Generating a Repo Promo Video with a Claude Skill on Sonnet 5.5 vs Opus 5.5

Melvin Vivas · X video post · 2026-10-02 · 0:30 · 489 views · Open on X

Topics: AI Dev Tools & Productivity, LLM Fundamentals, AI Agents, Tool Use & MCP · Level: intermediate

Summary

Melvin Vivas shows a 30-second motion video he made by running his custom "motion-reel" skill with Claude Sonnet 5.5 on a GitHub repo (donvito/jev-dev). He says Sonnet 5.5's output is comparable to Opus 5.5's and costs less. The takeaway is that a reusable agent skill plus a cheaper model can do repeatable creative work, like promo reels for a codebase.

Key points

• The creator wrote his own reusable skill, "motion-reel", that turns a code repository into a short motion video (reel).
• He ran the skill on the donvito/jev-dev repo (a UI tool for experimenting with Jev by Typesafe.ai) to make the 30-second video.
• In his view, Claude Sonnet 5.5's output with this skill is comparable to Opus 5.5's.
• Sonnet 5.5 is cheaper than Opus 5.5, so for a well-defined, skill-driven task, try the smaller model before paying for the bigger one.
• Wrapping a repeatable workflow in a skill lets you reuse it on any repo and compare models on the same task.
• The video has no speech. The details of how the skill works are not shared, and the motion-reel skill itself is not linked.

Resources mentioned

• donvito/jev-dev · repo · github.com · free
  UI tool for experimenting with Jev by Typesafe.ai that keeps a history of past runs.
  Also in: JevDev: Open-Source UI Tool for Experimenting with Jev (Typesafe.ai) (Melvin Vivas on X · notes), jev-dev: A UI Tool to Keep Run History When Experimenting with Jev (Melvin Vivas on X · notes), JevDev: Open-Source UI for Experimenting with Jev by Typesafe.ai (Melvin Vivas on X · notes)
• motion-reel skill · tool · check price
  The creator's custom agent skill that makes short motion videos (reels) from a code repository.
• Claude Sonnet 5.5 · tool · anthropic.com · paid
  Anthropic's newly released mid-tier Claude model, reported to be strong at agentic coding.
  Also in: Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), GPT-6.1 and Sonnet 5.5 Released the Same Week (Melvin Vivas on X · notes), Use Sonnet 5.5 instead of Opus 5.5 for faster video-clipping tasks (Melvin Vivas on X · notes), Advisor/Executor setup in Claude Code: Opus 5.5 plans, Sonnet 5.5 runs (Melvin Vivas on X · notes) and 2 more
• Claude Opus 5.5 · tool · claude.ai · paid · open in a browser to verify · recommended by both Bashiri Smith & Melvin Vivas
  Anthropic's AI assistant, used throughout the guide to tailor resumes, add live roles to the tracker, match connections to target companies and find hiring managers.
  Also in: Comparing Coding Models on the Same Task in Devin iOS (Melvin Vivas on X · notes), Customizing Your Coding Setup with Pi Coding Agent Extensions (Melvin Vivas on X · notes), AI Engineer Roadmap Overview: From ML Foundations to RAG, Agents & Ops (Bashiri Smith on Facebook · notes), LLM Council Agent in Pi Using Codex and Claude Models (Melvin Vivas on X · notes) and 53 more
• Jev · tool · typesafe.ai · paid
  A decision model that makes turn-level forecasts on AI agent conversations using only structural signals (turns, tool calls, workflow stages, timing).
  Also in: GLiDE by Fastino Labs: A Post-Trainable Reasoning Decision Model (Melvin Vivas on X · notes), Using Jev as a Reranker to Augment RAG Retrieval (Melvin Vivas on X · notes), Using Jev (TypeSafe AI) as a Decision Model for Email Classification (Melvin Vivas on X · notes), Jev Decision Model: Forecasting AI Receptionist Calls from Structure Alone (Melvin Vivas on X · notes) and 12 more

Try this

• Try running the same skill or task on Sonnet 5.5 and Opus 5.5 and compare output quality against cost.
• Check out the donvito/jev-dev repo.
• Build an agent skill that reads a GitHub repo and generates a short motion-graphics promo reel for it.