{"id":13595,"date":"2026-05-22T20:52:42","date_gmt":"2026-05-22T20:52:42","guid":{"rendered":"https:\/\/comparateur-ia.io\/outils-ia\/thesys\/"},"modified":"2026-05-22T20:52:42","modified_gmt":"2026-05-22T20:52:42","slug":"thesys","status":"publish","type":"outil_ia","link":"https:\/\/comparateur-ia.io\/en\/outils-ia\/thesys\/","title":{"rendered":"Thesys"},"content":{"rendered":"\n\n<p class=\"tool-description\">Thesys offers __C1__, a __Generative UI API__ that transforms LLM responses (OpenAI, Anthropic, Gemini\u2026) into interactive UI components: forms, tables, charts, and dynamic layouts. __OpenAI-compatible__, C1 integrates with any framework via its React SDK. The __C1 Artifacts API__ enables generation of slides and complete reports directly in your applications. A no-code Agent Builder is also available to create agents that respond with UI rather than plain text. The freemium model with __$10 in credits__ offered upon signup makes getting started accessible.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">What is Thesys?<\/h2>\n\n\n\n\n\n<p>C1 by Thesys is an LLM endpoint compatible with the OpenAI standard, designed to return structured UI components rather than plain text. When an agent uses C1, its responses are automatically transformed into React components rendered via the official SDK. The tool connects to external data through standard tool calls \u2014 databases, documents, REST APIs \u2014 ensuring interfaces are always fed by fresh data. A no-code Agent Builder allows prototyping agents without writing code.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Key Features<\/h2>\n\n\n\n\n\n<p>C1 offers several key capabilities. Dynamic UI component generation includes interactive forms, data tables, analytical charts, and complex layouts generated in real-time. The OpenAI-compatible endpoint enables quick migration from existing LLM integrations. The C1 React SDK simplifies component rendering on the client side. The C1 Artifacts API enables creation of complete slides and reports integrated into applications. The no-code Agent Builder allows creating and testing agents visually without writing code. Finally, the platform is compatible with all major LLMs on the market.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Use Cases<\/h2>\n\n\n\n\n\n<p>Thesys applies to many scenarios. Internal analytics tools can display dynamically generated dashboards based on user questions. AI CRMs can present enriched customer profiles in response to sales requests. Educational platforms can generate interactive exercises on the fly. Reporting tools can automatically create presentations from raw data, significantly reducing preparation time.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Advantages<\/h2>\n\n\n\n\n\n<p>The main advantage of Thesys is dramatically improving the user experience of AI applications: instead of reading a paragraph of text, the user interacts with data presented visually. For developers, integration is minimal thanks to existing OpenAI compatibility. The pay-as-you-go model avoids high fixed costs in the startup phase, and 100 free artifacts pages per month allows moderate usage without fees.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Pricing<\/h2>\n\n\n\n\n\n<p>Thesys offers an Essentials plan at $0 with $10 in credits offered upon signup, no credit card required. The C1 Artifacts API offers 100 free pages per month, then $0.01 per operation. Billing is then entirely usage-based, with no mandatory monthly subscription. An Enterprise plan with private deployment, enterprise SLA, SOC2\/GDPR\/ISO 27001 compliance, and a dedicated engineer is available upon request.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n\n\n<p>Thesys represents a promising technology building block for developers who want to evolve their AI agents toward rich conversational interfaces. Its accessible freemium positioning, universal compatibility with LLMs, and React SDK make it a serious option for any project looking to go beyond the text chatbot.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Strengths<\/h2>\n\n\n\n\n\n<ul class=\"wp-block-list\">\n\n<li><strong>Generative UI<\/strong>: transforms LLM outputs into interactive components<\/li>\n\n<li><strong>OpenAI-compatible<\/strong> endpoint, integration in just a few lines of code<\/li>\n\n<li>Compatible with all <strong>major LLMs<\/strong> (OpenAI, Anthropic, Gemini\u2026)<\/li>\n\n<li><strong>C1 Artifacts API<\/strong> for generating slides and reports in real-time<\/li>\n\n<li>Free tier with <strong>$10 in credits<\/strong> to get started without a credit card<\/li>\n\n<li><strong>Agent Builder<\/strong> no-code to create agents with visual interface<\/li>\n\n<\/ul>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Limitations<\/h2>\n\n\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>Tool designed for <strong>developers<\/strong>, little accessible to non-technical users<\/li>\n\n<li>Young documentation with <strong>limited examples<\/strong> for advanced cases<\/li>\n\n<li>Usage-based billing that can become expensive at <strong>high volume<\/strong><\/li>\n\n<li>Interface and resources in <strong>English only<\/strong><\/li>\n\n<\/ul>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions<\/h2>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is Generative UI?