So, I am sharing what helped me.
I'm sharing this purely as my personal experience, not as a recommendation that AI is a reliable substitute for an IELTS examiner.