Inworld AI (2026): What Happened to the AI NPC Company, and What It Sells Now
Inworld AI is a company that sells realtime AI voices and AI infrastructure to developers. It was once the best-known name in AI game characters — the “character engine for AI NPCs” that Xbox, Ubisoft and NVIDIA partnered with. In 2025 it retired its Character Studio and rebuilt itself around voice and inference for consumer apps. Games are still one of its markets, but Inworld is no longer the thing you would search for if you want to talk to a character.
So if you remember Inworld as the AI NPC company and are wondering where it went: it didn’t disappear. It changed what it sells, and you can see the change happen, month by month, on its own homepage.
This page is built from Inworld’s own website, blog and documentation, and from the Internet Archive’s copies of its homepage. We have not built anything with Inworld, and nothing here is scored.
Inworld is a trademark of its owner. Arcanum is independent and unaffiliated with Inworld and with every company named here; names are used only to identify the products.
The Short Answers
- What is it? A seller of realtime text-to-speech, speech-to-text, a speech-to-speech API and a language-model router, for developers building consumer apps.
- What happened to it? It changed focus from AI game characters to voice and AI infrastructure between March and September 2025, and retired Character Studio.
- Is it still in games? Yes, as a voice and infrastructure supplier. Its own case study says the AI party game Death by AI runs on it.
- Is it free? There is a free plan for developers. There is no app for players.
- Can I talk to Inworld characters? Only inside someone else’s game or app.
What Happened to Inworld: the Homepage, Year by Year
The clearest record of the change is the title Inworld gave its own homepage. These are the Internet Archive’s copies:
| Archived | Homepage title or headline |
|---|---|
| November 2021 | ”Inworld AI provides a developer platform for creating AI-powered virtual characters to populate immersive realities including the metaverse, VR/AR, games, and virtual worlds.” |
| March 2023 | ”Advanced character behavior & dialogue driven by AI” — with Unreal Engine and Unity SDKs |
| November 2023 | ”The most advanced Character Engine for AI NPCs” |
| May 2024 | ”AI-powered gameplay”, with a new banner: “Inworld’s AI voices are now available in a standalone text-to-speech API” |
| March 2025 | ”AI framework for games and media” |
| April 2025 | ”real-time AI, ready for scaled production” |
| September 2025 | ”AI products for growing applications” |
| May 2026 | ”The #1 Ranked, Most Natural Voice AI” |
| September 2026 | ”Realtime AI for consumer-facing applications” |
Read down the right-hand column and the story tells itself. From 2021 to early 2025 the product is a character. The first sign of the change is May 2024, when Inworld began selling its voices on their own. The word “games” leaves the homepage title between the snapshots of 2 March and 2 April 2025, and it has not come back.
Character Studio was retired
The tool most people knew was Character Studio, a web app where you wrote a character — personality, knowledge, scenes, triggers, a voice — and Inworld hosted it for your game. Inworld’s documentation now has a page titled “Character Studio deprecation,” and it is blunt:
“The legacy Inworld Character Studio has been retired.”
It lists what went with it: “characters, scenes, knowledge, triggers, variables, interactions, integrations, voice studio, custom pronunciations, player profiles.” The archive dates the switch-off: studio.inworld.ai still loaded on 16 June 2025, and by 9 September 2025 it redirected to Inworld’s new developer platform, which is where it points today.
The features did not vanish entirely. Inworld says they moved to its Agent Runtime, where a developer now builds a character in their own engine or backend — knowledge, memory, safety, voice — from parts. The difference is who holds the character. Studio hosted it for you. Runtime gives you the pieces and the character lives in your code.
Inworld’s own explanation
Inworld explained the change in an October 2025 post titled “The new AI infrastructure for scaling games, media, and characters.” It says it “began by pushing the frontier of lifelike, interactive characters for games and entertainment, and this remains a core focus area.” Then it describes the problem it ran into:
“As partners moved from impressive demos to live titles, we hit the same wall every game team hits: keeping voice, timing, and consistency flawless at scale, which is what players actually feel.”
And it speaks directly to former users: “If you knew us for our previous character stack, you will find this generation faster to ship, safer to iterate, and easier to scale.”
A January 2026 post goes further and names the new target. It argues that “the next wave” of AI is consumer apps — “Language learning apps, AI companions, fitness coaches, creative tools” — and that they have to be “realtime, scalable, and personal.” Games are one entry on that list, not the whole of it.
