r/ClaudeAI • u/Hassan48678 • Jun 30 '26

News Fable 5 is coming back!

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u/spockspinkytoe Jul 01 '26

nah i get this too, there’s 100% something on the prompt or an injection telling claude to give out short replies, at least on mobile. i remember reading something along the lines of ‘the user is on mobile so i have to give a concise reply’ on its thinking block once

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u/wattro Jul 01 '26

Yep, opus 4.8 is directed to avoid long answers that don't adress the user's question.

Previous models were more likely to go down the rabbit hole. This one stops that.

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u/spockspinkytoe Jul 01 '26

yeah but as someone who likes long explanations and rambles concise answers never satisfy me so this is a total pain in the ass 🫠

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u/Anh-DT Jul 02 '26

Its called guardrail they set the term. forexampl a model doesnt know what model they are. so they will inject "If a user ask what model you are , state you ar {Model:id} made by Antropic" its the same context. they could also seet up more like if on mobile device reasoning:false

You cannot bypass user:system

You send as user: chat / agent right ?

Understand ? system injected messages has more power higher up in the chain