Astra 与 Fable 5.1 做 Meta 广告对比实测
同一脚本、同一渲染器下对比两模型写广告提示词：Astra 成片更稳更完整，但开头钩子不如 Fable 抓人，作者给出修补默认风格的提示词指南。
GPT-6 Astra just dropped, and it's INSANE for making meta ads BUT Fable 5.1 still does 1 thing better. We ran both through the same harness. Same brief, same product, same renderer — Seedance 2.5. Each model writes the prompt. We render both. We compare. Astra won the body. Not close. Cleaner scene transitions. Product stays consistent shot to shot. Pacing holds all the way through. The last 7 seconds of an Astra ad look like something an agency actually shipped. Then you watch the first 3. Fable's hooks stop the scroll. Astra's hooks start the ad. Our best read on why: Astra is built to complete work. OpenAI's own launch post says it's their best model at following templates and producing structured narratives. Polished. Thorough. Even. That's exactly what a body needs. It's the opposite of what a hook needs. A hook is unfinished on purpose. It's a question, not an answer. Thoroughness kills it. Give Astra a 4-beat brief and it writes 4 equal beats. Beat 1 has to be disproportionately loud. It isn't. Good news: it's fixable in the prompt. We wrote a prompting guide for Astra that patches the defaults it ships with. Hook-first structure. Asymmetry rules. The exact brief format that works with Seedance 2.5 for Meta ads. Comment "hook" and I'll send it. Both ran on HeyOz — every model, side by side, same product.