{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/nova-2-sonic/","md":"https://postcutoff.com/m/nova-2-sonic/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":"nova-2-sonic","name":"Amazon Nova 2 Sonic","org":"Amazon","family":"Nova 2","released":"2025-12-02","status":"current","type":"audio/speech","modality_in":["audio","text"],"modality_out":["audio","text"],"open_weights":false,"model_license":"proprietary","context_window":1000000,"max_output":64000,"knowledge_cutoff":null,"pricing":{"speech_input":3,"speech_output":12,"text_input":0.33,"text_output":2.75,"unit":"USD per 1M tokens (speech in/out, text in/out); secondary source, not confirmed on the AWS pricing page","source":"https://www.deeplearning.ai/the-batch/nova-2-family-boosts-cost-effective-performance-adds-new-agentic-features"},"price_line":"$0.33 text in, $2.75 text out per 1M tokens","access":[{"provider":"AWS Bedrock","model_id":"amazon.nova-2-sonic-v1:0","endpoint":"https://bedrock-runtime.{region}.amazonaws.com (InvokeModelWithBidirectionalStream)","docs":"https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-amazon-nova-2-sonic.html"}],"capabilities":[{"name":"Real-time speech-to-speech","detail":"Single model for natural real-time voice conversations over a bidirectional streaming API (no separate ASR/TTS pipeline).","first":false,"discovered":"launch","source":"https://aws.amazon.com/blogs/aws/introducing-amazon-nova-2-sonic-next-generation-speech-to-speech-model-for-conversational-ai/"},{"name":"1M-token session context","detail":"1M-token context window and 64K max output listed for long-running voice sessions.","first":false,"discovered":"launch","source":"https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-amazon-nova-2-sonic.html"},{"name":"Polyglot voices and turn-taking control","detail":"Same voice speaks multiple languages natively (Portuguese and Hindi added vs Nova Sonic); developers set low/medium/high pause sensitivity.","first":false,"discovered":"launch","source":"https://aws.amazon.com/about-aws/whats-new/2025/12/amazon-nova-2-sonic-real-time-conversational-ai"}],"entry":null,"notes":"Technical report (Amazon Nova 2, Dec 2025, https://www.amazon.science/publications/amazon-nova-2-multimodal-reasoning-and-generation-models): Big Bench Audio 87.0 (Artificial Analysis) vs GPT-Realtime (Aug 2025) 83.0 and Gemini 2.5 Flash Live 71.0; BFCL subset 74.5; ComplexFunction 65.2; Common Voice avg WER 6.5 vs 8.4 (GPT-Realtime) across 7 languages; human-preference win rate vs GPT-Realtime above 50% for 6 of 8 voices (e.g. 68.4% Spanish) but 42.4% Hindi and 26.3% Portuguese; vs Gemini 2.5 Flash Live 47.5-77.9%. Comparisons are against 2025 competitors. Successor to Nova Sonic (amazon.nova-sonic-v1:0, Apr 2025). Bedrock only, In-Region in us-east-1, us-west-2, eu-north-1, ap-northeast-1 (no cross-region inference); Standard tier only. Lifecycle Active, EOL no sooner than 2026-12-02. No newer Nova Sonic found as of 2026-09-29; per July 2026 reports Nova 2 Sonic is among the Nova models Amazon keeps developing after its Nova wind-down. Prices from secondary source (AWS Nova pricing page does not list per-token rates).","verified":"2026-09-29","body_md":"Voice agents and conversational IVR on Bedrock.\n\nUse the Bedrock `InvokeModelWithBidirectionalStream` API with model id `amazon.nova-2-sonic-v1:0` (see AWS samples in the model card).\n\nSources: https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-amazon-nova-2-sonic.html · https://cdn.amazon.science/c5/3d/84514a224666b5be6de4b43ef4aa/nova-2-0-technical-report2.pdf","page_url":"https://postcutoff.com/m/nova-2-sonic/","standing":{"kind":"speech and audio","newer_count":76,"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":"nova-2-5-sonic","name":"Amazon Nova 2.5 Sonic","org":"Amazon","released":"2026-10-05","page_url":"https://postcutoff.com/m/nova-2-5-sonic/"},"weights":"closed","licence":"proprietary","licence_permissive":false,"summary":"Closed weights; access is hosted only."}}