<\/summary>\n\n\n\n<p>Generative UI is an approach where AI generates interface components (tables, charts, forms) in response to requests, rather than plain text.<\/p>\n\n\n\n<\/details>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Do you need a paid account to use Thesys?<\/summary>\n\n\n\n<p>No, Thesys offers $10 in free credits without a credit card required. Usage-based billing begins once credits are exhausted.<\/p>\n\n\n\n<\/details>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Is Thesys compatible with Anthropic models?<\/summary>\n\n\n\n<p>Yes, C1 works with all major LLMs including Anthropic models, OpenAI, Google Gemini, and many others.<\/p>\n\n\n\n<\/details>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the C1 Artifacts API?<\/summary>\n\n\n\n<p>The C1 Artifacts API allows generating slides, reports, and structured documents directly in your applications, in real-time.<\/p>\n\n\n\n<\/details>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can you use Thesys without coding?<\/summary>\n\n\n\n<p>A no-code Agent Builder is available for prototyping agents, but full C1 API integration requires development skills.<\/p>\n\n\n\n<\/details>\n\n","protected":false},"excerpt":{"rendered":"<p>Generative UI API that transforms LLM responses into interactive UI components \u2014 tables, charts, forms \u2014 in real-time.<\/p>\n","protected":false},"author":2,"featured_media":30015,"template":"","meta":{"cia_url_outil":"https:\/\/www.thesys.dev","cia_affiliate_url":"","cia_prix":"Free \/ Pay-as-you-go","cia_devise":"USD","cia_date_test":"","cia_highlight":"The API that converts the output of any LLM into living and adaptive user interfaces.","cia_logo":"\/partners\/thesys.png","cia_og_image":"","cia_partner":"thesys","cia_json_id":"thesys","cia_verdict":"Thesys fills an important gap in the AI agent ecosystem: the ability to respond with a __dynamic user interface__ rather than plain text. This approach, called __Generative UI__, represents a natural evolution of chatbots and AI assistants, which can now present data and results in the form of interactive tables, charts, or forms.\n\nThesys's main strength is its __OpenAI compatibility__: any existing application using the OpenAI API can migrate to C1 with minimal changes. The React SDK allows integrating generated components directly into a web application in just a few lines of code. The __C1 Artifacts API__ adds another dimension by enabling real-time creation of structured documents (slides, reports).\n\nThe pricing model is particularly attractive for startups: __$10 in free credits__ to get started, then usage-based billing. The first 100 artifact pages per month are free. 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Usage-based billing begins once credits are exhausted.\"},{\"q\":\"Is Thesys compatible with Anthropic models?\",\"a\":\"Yes, C1 works with all major LLMs including Anthropic models, OpenAI, Google Gemini, and many others.\"},{\"q\":\"What is the C1 Artifacts API?\",\"a\":\"The C1 Artifacts API allows generating slides, reports, and structured documents directly in your applications, in real-time.\"},{\"q\":\"Can you use Thesys without coding?\",\"a\":\"A no-code Agent Builder is available for prototyping agents, but full C1 API integration requires development skills.\"}]","cia_languages":"[\"Anglais\"]","cia_read_more":"[{\"href\":\"\/comparatifs\/ia-no-code-automatisation\",\"title\":\"Comparatif des outils IA no-code et automatisation\",\"desc\":\"Les meilleures solutions pour automatiser vos workflows avec l'IA.\"},{\"href\":\"\/comparatifs\/ia-code-developpement\",\"title\":\"Top outils IA pour les du00e9veloppeurs\",\"desc\":\"Comparatif des IDE et API IA pour les u00e9quipes techniques.\"}]","cia_seo_title":"","cia_seo_description":"","cia_seo_h1":"","cia_review_seo_title":"","cia_review_seo_desc":"","cia_created_at":"2026-04-05","cia_updated_at":"2026-04-05","cia_note_globale":4.6,"cia_note_count":57,"cia_prix_mensuel":0,"cia_ranking":999,"cia_verified":true,"cia_featured":false,"cia_selection":false,"cia_is_affiliate":false,"cia_has_review":true,"cia_trial":true,"cia_langue_fr":false,"cia_api_disponible":false,"footnotes":""},"categorie-ia":[177,178],"tag-ia":[123,208],"tarification":[14],"niveau-utilisateur":[],"metier":[],"class_list":["post-13595","outil_ia","type-outil_ia","status-publish","has-post-thumbnail","hentry","categorie_ia-code-development","categorie_ia-no-code-automatisation","tag_ia-agents-ia","tag_ia-integrations-apis","tarification-gratuit"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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