SillyTavern review

What SillyTavern is

SillyTavern is free, open-source software for chatting and roleplaying with large language models. It describes itself on GitHub as an “LLM Frontend for Power Users”, and that is an accurate summary: it is an interface, not a service. There is no company behind it, no account to create, no subscription and no model of its own. You download it, run it on your own computer, server or Android phone, and point it at a model, either one running locally or a hosted API such as OpenRouter, DeepSeek, Anthropic, OpenAI or Google. The code is licensed under AGPL-3.0, the project started in February 2023 as a fork of TavernAI, and its documentation says it “will always be free and open-sourced”. In October 2026 the repository showed about 34,000 stars and 6,400 forks, and the current release was 1.19.0, published on 14 September 2026. That makes SillyTavern the odd one out in this directory: it is the tool many hosted roleplay platforms are effectively competing against, and its quality depends almost entirely on choices you make.

The SillyTavern repository on GitHub, distributed free under the AGPL-3.0 licence, October 2026.

Chat and roleplay

The chat screen is built around character cards: a name, description, personality, scenario, first message and example dialogue, stored as a PNG image with the data embedded. Cards made for other services can be imported, which is why SillyTavern sits at the end of a large community pipeline of card sites. Around the card you set a persona for yourself, an author’s note that is injected near the end of the prompt, and a system prompt or instruct template that controls how the model is addressed. Group chats put several characters in one scene with rules for who speaks next. Swipes let you generate alternative replies and, since version 1.17, a swipe picker lets you browse, branch from and delete them. You can edit any message, continue a reply, impersonate your own side and branch a chat into a new file at any point.

Because there is no platform filter, how a character writes, and what it will write, is decided by the model you connect and the presets you load. With a strong hosted model and a good preset the prose can beat anything in the hosted apps; with a small local model on modest hardware it can be repetitive and forgetful. Community presets on Reddit and Discord do much of the tuning work, and choosing one is most of the learning curve.

Memory

Memory is SillyTavern’s strongest area and the reason its memory sub-score sits near the top of the directory. It offers several tools that work together:

• World Info, also called lorebooks: entries that are inserted into the prompt only when a keyword appears, so a large setting or a long relationship history can be kept outside the context until it is needed. Version 1.19 added configurable sorting and made renamed lorebooks keep their links to chats, characters and personas.

• Summarize: an extension that periodically condenses the chat so far into a running summary placed in the prompt.

• Vector Storage: chat messages are embedded and the most relevant older ones are retrieved by meaning rather than by keyword.

• Data Bank: documents and notes attached to a character or chat, retrieved the same way, which the documentation calls built-in RAG support.

None of this is automatic in the way Kindroid or Nomi handle memory. You decide what goes into a lorebook, how often the summary runs and how many tokens each tool may use. The real ceiling is the context window of your model: hosted models in late 2026 commonly accept hundreds of thousands of tokens, while a local model on a 6 to 12 GB graphics card usually works with far less, so the same chat can feel very different depending on the back end. Done well, SillyTavern can hold a months-long story together better than any hosted app; done carelessly, it forgets like any other.

Models and technology

SillyTavern is a Node.js application that runs a small local web server and opens in your browser; it needs Node.js 20 or later since version 1.17. It talks to two kinds of back end. Chat Completion sources include OpenAI, Claude, Google AI Studio and Vertex, Mistral, DeepSeek, OpenRouter, NovelAI, Cohere, Perplexity, Pollinations, NanoGPT, Fireworks, Chutes and any OpenAI-compatible endpoint. Text Completion sources cover local engines such as KoboldCpp, llama.cpp, Ollama, Oobabooga and TabbyAPI, plus AI Horde, a volunteer network that is free but slow when demand is high. Version 1.19 added support for the newest Claude, GPT, Gemini Flash, GLM and DeepSeek models.