What Inworld Sells Now
Inworld’s homepage today describes the company as “a research lab and inference provider for realtime AI at consumer scale. First-party TTS and STT models, the LLMs you choose, and the inference underneath.” In plain terms, four products:
- Realtime TTS (text-to-speech). Its main product. The current model is Realtime TTS-2, launched on 31 August 2026, with a faster TTS-2 Flash. Inworld claims under 100 milliseconds to the first audio for TTS-2 and 25 milliseconds for Flash. You can steer the delivery with bracketed instructions written in plain English — its launch post’s example is
[speak sadly, as if something bad just happened]— and add sounds like[sigh]or[laugh]. A custom voice can be cloned from 15 seconds of audio, or designed from a written description. - Realtime STT (speech-to-text). Turns speech into text, and — on its games page — also reports how the player sounds: emotion, pace, pitch and vocal style, each with a confidence score.
- Realtime API. Speech in, speech out, over one connection, with turn-taking, interruptions and function calling. This is the part closest to a talking character.
- Realtime Router. One API that sends each request to one of “OpenAI, Anthropic, Google, and 220+ models,” with “zero markup” — you pay the model provider’s rate and nothing more.
Inworld also sells dedicated GPUs, from $5 per GPU-hour on its homepage.
On languages, Inworld’s pages disagree with each other: the homepage says TTS-2 speaks “200+ languages,” while the TTS-2 launch post says it “holds one voice identity across over 100 languages.” Treat 100 as the safe number until the two agree.
Inworld’s claims of being “#1” refer to the Artificial Analysis speech leaderboard, which it links from its site. We have not checked that ranking ourselves.
Inworld AI Pricing
From Inworld’s pricing page, checked 27 September 2026. Prices are per million characters of text for TTS and per hour of audio for STT; the monthly fee is paid as credits you spend on usage.
| Plan | Monthly | TTS-2 | TTS-2 Flash | STT 1 | Notable limits |
|---|---|---|---|---|---|
| On-Demand | Free | $25 / 1M chars | $15 / 1M chars | $0.15 / hr | ”Up to 70 min TTS included,” 100 custom voices |
| Creator | $25 | $20 | $10 | $0.10 | $25 credits, 500 custom voices |
| Builder | $100 | $17.50 | $9 | $0.10 | $100 credits, 3,000 custom voices |
| Developer | $300 | $15 | $8 | $0.10 | $300 credits, 10,000 custom voices |
| Growth | $1,500 | $12.50 | $7 | $0.10 | $1,500 credits, 30,000 custom voices |
| Enterprise | Custom | ”As low as $5/1M" | "Sub-$5/1M” | Custom | Custom limits |
Language models reached through the Router are billed “at cost” on every plan. Unused subscription credits roll over for up to three months while you stay on an equal or higher paid plan.
What that means in practice. A million characters is roughly a long novel read aloud. For a player-facing game that voices every line, the voice bill grows with every sentence the AI writes, which is why Inworld’s June 2026 pricing post is built around one idea: “on a flat rate your bill climbs in lockstep with engagement.”
Where Players Still Meet Inworld
Inworld does not run an app for players. There is no Inworld chat you can open tonight. You meet it inside other people’s products, and mostly you hear it.
Death by AI. Inworld’s own case study says the Discord party game — in which an AI game master named Bob puts you in a deadly situation and judges whether your plan survives — reached “10 million players” in its first month and 20 million three months later. Its studio launched on OpenAI and ElevenLabs, found the cost unsustainable within days, and moved to Inworld. The studio’s CEO is quoted: “We found a path to profitability with Inworld.”
Status. Inworld says Wishroll’s app Status “reached 1M users in 19 days” on its platform.
AI RPGs we cover. Inworld’s homepage and its TTS-2 launch post quote the heads of two platforms on our benchmark, praising its new voice model. Louis Muk, CEO of Isekai Zero: “When your character speaks and you forget it’s AI, that’s when the story becomes real.” Nick Walton, CEO of Latitude, which makes AI Dungeon and Voyage: “AI Native games need characters you can deeply connect with.” Neither quote says which features use Inworld, so we don’t claim more than that.
Demos and partnerships. In its October 2025 post Inworld lists the partners it has worked with in games: a “multi-year co-development” with Xbox; Ubisoft’s NEO NPC prototype, “powered by Inworld tech”; NVIDIA’s Covert Protocol demo, built “using NVIDIA ACE with Inworld”; Niantic; and a streaming assistant for Streamlabs, “jointly powered by Streamlabs, NVIDIA ACE, and Inworld generative AI.” These were demos and prototypes, not games you could buy. For how NVIDIA’s own character toolkit changed over the same years, see our guide to NVIDIA ACE.
