Replacing Claude Opus 4 (retired, except on Google Cloud)?
Already retired — replacement required. Ranked replacement candidates, each shown with exactly what changes if you switch. Same-provider matches surface first because switching cost is lower; capability regressions are flagged in red.
Claude Opus 4 (retired, except on Google Cloud)
| Field | Claude Opus 4 (retired, except on Google Cloud) | → | Claude Fable 5 | Impact |
|---|---|---|---|---|
| Input price | $15/M | → | $10/M | Save 33% |
| Output price | $75/M | → | $50/M | Save 33% |
| Prompt caching | ✓ supported | → | ✓ supported | Preserved |
| Lifecycle | Retired | → | Active | Generally available |
How candidates are ranked
Candidates are ranked by how much of the source model's profile each one preserves — weighing switching cost (same provider or model family surface first), capability parity (what you keep versus what you'd lose), context window, and pricing direction. A candidate that is itself deprecated is pushed down the list; one that's already retired is never recommended.
Ranking is purely algorithmic — no editorial weighting, no paid placement. Every value is pulled from each provider's own documentation; click any model name to see the source-linked detail.