The documentation is frank about the trade-off. Paid web services are easy to set up and give the best writing, but they cost money and, in its words, “everything is logged on their server”. Self-hosted models give “total privacy” and cost nothing per message, but need “a GPU with at least 6GB VRAM” and write less well than the state of the art. Sampler settings, reasoning effort, prompt caching and tokenizer choice are all exposed, which is the appeal for enthusiasts and the obstacle for everyone else.

The SillyTavern documentation page listing supported Chat Completion and Text Completion back ends, October 2026.

Images, video and voice

Media comes through extensions that call services you configure. Image generation can use a local Stable Diffusion or ComfyUI install, or hosted APIs such as NovelAI, Pollinations, OpenAI or Black Forest Labs, and can produce a picture of the character or the current scene from the chat. Image captioning lets vision models describe pictures you send. Text-to-speech works with local engines and hosted voices from providers including OpenAI, ElevenLabs and Google, and speech recognition can take your voice as input. Character Expressions swaps a sprite to match the mood of each reply. There is no video generation and no live voice calling in the hosted-app sense, and quality depends on what you connect. That is why media is SillyTavern’s weakest sub-score.

Beyond chat: what else it does

• STscript, a built-in scripting language, and Quick Replies, which turn scripts into buttons.

• A macro system, rebuilt as Macros 2.0 from version 1.15, for variables and dynamic prompt text.

• Web search, translation and tool calling for models that support it.

• Multi-user mode with separate, password-protected profiles on one install.

• Themes, custom CSS, backgrounds and a large catalogue of third-party extensions.

Third-party extensions run with real access to your install, and that has consequences, as the safety section explains.

The free tier, honestly

The software is completely free, with no paid tier, adverts or feature locks. Whether using it costs anything depends on the model. A local model is free per message once you own suitable hardware. AI Horde is free and volunteer-run. OpenRouter lists a rotating set of free models, limited to 50 requests a day, or 1,000 a day once you have bought at least $10 of credit; Google AI Studio and Mistral also have rate-limited free tiers. Free routes work, but the best roleplay models are paid, and most regular users end up spending something with a provider. The point is that you choose the spend and can see it per message.

Platforms and apps

SillyTavern runs on Windows, macOS and Linux, through Docker, and on Android through Termux, although the project says Termux installs are not officially supported. There is no iOS app and no app in either store; iPhone and iPad users reach an install on another machine through the browser. The Windows guide asks you to install Node.js and Git, clone the release branch into a folder Windows does not protect, and run Start.bat, never as administrator. Using it away from home means a VPN, a tunnel such as Tailscale or a reverse proxy, and the documentation warns in capitals never to put an instance on the open internet without proper security. Any website or app offering “SillyTavern online” is a third party, not the project.

The official SillyTavern documentation home page, which describes it as a locally installed user interface, October 2026.

Support, cancellation and refunds

There is no support desk. Help comes from the documentation, GitHub issues, the official Discord and the r/SillyTavernAI subreddit, where volunteers are active and answers are usually quick. There is nothing to cancel and nothing to refund, because nothing is sold. Any billing, refund or account question belongs to your model provider: OpenRouter credits, a DeepSeek top-up or an Anthropic or OpenAI API account each follow that company’s own terms. Updating is done by pulling the latest release with Git or the bundled updater, and the maintainers ask users to stay current for security reasons.

Who it is for

SillyTavern is for technically comfortable adults who want full control over the model, the memory and the cost of long-form text roleplay, and who are willing to spend an evening installing and tuning it. It rewards people who already know they want a particular model, care where their chats are stored, or want to run everything offline. It is the wrong choice for anyone who wants a phone app with a login, live calls, image and video generation that works out of the box, or someone to email when something breaks. For a hosted experience with strong memory, Kindroid is the closest match; for a large card library without installing anything, Janitor AI and Chub AI are the obvious alternatives.

Research basis: desk research from the official site, help centre, terms and public user reports, October 2026.