{"observation":{"id":"55a451f9-31f1-4231-abb6-35e43cc6eac9","tool":"synthesia","tool_name":"Synthesia","criterion":"avatar-realism","criterion_name":"Avatar realism","criterion_definition":"How believable the presenter looks and how uncanny or AI-obvious the avatar appears, including lip-sync plausibility.","criterion_evidence_type":"transformation","criterion_rank_role":"decisive","criterion_rank_role_reason":"This ranking is about whether the avatar convincingly plays the creator in the ad; if it looks uncanny or AI-obvious, the core product has failed. (3 of 3 judges)","scenario":"duolingo-mobile-app","scenario_name":"Duolingo – Mobile App","group_tag":null,"scenario_description":"A short-form UGC-style video ad prompt for a consumer mobile app, designed to test whether a tool can explain app benefits simply and persuasively in a social ad format.","modality":"text","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":"worked","score":null,"score_total":null,"note":"The generated presenter delivered smoothly with maintained lip-sync, so the avatar reads as technically coherent in preview.","evidence_state":"verified","source":null,"artifacts":[{"url":"https://d3epheqghktydj.cloudfront.net/synthesia-synthesia-duolingo-output-mp4-0d456a3e7949.mp4","role":"output","alt":null}],"run_id":"f91a51ec-b400-46fe-97f5-7e779fe17532","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":"text","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/55a451f9-31f1-4231-abb6-35e43cc6eac9","api_url":"https://ai.aidemos.com/v1/observations/55a451f9-31f1-4231-abb6-35e43cc6eac9"},"peers":[{"id":"0f346770-a179-4bc3-b870-28b632e326a7","tool":"akool","tool_name":"AKOOL","verdict":"struggled","score":null,"score_total":null,"note":"The presenter still reads as AI-generated compared with higher-end tools.","artifact_count":2,"thumbnail":"https://d3epheqghktydj.cloudfront.net/akool-akool-duolingo-output-mp4-0587504273b1.mp4","evidence_url":"https://aidemos.com/evidence/0f346770-a179-4bc3-b870-28b632e326a7"},{"id":"35a90460-b527-402d-91f7-1b1aca55a68c","tool":"creatify-ai","tool_name":"Creatify.ai","verdict":"worked","score":null,"score_total":null,"note":"The avatar looks realistic and holds attention well enough for a mobile-app ad, with speech and lip movements aligned naturally.","artifact_count":1,"thumbnail":"https://d3epheqghktydj.cloudfront.net/creatify-ai-creatify-duolingo-output-mp4-cd57ec72e856.mp4","evidence_url":"https://aidemos.com/evidence/35a90460-b527-402d-91f7-1b1aca55a68c"},{"id":"422c1995-6ddd-4b50-9336-76d3c1f3a077","tool":"topview-ai","tool_name":"Topview AI","verdict":"struggled","score":null,"score_total":null,"note":"The presenter still looks AI-like, and minor lip-sync mismatches remain visible.","artifact_count":2,"thumbnail":"https://d3epheqghktydj.cloudfront.net/topview-ai-topview-duolingo-output-mp4-7d3696bd9cad.mp4","evidence_url":"https://aidemos.com/evidence/422c1995-6ddd-4b50-9336-76d3c1f3a077"},{"id":"b391a3f3-4771-430c-96c5-6fcef7c408ef","tool":"vidnoz-ai","tool_name":"Vidnoz AI","verdict":"struggled","score":null,"score_total":null,"note":"The presenter still looks AI-generated compared with higher-end tools, so the avatar does not fully pass as a natural human creator.","artifact_count":2,"thumbnail":"https://d3epheqghktydj.cloudfront.net/vidnoz-ai-vidnoz-duolingo-output-mp4-57c355c6055f.mp4","evidence_url":"https://aidemos.com/evidence/b391a3f3-4771-430c-96c5-6fcef7c408ef"}],"other_criteria":[{"id":"28aba236-a72c-4612-a82b-a0b9bbf5b2cf","criterion":"script-quality-persuasiveness","criterion_name":"Script quality & persuasiveness","rank_role":"decisive","verdict":"struggled","score":null,"score_total":null,"note":"The presentation felt less engaging for UGC ads and showed limited emotional expressiveness, reducing creator authenticity.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/28aba236-a72c-4612-a82b-a0b9bbf5b2cf"},{"id":"6bb66dd6-5db5-4879-839e-41bf7c137fcf","criterion":"voice-quality","criterion_name":"Voice quality","rank_role":"decisive","verdict":"worked","score":null,"score_total":null,"note":"The voice stayed clear and well-paced, supporting easy comprehension.","artifact_count":1,"evidence_url":"https://aidemos.com/evidence/6bb66dd6-5db5-4879-839e-41bf7c137fcf"}],"appears_in":[{"page_type":"tool","slug":"creatify-ai","title":null,"url":"https://aidemos.com/tools/creatify-ai","binding":"run"},{"page_type":"tool","slug":"synthesia","title":null,"url":"https://aidemos.com/tools/synthesia","binding":"run"},{"page_type":"tool","slug":"topview-ai","title":null,"url":"https://aidemos.com/tools/topview-ai","binding":"run"},{"page_type":"tool","slug":"vidnoz-ai","title":null,"url":"https://aidemos.com/tools/vidnoz-ai","binding":"run"},{"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":"study"}],"same_scenario":[{"id":"0f346770-a179-4bc3-b870-28b632e326a7","tool":"akool","tool_name":"AKOOL","verdict":"struggled","score":null,"score_total":null,"note":"The presenter still reads as AI-generated compared with higher-end tools."},{"id":"35a90460-b527-402d-91f7-1b1aca55a68c","tool":"creatify-ai","tool_name":"Creatify.ai","verdict":"worked","score":null,"score_total":null,"note":"The avatar looks realistic and holds attention well enough for a mobile-app ad, with speech and lip movements aligned naturally."},{"id":"422c1995-6ddd-4b50-9336-76d3c1f3a077","tool":"topview-ai","tool_name":"Topview AI","verdict":"struggled","score":null,"score_total":null,"note":"The presenter still looks AI-like, and minor lip-sync mismatches remain visible."},{"id":"b391a3f3-4771-430c-96c5-6fcef7c408ef","tool":"vidnoz-ai","tool_name":"Vidnoz AI","verdict":"struggled","score":null,"score_total":null,"note":"The presenter still looks AI-generated compared with higher-end tools, so the avatar does not fully pass as a natural human creator."}]}