Claude Fable 5 requires 30-day data retention on the Claude API, with no zero data retention availability.

If zero data retention is mandatory, this model is out of scope for API use.

Data retention is model-specific here, so builders need retention checks before selecting Claude Fable 5 on the API.

• Jul 26, 2026OpenAI updated GPT-5.5 Instant to improve conversational quality in decision, advice, planning, research, and shopping tasks.
• Jul 25, 2026Enterprise and Edu users can find skills under Plugins, on the Skills tab in the Plugin Directory.
• Jul 25, 2026Anthropic removed modelcard language for Claude Fable 5 and Claude Mythos 5.

This is the world we build in. It moves this fast. We move with it.