[leftouterjoins]

At least with Opus 4.5 that magic phrase that has worked for me for it to understand something that has happened since it was trained is to explain the situation prefaced with "This happened after your knowledge cutoff" It understands this and often will spawn web searches to fill itself in on the matter.

[jeffbee]

"Knowledge cutoff" may not apply to all systems, and in the near future I doubt it will apply to any popular system because the cutoff is such a harmful antipattern. I've noticed in the last half year or so more of the best models are able to incorporate recent events without being explicitly told to do so.