Perplexity Sonar Pro
Live web research with cited sources. Grounded documents, not guesswork.
Perplexity Sonar Pro searches the live web, synthesises findings, and returns cited answers. In Stensyl, it powers the research-enhanced document mode: before Claude writes your document, Perplexity pulls current planning policies, site context, demographic data, material specs, and design precedents from verified sources. Every claim in your document links back to its source.
Try these prompts
How it works
Describe your brief
Type what you need: a proposal, case study, specification, or creative copy.
Choose model and document type
Pick your writing model and document length. See the credit cost before you generate.
Draft generated in seconds
Your document is drafted and ready to review, edit, copy, or export. Iterate or switch models.
Ready to draft with Perplexity Sonar Pro?
Jump into the Studio and start writing. Plans from £10/month.
Choose a PlanDocuments grounded in live research, not training data.
Most AI writing tools generate documents from static training data. Perplexity Sonar Pro is different. It searches the live web in real time, pulling current planning policies, conservation area appraisals, demographic datasets, and material specifications from authoritative sources. Then Claude takes that grounded research and writes your document. Every policy reference is current. Every statistic has a source.
For design professionals writing planning submissions, this changes everything. A Design and Access Statement that references the correct local plan policies, not policies from two years ago. A feasibility study with current market data, not training-data averages. A heritage statement citing the actual conservation area appraisal for that specific neighbourhood.
The research layer runs automatically when you enable it in the Draft Document panel. Enter your site address, select your document type, and Perplexity handles the desk research. Domain filtering ensures results come from authoritative sources: .gov.uk for planning policy, Historic England for heritage, ONS for demographics. Your document arrives with a full references section, every claim traceable to its source.
Automated planning policy research
Enter a site address and Perplexity pulls the relevant local plan policies, supplementary planning documents, conservation area status, and transport considerations. No more tabbing between council websites. The research feeds directly into your document as grounded context, not hallucinated policy numbers.
Cited sources on every document
Every research-enhanced document includes a full references section with numbered source URLs. When your client or planning officer asks where a figure came from, you can point to the exact source. This is the difference between AI-assisted writing and AI-generated guesswork.
Domain-filtered for authority
Perplexity does not search the entire web indiscriminately. Stensyl configures domain filters per document type. Planning documents pull from .gov.uk and planningportal.co.uk. Heritage statements from Historic England. Sustainability reports from BRE Group and Passivhaus Trust. The research is as rigorous as the document it supports.
Questions about Perplexity Sonar Pro.
Why Stensyl?
A small indie studio building creative tools the way they should be built. No VC theatre, no funnel games, no faceless support.
Ready to draft with Perplexity Sonar Pro?
Professional document drafting. Plans from £10/month.