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5 posts about Migration from Simon Carter.
Anthropic has formally deprecated claude-mythos-preview with a June 30 2026 retirement date, directing developers to migrate to claude-mythos-5 — which is currently suspended.
The legacy Gemini Interactions API outputs schema was permanently removed on June 8, 2026. Here's what changed, what's broken, and how to migrate.
Anthropic has deprecated claude-opus-4-1-20250805 with a retirement date of August 5, 2026. Opus 4.8 is the recommended replacement.
Anthropic retires claude-sonnet-4-20250514 and claude-opus-4-20250514 from the API on June 15, 2026. Pinned version strings will error. Here's how to migrate.
Google's Gemini Interactions API replaces the flat outputs array with a structured steps timeline. The legacy schema is permanently removed on June 8.