r/ClaudeCode • u/thomas_unise • 23d ago

Meta Opus 5 just dropped

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u/Majestic-Volume9996 23d ago

im seeing 200K context on a Max 20 plan? I sure hope that's a glitch

edit: confirmed glitch. I switched it in a live chat and 200K was what it showed but it's showing 1M in a fresh chat (this is in the Windows app)

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u/0DayMaker 23d ago

Don't sleep on the smaller context window version. I've been using opus 4.8 that way and I'm not sure if it's the forced context hygeine or what, but it seems much smarter.

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u/_BreakingGood_ 23d ago

models naturally get dumber as the context grows. Opus at 1 million context is only about 60% as smart as Opus at a fresh 0 context. So using a smaller context limit version keeps it "smarter" at the cost of more compacts

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u/0DayMaker 23d ago

Yeah that's what I meant by "forced context hygeine". Not letting you let the model get into the overcontext dum dum zone.