Inworld AI

Inworld AI builds models and inference for consumer applications: realtime text to speech, speech to text and speech to speech, and open LLMs served on a fleet we operate. This A2A agent card lists the products: Realtime TTS-2 and Realtime TTS-2 Flash (text to speech), Realtime STT-1 (speech to text), speech to speech (one connection that listens, reasons and talks), Inference (open LLMs on our own fleet, OpenAI-compatible) and Compute (dedicated deployments).

Skills

• Realtime TTS-2 (text to speech)
  Realtime TTS-2 speaks about 500 languages and dialects, takes voice direction in plain words in the request's instruction field, and uses the conversation so far as context. Realtime TTS-2 Flash covers fewer languages and is the fastest model in the family. Streaming over HTTP and WebSocket, word and character timestamps, viseme timings for lip-sync, 275 library voices, instant voice cloning from 3 seconds of audio and voice design from a written description. Model IDs: inworld-tts-2, inworld-tts-2-flash.
• Realtime STT-1 (speech to text)
  Realtime STT-1 transcribes 30 languages and returns a voice profile with each transcript (age, emotion, pitch, vocal style, accent). Synchronous, WebSocket streaming and async jobs, with speaker diarization (experimental), word timestamps and contextual prompts. Model ID: inworld/inworld-stt-1.
• Speech to speech
  One connection that listens, reasons and talks, over WebSocket or WebRTC. It follows the OpenAI Realtime protocol, with turn detection, interruptions and tool calling inside the session, any Realtime TTS-2 voice and the LLM you choose in session.model (for example inworld/models/gemma-4-31b-it). Its API reference is the Realtime API.
• Inference
  Open LLMs served on a fleet we operate, through an OpenAI-compatible chat completions API. We optimize each model from the weights to the kernels on real traffic, in four regions: the US, Europe, India and Asia Pacific. Hosted model IDs include gemma-4-31b-it, gemma-4-26b-a4b-it, GLM-5.3-Flash, mimo-v2.6-pro and deepseek-v4.1-flash.
• Compute
  Dedicated deployments: capacity reserved for your traffic with your own model ID, your own weights or a fine-tuned open model, in the US, Europe, India or Asia Pacific. Called through the same chat completions API.

How to call

https://api.inworld.ai

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