Maybe? RadioTimes.com is quoting Capaldi as saying:
“I’ve been asked to stay on but it’s such a long time before I have to make that decision. Steven’s been absolutely wonderful, so I love working with him. Chris is fantastic, and I think he’s a hugely talented guy. I don’t know where the show’s gonna go then. I don’t know. I have to make up my mind, and I haven’t yet. As Steven will tell you, it’s very difficult to say goodbye.”
Moffat’s 12-episode final season will be broadcast in 2017, with only a Christmas special airing this year. After that, Chris Chibnall will take over the show in 2018. Stay tuned, kids….