Not in SillyTavern. If you run SillyTavern and want Inworld’s voices, there is no built-in Inworld option: its text-to-speech extension, checked 27 September 2026, ships providers such as ElevenLabs, OpenAI, Kokoro and XTTS, but not Inworld.
What the Change Tells You About AI Characters
Inworld’s story is the history of AI game characters in miniature. In 2023 the promise was a hosted character you could drop into any game. By 2025 the company that sold that promise was telling developers to build characters themselves, from parts, in their own code — and selling the parts.
That matches what the rest of the field found. KRAFTON built PUBG’s AI teammate so that “tool results are the only ground truth,” with the game engine, not the model, holding the facts. The research on AI game masters keeps landing in the same place: keep the game’s state outside the model, and let the model do the talking. A character hosted on someone else’s server, with its knowledge in a separate studio app, sits far from the game’s real state. A character built inside the engine sits right next to it.
Not everyone made the same move. Convai, which co-built NVIDIA’s first ACE demo, still sells hosted characters with engine plugins — though its homepage now lists brand marketing and training ahead of games.
It also explains why voice is the part that survived as a business. Voice is a clean piece: text in, audio out, easy to price and easy to swap. The character — its memory, its knowledge of the world, what it is allowed to do — turned out to belong to the game.
If You Want AI Characters to Play With Now
- Games with a few AI characters inside them: our list of games with AI NPCs you can talk to covers every title we could verify, from Where Winds Meet to Suck Up!.
- Mods for games you already own: Mantella, CHIM and SkyrimNet put AI conversation into Skyrim.
- Voice in AI roleplay: our guide to AI roleplay with voice covers which platforms read the story aloud and which let you talk back.
- A whole game built this way: that is an AI RPG. Our benchmark scores 27 of them on seven axes, from first-hand play.
Frequently Asked Questions
What is Inworld AI? Inworld AI is a company that sells AI models and infrastructure to developers: realtime text-to-speech, speech-to-text, a speech-to-speech API, and a router that sends requests to more than 220 language models. It describes itself as a research lab and inference provider for realtime AI at consumer scale. It started as a platform for AI game characters, and games are now one of several markets it serves.
What happened to Inworld AI? Inworld changed what it sells. Until early 2025 its website presented it as a character engine for AI NPCs in games. Between March and April 2025 it began describing itself as real-time AI for scaled production, and by September 2025 its Character Studio web app redirected to a new developer platform. Inworld’s documentation says the legacy Character Studio has been retired and that its features moved to the Inworld Agent Runtime.
Is Inworld AI still used for games? Yes, but as a supplier of voices and infrastructure rather than as a character engine. Its games page offers text-to-speech for characters, speech-to-text that detects how a player sounds, a speech-to-speech API for live dialogue, and routing between language models. The AI game Death by AI moved to Inworld after launch, according to Inworld’s own case study.
Is Inworld AI free? Inworld has a free On-Demand plan for evaluation and prototyping, which its pricing page says includes up to 70 minutes of text-to-speech, voice cloning and access to its APIs, with usage billed per character or per hour after that. Paid plans start at 25 dollars a month. Inworld sells to developers, so there is no free app for players to chat with characters.
How much does Inworld TTS cost? On Inworld’s pricing page, checked 27 September 2026, TTS-2 costs 25 dollars per million characters on the free On-Demand plan and falls to 12.50 dollars on the 1,500-dollar-a-month Growth plan. TTS-2 Flash costs 15 dollars per million characters, falling to 7 dollars. Enterprise prices are custom, from as low as 5 dollars per million characters.
Can I chat with Inworld characters? Not directly. Inworld does not run a character chat app for players. It sells APIs to the companies that build games and apps, so you meet Inworld inside someone else’s product, usually as a voice. If you want AI characters to play with now, look at AI RPGs and games with AI NPCs instead.
Sources
Checked 27 September 2026. Inworld: homepage; pricing; games page; Character Studio deprecation; blog posts “The new AI infrastructure for scaling games, media, and characters” (15 October 2025), “The next wave of AI applications” (16 January 2026), consumer AI pricing (10 June 2026), Realtime TTS-2 (31 August 2026) and the Death by AI case study. Homepage history and the Character Studio redirect: Internet Archive captures of inworld.ai (November 2021 to September 2026) and studio.inworld.ai (16 June and 9 September 2025). SillyTavern: the text-to-speech extension folder on its release branch.