{"observation":{"id":"b90aa48d-0aa8-4205-a720-db42358970da","tool":"synthesia","tool_name":"Synthesia","criterion":"script-quality-persuasiveness","criterion_name":"Script quality & persuasiveness","criterion_definition":"Strong hook, clear value proposition, and natural CTA that sounds like UGC rather than a brochure.","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"The whole point is to produce ads that hook viewers and persuade them, so script quality directly determines success. (3 of 3 judges)","scenario":"duolingo-mobile-app","scenario_name":"Duolingo – Mobile App","group_tag":"ugc-style-video-ads","scenario_description":"A short-form UGC promo prompt for a consumer mobile app, designed to test whether the tool can explain app benefits simply and persuasively while generating a realistic AI-presenter video.","modality":"mixed","input_text":"Product URL: https://www.duolingo.com/\n\nExact script:\nHook: Learning a new language has never been this easy.\nScript: I've been using Duolingo for a few minutes every day, and it's made language learning simple and fun. The short lessons are easy to follow, and the daily practice keeps me motivated. If you're planning to learn a new language, give Duolingo a try.\n\nOutput requirements:\n- Vertical (9:16)\n- 20–30 seconds\n- UGC-style AI presenter\n- Natural AI voice\n- Captions enabled","input_artifact_refs":[],"stresses":["Mobile app understanding","Consumer app promotion","Script quality","Avatar realism","Voice quality","Caption quality","Overall ad readiness"],"verdict":"mixed","score":null,"score_total":null,"note":"The Duolingo script explained the app benefits clearly, but the report says the presentation felt less engaging for UGC ads and had limited emotional expressiveness.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://cdn.futuresmart.ai/public/aidemos/ea4c634e3873477ba8e836f199738bcc.mp4?v=1","role":"output","alt":null}],"run_id":"9fdbb84b-4aa0-484d-8f89-5c46608019a5","study_title":"Generate UGC-Style Video Ads With AI Avatars","study_kind":"generation","research_task":"86baxegpg","tested_at":null,"completeness":"input-and-output","input":{"state":"text","text":"Product URL: https://www.duolingo.com/\n\nExact script:\nHook: Learning a new language has never been this easy.\nScript: I've been using Duolingo for a few minutes every day, and it's made language learning simple and fun. The short lessons are easy to follow, and the daily practice keeps me motivated. If you're planning to learn a new language, give Duolingo a try.\n\nOutput requirements:\n- Vertical (9:16)\n- 20–30 seconds\n- UGC-style AI presenter\n- Natural AI voice\n- Captions enabled","files":[],"modality":"mixed","stresses":["Mobile app understanding","Consumer app promotion","Script quality","Avatar realism","Voice quality","Caption quality","Overall ad readiness"]},"tool_page_slug":"synthesia","tool_url":"https://aidemos.com/tools/synthesia","permalink":"https://aidemos.com/evidence/b90aa48d-0aa8-4205-a720-db42358970da","api_url":"https://ai.aidemos.com/v1/observations/b90aa48d-0aa8-4205-a720-db42358970da"},"peers":[{"id":"92102361-70c1-4a8d-a50d-e67a18a661a1","tool":"akool","tool_name":"AKOOL","verdict":"mixed","score":null,"score_total":null,"note":"Communicates the app benefits clearly, but the tone is flat and less engaging, so the UGC pitch is only mildly persuasive.","artifact_count":1,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/ada242395b9642fdacde72d4547aafe9.mp4?v=1","evidence_url":"https://aidemos.com/evidence/92102361-70c1-4a8d-a50d-e67a18a661a1"},{"id":"64e1c84b-48cc-4206-a23d-413108d746c3","tool":"heygen","tool_name":"HeyGen","verdict":"worked","score":null,"score_total":null,"note":"The script is delivered verbatim from start to finish and lands on a natural CTA, ending correctly on 'give Duolingo a try.'","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/e1595503067242cdbfafa0a9676f1a5a.mp4?v=1","evidence_url":"https://aidemos.com/evidence/64e1c84b-48cc-4206-a23d-413108d746c3"},{"id":"8af2d396-37c8-4209-83b4-31ab2c9fbea0","tool":"invideo-ai","tool_name":"Invideo AI","verdict":"worked","score":null,"score_total":null,"note":"The script is reproduced verbatim and reaches the closing CTA line without truncation, so the testimonial structure and call-to-action remain intact.