As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/m/nova-2-sonic/

# Amazon Nova 2 Sonic

Amazon, Nova 2 family. Status: current. Type: speech and audio. Released: 2025-12-02.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| AWS Bedrock | `amazon.nova-2-sonic-v1:0` | https://bedrock-runtime.{region}.amazonaws.com (InvokeModelWithBidirectionalStream) | https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-amazon-nova-2-sonic.html |

## Pricing

- Speech input: $3 per 1M tokens
- Speech output: $12 per 1M tokens
- Text input: $0.33 per 1M tokens
- Text output: $2.75 per 1M tokens
- Unit as published: 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
- Last checked: 2026-09-29

## Specs

- Input: audio, text
- Output: audio, text
- Context window: 1,000,000 tokens
- Max output: 64,000 tokens
- Open weights: no
- Licence: proprietary

## Where it stands

- Newer speech and audio models in the registry since its release: 76. The 5 newest:
  - NVIDIA Nemotron 3.5 Transcribe (30B-A4B) (2026-10-28) https://postcutoff.com/m/nemotron-3-5-transcribe/
  - Hy-SimulMT-30B-A3B (2026-10-22) https://postcutoff.com/m/hy-simulmt-30b-a3b/
  - Eleven Realtime v1 Max / Mini (2026-10-20) https://postcutoff.com/m/eleven-realtime-v1-max/
  - Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3) (2026-10-20) https://postcutoff.com/m/voxtral-mini-transcribe-3/
  - Voxtral Small Transcribe 3 (2026-10-20) https://postcutoff.com/m/voxtral-small-transcribe-3/
- After it from Amazon: Amazon Nova 2.5 Sonic (2026-10-05) https://postcutoff.com/m/nova-2-5-sonic/
- Closed weights; access is hosted only.

## What stands out

- Real-time speech-to-speech: Single model for natural real-time voice conversations over a bidirectional streaming API (no separate ASR/TTS pipeline). Source: https://aws.amazon.com/blogs/aws/introducing-amazon-nova-2-sonic-next-generation-speech-to-speech-model-for-conversational-ai/
- 1M-token session context: 1M-token context window and 64K max output listed for long-running voice sessions. Source: https://docs.aws.amazon.com/bedrock/latest/userguide/model-card-amazon-nova-2-sonic.html
- Polyglot voices and turn-taking control: Same voice speaks multiple languages natively (Portuguese and Hindi added vs Nova Sonic); developers set low/medium/high pause sensitivity. Source: https://aws.amazon.com/about-aws/whats-new/2025/12/amazon-nova-2-sonic-real-time-conversational-ai

## 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).

Voice agents and conversational IVR on Bedrock.

Use the Bedrock `InvokeModelWithBidirectionalStream` API with model id `amazon.nova-2-sonic-v1:0` (see AWS samples in the model card).

Sources: 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

Model page: https://postcutoff.com/m/nova-2-sonic/