Latour pretty explicitely thinks of himself as a post Marxist - one of his latest work was "la nouvelle classe ecologique" where he was making the point that environmental questions were the new Class Struggle and his work a continuation of Marxism in another context.

Marxist intellectuals have been accusing him and his followers of using marxist tools while giving up on anti-capitalism

https://www.babelio.com/livres/Latour-Memo-sur-la-nouvelle-c...