Laravel AI SDK 1.0, released September 23, 2026, replaces the `tool_calls` and `tool_results` columns with one `steps` column. Without your own migration, the first stored message fails with "table
Token usage fields are renamed to `inputTokens` and `outputTokens`, and old rows keep the old JSON keys, so dashboards that read the column will see two shapes.
Default models changed between 0.11.2, 1.0.1 and 1.2.2. If `config/ai.php` sets no model, a `composer update` changes which model answers your users.