Prompt caching always on for new dedicated endpoints; disable_prompt_cache deprecated

Prompt caching is now automatically enabled for all newly created dedicated endpoints. This change improves performance and reduces costs by default.

What's changing:

• The disable_prompt_cache field (API), --no-prompt-cache flag (CLI), and related SDK parameters are now deprecated.
• Prompt caching will always be enabled. The field is accepted but ignored after deprecation.

Timeline:

• Now: Field is deprecated. Setting it has no effect (prompt caching is always on).
• February 2026: Field will be removed.

Action required:

• --no-prompt-cache in CLI commands has no effect. You can remove it.
• disable_prompt_cache from API requests has no effect. You can remove it.
• SDK calls that set this parameter have no effect. You can remove it.

No changes are required for existing endpoints. This only affects endpoint creation.