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/2d708f66a6554c76aa83c81aa49797c7.mp4?v=1","evidence_url":"https://aidemos.com/evidence/8af2d396-37c8-4209-83b4-31ab2c9fbea0"},{"id":"b9c96eb7-99ff-44d2-8681-fdec5bcfbe0d","tool":"topview-ai","tool_name":"Topview AI","verdict":"mixed","score":null,"score_total":null,"note":"The app promo is clear, but the tone is flat and less engaging for a language-learning ad.","artifact_count":2,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/804557dc8e114b7b881b3057d7014c4f.mp4?v=1","evidence_url":"https://aidemos.com/evidence/b9c96eb7-99ff-44d2-8681-fdec5bcfbe0d"},{"id":"9594b9b0-6c3c-44e9-8cfa-8a8a2db3f6d9","tool":"vidnoz-ai","tool_name":"Vidnoz AI","verdict":"mixed","score":null,"score_total":null,"note":"Keeps the script simple and clear, but the emotional tone stays neutral, so the promo is serviceable rather than especially compelling.","artifact_count":1,"thumbnail":"https://cdn.futuresmart.ai/public/aidemos/f25b8326c2154e5688b7d75b8d2dc085.mp4?v=1","evidence_url":"https://aidemos.com/evidence/9594b9b0-6c3c-44e9-8cfa-8a8a2db3f6d9"}],"other_criteria":[{"id":"579419d7-0f47-43cb-8d1b-1536ddea14c4","criterion":"ad-readiness","criterion_name":"Ad-readiness","rank_role":"decisive","verdict":"failed","score":null,"score_total":null,"note":"The Duolingo ad was not runnable as-is because downloading required an upgraded plan and the output stayed landscape instead of vertical.","artifact_count":2,"evidence_url":"https://aidemos.com/evidence/579419d7-0f47-43cb-8d1b-1536ddea14c4"},{"id":"a822e15b-a091-4f92-8344-d0bf07c19660","criterion":"avatar-realism","criterion_name":"Avatar realism","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo output used a smooth, centered talking-head avatar, and the report says lip-sync accuracy was maintained.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/a822e15b-a091-4f92-8344-d0bf07c19660"},{"id":"f410dd67-fcba-4ee3-ac8e-1336e9dd7204","criterion":"platform-formats","criterion_name":"Platform formats","rank_role":"context","verdict":"failed","score":null,"score_total":null,"note":"The Duolingo output was generated in landscape rather than the requested vertical 9:16 short-form format.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/f410dd67-fcba-4ee3-ac8e-1336e9dd7204"},{"id":"b2ef26b2-2972-4c88-96b0-547d48165f9f","criterion":"voice-quality","criterion_name":"Voice quality","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The Duolingo voice was reported as clear and well-paced, with no technical issues during generation.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/b2ef26b2-2972-4c88-96b0-547d48165f9f"}],"appears_in":[{"page_type":"ranking","slug":"ugc-video-ad-generators","title":"Best AI Tools for Generating UGC-Style Video Ads With AI Avatars","url":"https://aidemos.com/best/ugc-video-ad-generators","binding":"run"}],"same_scenario":[{"id":"92102361-70c1-4a8d-a50d-e67a18a661a1","tool":"akool","tool_name":"AKOOL","verdict":"mixed","score":null,"score_total":null,"note":"Communicates the app benefits clearly, but the tone is flat and less engaging, so the UGC pitch is only mildly persuasive."},{"id":"64e1c84b-48cc-4206-a23d-413108d746c3","tool":"heygen","tool_name":"HeyGen","verdict":"worked","score":null,"score_total":null,"note":"The script is delivered verbatim from start to finish and lands on a natural CTA, ending correctly on 'give Duolingo a try.'"},{"id":"8af2d396-37c8-4209-83b4-31ab2c9fbea0","tool":"invideo-ai","tool_name":"Invideo AI","verdict":"worked","score":null,"score_total":null,"note":"The script is reproduced verbatim and reaches the closing CTA line without truncation, so the testimonial structure and call-to-action remain intact."},{"id":"b9c96eb7-99ff-44d2-8681-fdec5bcfbe0d","tool":"topview-ai","tool_name":"Topview AI","verdict":"mixed","score":null,"score_total":null,"note":"The app promo is clear, but the tone is flat and less engaging for a language-learning ad."},{"id":"9594b9b0-6c3c-44e9-8cfa-8a8a2db3f6d9","tool":"vidnoz-ai","tool_name":"Vidnoz AI","verdict":"mixed","score":null,"score_total":null,"note":"Keeps the script simple and clear, but the emotional tone stays neutral, so the promo is serviceable rather than especially compelling."}]}