Roleplay & chat frontends

SillyTavern

Power-user roleplay frontend with deep prompt control.

SillyTavern uses its own Connection Profile system. Switch the API to Chat Completion with `Custom (OpenAI-compatible)` and SillyTavern will handle streaming and presets.

Base URL https://api.freetheai.xyz/v1
Recommended models rev/claude-sonnet-4.5
Chat completions Messages Streaming Tool calling
Get a free key Official docs GitHub repo
Step by step

Connect SillyTavern to FreeTheAi.

  1. 1

    Open the API panel

    Click the plug icon in SillyTavern, the first icon in the right toolbar.

  2. 2

    Pick the right API

    Set `API` to `Chat Completion`. Set `Chat Completion Source` to `Custom (OpenAI-compatible)`.

  3. 3

    Fill the endpoint and key

    Use the FreeTheAi base URL and the key from /signup. SillyTavern auto-appends /chat/completions, so do not add it manually.

    text 
    Custom Endpoint (Base URL): https://api.freetheai.xyz/v1
Custom API Key: PASTE_YOUR_FREETHEAI_KEY
  4. 4

    Pick a model

    Type or paste a FreeTheAi alias into `Enter a Model ID`. The dropdown will populate after the first connect.

    text 
    rev/claude-sonnet-4.5
  5. 5

    Save the profile

    Save the Connection Profile so SillyTavern remembers FreeTheAi between sessions.

Recommended aliases

Models that pair well with SillyTavern.

  • rev/claude-sonnet-4.5
  • bbl/gpt-5.4-mini
  • glm/glm-5.1

See the full live catalog at /models. Aliases are stable; pricing on the free tier stays $0.

Heads up

Common gotchas.

  • If a Test Message returns 404, append `/v1` to the endpoint. Never add `/chat/completions`.
  • Use Strict Prompt Post-Processing for Claude-style models so SillyTavern alternates user and assistant correctly.
  • FreeTheAi is rate-limited per minute. Lower SillyTavern's parallel generation if you see frequent 429s.
Where to next

Keep building.

All setup guides Quickstart Cross-compatibility docs Model catalog Ask in Discord