Realistically could I get into a humanities course at Oxford

GCSEs I don't think are an issue, the predicted B in one of your subjects is probably going to make things a bit of a long shot. Would be much better if you could get that up to a predicted A.
Which course did you want to apply to?

I’m in year 13 so i would be applying for 2026 with my final results, so hopefully i will get A*A*A I was thinking along the lines of History of Art or English Literature. Yeah I hope my GCSEs wouldn’t be too much of an issue, the 5 in maths I was mainly worried about

Currently in year 13
Predicted grades:
A* - English lit
A* - Art
B - Law
Mock grades
A* - English Lit
A* - Art
A - Law
GCSEs
9 - English lit
9 - Art
9 - Media
8 - English Language
8 - Geography
7 - French
7-6 Combined Sciences
5 - Maths
I don’t know if my GCSEs would be high enough
If anybody has any ideas I’d be curious to know thank you

I don't believe they have any grade requirements for GCSE Maths?
I'd focus on picking which course you're interested in however, those are pretty different areas!
Worth also noting the Course II option in English lit which allows for more of a focus on e.g. manuscript studies and such if that's of interest.

You're going to need A Levels or Level 3 qualification to get higher enough.

That’s good, I have offers for both of those courses at 2 Russell groups so I was just curious if I couldn’t potentially try Oxford next year, thank you for your help<3

Do you mean like an extra a level in addition?

I don't see any reason why not.
I would also not overly fixate on whether a uni is in the RG or not, as it's essentially meaningless as far as undergraduate studies are concerned. Also notably one of the strongest art history courses in the UK is offered by a provider not in the RG (i.e. the Courtauld).

No, I think they were commenting you need to do A-levels or equivalent since it wasn't completely clear that the first 3 grades were for A-levels (which I just assumed).

Do you mean like an extra a level in addition?