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Opus migrationmodels/opus-5/migration-guide

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This page was removed upstream on 23 Sep 2026. Its history is below, and the last text this site read is still at .md on this URL.

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First seen 25 Aug 2026 15:37 UTC

Last changed 23 Sep 2026 18:37 UTC

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23 Sep 26 Opus migration −removed +0−1378 17 Sep 26 Opus migration ±changed +1−1 28 Aug 26 Opus migration ±changed +32−12 26 Aug 26 Opus migration ±changed +2−2 25 Aug 26 Opus migration +new page +1358−0

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Pathmodels/opus-5/migration-guide

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## Migrating to Claude Opus 5 from Claude Opus 4.8
### Update your model name
### Breaking changes
### Recommended changes
### Migration checklist
## Migrating to Claude Opus 5 from Claude Opus 4.7
### What changed
## Migrating to Claude Opus 5 from Claude Opus 4.6 and earlier Opus models
### Choosing an effort level
### Behavior changes
### Migrating from Claude Opus 4.5 or earlier
#### Update your model name