Tier S: Ship-to-prod default.
Claude Opus 4.8
Safest default for real product coding.
Our take
Opus 4.8 is the practical ship-to-prod pick after Fable 5 became unavailable. It keeps large codebases together and produces UI that looks intentional.
Best for
- SaaS dashboards
- Client projects
- Multi-file production work
- Continuation after stronger planning models
Watch out
- Higher cost than daily-driver models
- Still benefits from clear goals and review loops
Why it is ranked here
- The video says Opus can turn rough ideas into shippable products and catch its own regressions.
- It is recommended for projects with real users because the failure cost is higher.
- It is strong enough to continue repositories started by Fable 5.
Video evidence
NEW AI Model Tier List for Vibe Coding!
Takeaway: Use Opus 4.8 as the default ship-to-prod coder.
The source video calls it the safest bet for SaaS dashboards, client projects, and real-user apps.
Open source notes