{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/cartesia-ink-2/","md":"https://postcutoff.com/m/cartesia-ink-2/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"cartesia-ink-2","name":"Cartesia Ink-2 (streaming STT)","org":"Cartesia","family":"Ink","released":"2026-07-09","status":"current","type":"audio/speech","modality_in":["audio"],"modality_out":["text"],"open_weights":false,"model_license":"proprietary","context_window":null,"max_output":null,"knowledge_cutoff":null,"pricing":null,"price_line":"Price not published","access":[{"provider":"Cartesia API","model_id":"ink-2","endpoint":"wss://api.cartesia.ai/stt/websocket?model=ink-2","docs":"https://docs.cartesia.ai/build-with-cartesia/stt/latest"},{"provider":"Cartesia API (beta)","model_id":"ink-preview","endpoint":"wss://api.cartesia.ai/stt/websocket"}],"capabilities":[{"name":"Built-in semantic turn detection","detail":"Emits turn.start / turn.update / turn.eager_end / turn.resume / turn.end events so agents need no separate VAD; 89% precision, 93% F1 on endpointing; ~0.1 s time-to-final-transcript.","first":false,"discovered":"launch","source":"https://www.cartesia.ai/blog/introducing-ink-2"},{"name":"#1 streaming WER on Artificial Analysis at launch","detail":"3.4% WER on AA-AgentTalk, ranked #1 on Artificial Analysis's streaming STT leaderboard (company claim, July 2026).","first":false,"discovered":"launch","source":"https://www.cartesia.ai/blog/introducing-ink-2"},{"name":"Keyterm prompting","detail":"Keyterm prompting and configurable turn detection added 2026-08-11.","first":false,"discovered":"later","source":"https://www.cartesia.ai/blog"}],"entry":null,"notes":"Launched English-only (blog 2026-07-09); the current stable `ink-2` snapshot is dated 2026-09-17 and supports English, French, Hindi, Japanese, Spanish. Some press dates an earlier Ink 2 release to May 2026 (unverified). Query params: model, encoding, sample_rate, cartesia_version=2026-08-14; send `finalize` when user stops. Older model: ink-whisper (1 credit/s streaming). Ink-2 credit price not found on pricing page (plans list included STT hours).","verified":"2026-09-29","body_md":"Cartesia's streaming speech-to-text built for voice agents; pairs with Sonic-3.6.\n\nSources: https://docs.cartesia.ai/build-with-cartesia/stt/latest , https://docs.cartesia.ai/api-reference/stt/stt , https://www.cartesia.ai/blog/introducing-ink-2","page_url":"https://postcutoff.com/m/cartesia-ink-2/","standing":{"kind":"speech and audio","newer_count":44,"newer":[{"id":"nemotron-3-5-transcribe","name":"NVIDIA Nemotron 3.5 Transcribe (30B-A4B)","org":"NVIDIA","released":"2026-10-28","page_url":"https://postcutoff.com/m/nemotron-3-5-transcribe/"},{"id":"hy-simulmt-30b-a3b","name":"Hy-SimulMT-30B-A3B","org":"Tencent","released":"2026-10-22","page_url":"https://postcutoff.com/m/hy-simulmt-30b-a3b/"},{"id":"eleven-realtime-v1-max","name":"Eleven Realtime v1 Max / Mini","org":"ElevenLabs","released":"2026-10-20","page_url":"https://postcutoff.com/m/eleven-realtime-v1-max/"},{"id":"voxtral-mini-transcribe-3","name":"Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)","org":"Mistral AI","released":"2026-10-20","page_url":"https://postcutoff.com/m/voxtral-mini-transcribe-3/"},{"id":"voxtral-small-transcribe-3","name":"Voxtral Small Transcribe 3","org":"Mistral AI","released":"2026-10-20","page_url":"https://postcutoff.com/m/voxtral-small-transcribe-3/"}],"before":null,"after":{"id":"cartesia-sonic-3-6","name":"Cartesia Sonic-3.6","org":"Cartesia","released":"2026-08-27","page_url":"https://postcutoff.com/m/cartesia-sonic-3-6/"},"weights":"closed","licence":"proprietary","licence_permissive":false,"summary":"Closed weights; access is hosted only."}}