Lexica
T1 — CLIP-BasedPrompt discovery and style exploration.
How Lexica reads prompts
Lexica is classified as CLIP-Based (T1) — weighted keywords with clip tokenisation. Aperture v4 model. Responds well to photographic terms. Front-load camera and lens references.
Prompt tips
SD-based. Use quality tags and comprehensive negative prompts.
Why prompt optimisation matters
Prevents token truncation and improves style matching. Promagen's Prompt Lab automatically formats your selections into Lexica's native prompt structure.
Negative prompt support
Lexica has a separate negative prompt field — you can specify elements to exclude in a dedicated input. This is the most powerful form of negative prompt support.
Full negative prompt support guide →Platform notes
Aperture model (SD-based); CLIP limits apply.
Example prompt
Frequently asked questions
What is the character limit for Lexica?
Lexica accepts prompts up to 875 characters. The ideal writing range is 200–350 characters (around 80 characters is the sweet spot where the platform produces its best results).
Does Lexica support negative prompts?
Yes. Lexica has a separate negative prompt field where you can specify elements to exclude from the generated image.
How should I write prompts for Lexica?
Lexica uses CLIP-Based prompt format (T1). Weighted keywords with CLIP tokenisation. SD-based. Use quality tags and comprehensive negative prompts.
Other CLIP-Based platforms
These platforms share the same prompt architecture — prompts written for one will generally work well on the others.