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Best system prompt for DeepSeek V4 Flash creative writing?

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I'm trying to get DeepSeek V4 Flash to actually write decent prose for a sci-fi novella I'm entering into a local contest next month. I've looked at those mega prompts on GitHub but they seem way too bloated for a fast model like Flash and some guys on Discord were saying XML tags help while others say just keep it simple. Im just confused if I should be feeding it specific style guidelines or if that makes it more robotic.

Heres what I need:

  • No purple prose or tapestry words
  • Strong character voices
  • Fast output since I'm on a tight timeline
  • Sticking to the cheap API tier for now

Should I use a persona prompt or just list out negative constraints like dont use cliches?


11

Unfortunately, my experience with DeepSeek V3 API showed simple negative lists were disappointing.

  • XML tags: Strongest adherence.
  • Persona: Often results in cliches. Use XML to keep character voices consistent.


11

Stumbled upon this because I was also nervous about wasting credits. Using TypingMind Desktop App helped me test small prompts safely. Tbh, just giving the model one solid paragraph describing the tone's a decent option. It works better than those massive GitHub prompts that'll make the prose feel stiff. Sticking to simple instructions and setting temperature to 0.7 kept everything fast for me.


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