Inworld AI

Inworld AI is a developer platform for building characters that think and speak in real time instead of reading from a dialogue tree. Writers and designers define a character's personality, backstory, knowledge boundaries, goals and emotional profile in Inworld Studio, and the runtime engine handles perception, memory, reasoning and speech while the game is running. Because responses are generated against live game state and the player's own history, the same NPC can react differently to two players who approached it in different ways, which removes the repetition fatigue that large scripted dialogue trees produce. The platform includes low latency text to speech with voice cloning and multilingual support, speech recognition, a pipeline builder for testing LLM, TTS and STT combinations with real time logs, and native SDKs for Unity and Unreal Engine. Pricing is unusually transparent for the category: the agent runtime is free, TTS is billed per million characters, and LLM calls pass through at provider rates across models from Anthropic, OpenAI and open source providers. Ubisoft, NetEase and other major studios have shipped work built on it.