Skip to main content
Inworld’s platform provides access to a wide variety of state-of-the-art models. These models offer diverse capabilities, performance levels, price points, and deployment options, enabling users to select and customize models that best match their specific use cases and application needs.

​
Overview of Model Offerings

This section provides some high-level context on Inworld’s model offerings, and how they can be used in your application.
  • TTS: Text-to-Speech models can be used to generate high-quality audio for your application, such as powering a character’s voice.
  • LLM: Large Language Models are powerful models that can intake inputs (typically text, but certain models may also support other modalities) and generate text outputs. These models can be used to determine in-game actions, power conversations, generate dynamic narratives, and more.
  • Embeddings: Embeddings models convert text into high-dimensional vectors, which can be used to power intent detection, text similarity comparison, and retrieval-augmented generation (RAG).

​
TTS

Inworld’s Agent Runtime and API offer access to Inworld’s family of state-of-the-art TTS models, optimized for different use cases, quality levels, and performance requirements.

Realtime TTS-2

​
Our flagship, top-ranked model — the best quality plus steerability

  • Natural language steering for more contextually aware speech
  • Support for 200+ languages and locales
  • Optimized for real-time use
  • High quality instant voice cloning
  • Enhanced timestamps with phonetic details and visemes

Realtime TTS 1.5 Max

​
Rich, expressive speech with maximum stability

  • Support for 15 languages
  • Optimized for real-time use (<200ms median latency)
  • High quality instant voice cloning

Realtime TTS 1.5 Mini

​
Our ultra-fast model — for when latency is the top priority

  • Ultra-low latency (~120ms median latency)
  • Support for 15 languages
  • High quality instant voice cloning

​
Models overview

Looking for inworld-tts-1 or inworld-tts-1-max? These previous-generation models were discontinued on June 15, 2026. Requests to them are now automatically routed to their 1.5 successors (inworld-tts-1 → inworld-tts-1.5-mini, inworld-tts-1-max → inworld-tts-1.5-max). We recommend migrating to inworld-tts-2 to improve quality and latency.

​
LLM

​
Chat Completion

Inworld provides access to hundreds of LLMs from various providers through a unified Chat Completions API.
  • Available models: See the List Models API or the Models page in the Inworld Portal for the full list of supported models and providers
  • Pricing: Visit inworld.ai/pricing for model pricing details
  • Specific model: Call a model directly using the provider/model format (e.g., openai/gpt-5)
  • Auto-select: Set model to "auto" to automatically pick the best model based on price, latency, or performance
  • Router: Create a router for conditional routing, A/B testing, and reusable configurations, then reference it via the model field (e.g., my-router)

​
Embeddings

​
Terms of Service

You may not violate the terms of service or policies of third-party model providers using Inworld’s platform or your account will be subject to deactivation.