{"name":"tengu_api_unrecognized_model","slug":"tengu-api-unrecognized-model","family":"flag","title":"Feature flags","noun":"feature flag","description":"You get a one-time warning line if a query names a model Claude Code does not recognise.","description_source":"entry","described_by":{"version":"2.1.233","anchor":"warning-when-an-unrecognized-model-is-sent-to-the-api"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.308","builds":0,"mined_builds":149,"first_cited":null},"aliases":[],"entries":[{"version":"2.1.233","anchor":"warning-when-an-unrecognized-model-is-sent-to-the-api","heading":"Warning when an unrecognized model is sent to the API","line":"You get a one-time warning line if a query names a model Claude Code does not recognise.","released_at":"2026-08-14 18:50:44","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":1,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_api_cache_breakpoints","slug":"tengu-api-cache-breakpoints","description":"An analytics event, not a feature flag. Claude Code logs it after placing prompt cache markers on the messages for an API request, with `totalMessageCount`, `cachingEnabled`, `skipCacheWrite`, `forkPointPinned` and `markerCount`; a caller can turn the event off for a given request."},{"name":"tengu_api_no_response_timeout","slug":"tengu-api-no-response-timeout","description":"Hung requests are aborted when headers never arrive, and you can tune the window."},{"name":"tengu_api_query","slug":"tengu-api-query","description":"Query and result telemetry now carry a proactivity level field from your session."},{"name":"tengu_api_subagent_model_not_found","slug":"tengu-api-subagent-model-not-found","description":"A subagent failing on a missing model now tells you exactly which model was sent."},{"name":"tengu_api_success","slug":"tengu-api-success","description":"API success and error telemetry now includes your session's proactivity level."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-api-unrecognized-model","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}