Launched January 6, 2026
Thesys

Thesys

The Generative UI company

SubscriptionAPI243 impressions#1586 of its week

We’re building the UI for AI. At Thesys we have built C1, the first production-ready Generative UI API. It lets AI products respond with fully interactive UI in real time. With C1, instead of plain-text answers, agents deliver dashboards, forms, lists, and other rich interfaces that adapt to each query and context. Most AI products still rely on text, which hurts engagement, or teams spend countless hours wiring LLM output to brittle UI templates. Doing this manually is slow to build, hard to maintain, and impossible to scale. C1 changes that. We work with fast-moving startups and large enterprises to power copilots, internal tools, and assistants with intelligent generative interfaces.

Thesys provides a Generative UI API that lets AI applications return interactive dashboards, forms, charts and reports in real time.

for
AI product teams building interactive interfaces for copilots, internal tools, and assistants.
pricing
freemium
works withOpenAIAnthropicOpenRouter

Key features

6 features of Thesys
  • Generative UI API — C1 API returns rich UI components (dashboards, forms, charts) instead of plain text.
  • Real-time rendering — UI updates adapt instantly to each query and context.
  • Model-agnostic — Works with any LLM key or OpenRouter models, including free models.
  • Style customization — Customize visual style of generated components.
  • API key management — Generate and manage keys per plan with usage limits.
  • Artifacts API — Generate slides and reports; first 100 pages free, $0.01 per page thereafter.

Use cases

  • Add interactive dashboards to an AI-powered analytics assistant.
  • Enable a chatbot to present forms for data entry on the fly.
  • Generate charts and slides for AI-driven reporting tools.
  • Build internal AI copilots that surface actionable UI widgets.

Thesys pricing

  • Free$0/mo.3K API calls / month · Bring your own LLM key · Style customizations · Discord community support
  • Build$49/mo./month25K API calls / month · Higher request priority · Email support · $0.002 per extra call
  • Grow$499/mo./month500K API calls / month · Highest request priority · Priority support & solutions engineering · $0.001 per extra call

Thesys vs alternatives

ThesysPostmanOpenRouterReplicateDirectus
Best forGenerative UI for AI appsAPI design & testingModel aggregationModel executionContent management
PricingFreemiumSubscriptionSubscriptionSubscriptionFree
DevHunt upvotes00000
LaunchedJan 2026————

Thesys FAQ

What does the Generative UI API return?+

It returns interactive UI elements such as dashboards, forms, charts, slides and reports instead of plain-text responses.

Can I use my own LLM with Thesys?+

Yes, you can bring your own LLM key or use models via OpenRouter, including free models.

How are LLM token costs billed?+

LLM tokens are billed separately at the provider’s rates; the API call quota is included in each plan.

Is there a free tier for testing?+

The Free plan offers 3K API calls per month, style customizations, and community support at $0.

What enterprise features are available on the Scale plan?+

Self-hosting or VPC deployment, custom rate limits, compliance guarantees, and priority support.

Summarized by DevHunt from thesys.dev · Oct 8, 2026. Details may change; check the official site.