Negative three years, give or take. Although recent Anthropic and OpenAI models no longer expose the capability. But for any open model you just tell it to respond with a single token "Y/N" and take the logit difference. If you want multiple distinct questions answered you just ask them independently and put the shared context first so it gets cached.

OpenAI and Anthropic don't want to give out logprobs these days but could trivially add a dedicated classification API to their existing models if there was enough demand.