{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-05-20-elevenlabs-speech-engine/","md":"https://postcutoff.com/e/2026-05-20-elevenlabs-speech-engine/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":"2026-05-20-elevenlabs-speech-engine","date":"2026-05-20","date_precision":"day","short_title":"ElevenLabs launches Speech Engine","deck":"Bring-your-own-LLM voice layer for existing chat agents","takeaway":"On 2026-05-20 ElevenLabs introduced Speech Engine, an API and SDK that turns an existing text chat agent into a voice agent.","category":"product","category_label":"Products","importance":2,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":[{"n":1,"title":"ElevenLabs on X: Introducing Speech Engine","url":"https://x.com/ElevenLabs/status/2057155693623361667","type":"official","group":"primary","domain":"x.com"},{"n":2,"title":"ElevenLabs docs: Speech Engine","url":"https://elevenlabs.io/docs/overview/capabilities/speech-engine","type":"docs","group":"primary","domain":"elevenlabs.io"},{"n":3,"title":"ElevenLabs: Turn your chat agent into a voice agent","url":"https://elevenlabs.io/speech-engine","type":"official","group":"primary","domain":"elevenlabs.io"},{"n":4,"title":"ElevenLabs API pricing","url":"https://elevenlabs.io/pricing/api","type":"official","group":"primary","domain":"elevenlabs.io"},{"n":5,"title":"AlternativeTo: ElevenLabs launches Speech Engine","url":"https://alternativeto.net/news/2026/5/elevenlabs-launches-speech-engine-for-instant-voice-integration-in-chat-agents/","type":"press","group":"press","domain":"alternativeto.net"}],"official":4,"filed":"2026-09-29","updated":"2026-09-29","orgs":["ElevenLabs"],"title":"ElevenLabs launches Speech Engine: bring-your-own-LLM voice layer for existing chat agents","summary":"On 2026-05-20 ElevenLabs introduced Speech Engine, an API and SDK that turns an existing text chat agent into a voice agent. ElevenLabs handles transcription, TTS, turn-taking and interruption, while the developer's own server and LLM keep the conversation logic.","key_facts":["Announced on X 2026-05-20: 'turn their existing chat agent into a full voice agent with one prompt'","Combines ElevenLabs speech, transcription and voice-orchestration models in one pipeline; works with any LLM (OpenAI, Anthropic, Gemini, ...)","WebSocket-based; JavaScript and Python SDKs manage connection lifecycle, turn-taking and interruption cancellation","70+ languages; SOC 2, HIPAA, GDPR, EU data residency, zero-retention mode (AlternativeTo summary)","Pricing page lists burst pricing of $0.16/min; the standard per-minute rate ($0.08) is from a lead, not confirmed in our fetch","2026-09-21 changelog: new cascade_timeout_seconds parameter (2-15 s, default 4)"],"key_numbers":[],"tags":["elevenlabs","voice-agents","speech-to-text","text-to-speech","api"],"science":null,"body_md":"## What happened\n\nElevenLabs split its voice-agent stack. ElevenAgents is the full hosted platform, and Speech Engine is a thin voice layer for teams that already have a text agent and want to keep their own LLM and logic.\n\n## Why it matters\n\nIt is the cascaded (\"STT -> your LLM -> TTS\") answer to end-to-end speech-to-speech models from OpenAI, Google and xAI. Developers keep full control of the model and tools and get ElevenLabs voices and turn-taking.","disputed":[],"related":[{"id":"2026-09-16-elevenlabs-reception","url":"https://postcutoff.com/e/2026-09-16-elevenlabs-reception/","date":"2026-09-16","date_precision":"day","short_title":"ElevenLabs launches Reception, an AI phone receptionist for small businesses built on ElevenAgents","deck":null,"takeaway":"Voice agents went from developer platforms to small-business subscriptions.","category":"product","category_label":"Products","importance":2,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":5,"official":4,"filed":"2026-09-29","updated":"2026-09-29","orgs":["ElevenLabs"]}],"people":[],"posts":[{"id":"x-elevenlabs-2057155693623361667","title":"“Introducing Speech Engine. Developers can now turn their existing chat agent into a full…”","url":"https://postcutoff.com/p/x-elevenlabs-2057155693623361667/"}],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":20,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":50,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":null}