SynapseX Chat overview
SynapseX Chat is the browser AI chat app at chat.synapsex.ai . By the end of this page you will know exactly which jobs the app can do today and which page in this section walks you through each one.
There is one prerequisite: an account. Open chat.synapsex.ai/auth and choose Continue with Google — that also creates the account on first use. A signed-out request is rejected by the server, so sign in before you send anything.
What can I verify before I sign in?
The model catalogue is public. Run this and you get the exact list the picker shows:
curl -s https://chat.synapsex.ai/api/modelsThe response contains six models — Atlas, Forge, Vault, Nexus, Oracle and Quasar — each with its id, contextWindow and price per 1M tokens. Those six ids are what the model chip in the composer switches between. See Choosing a model.
What does the interface look like?
The composer (the message box at the bottom) carries everything you need for a turn:
| Control | What it does |
|---|---|
| Model chip | Shows the current model. Click it, or press Cmd+Shift+P, to switch. |
+ menu | Opens Add files or photos to attach a document or image. |
| Microphone button | Records your voice and transcribes it into the message box. |
| Lightning chip | Turbo. Reads Turbo Auto by default. |
| Persona chip | Switches between five built-in system-prompt presets. |
The sidebar holds your chat history with pinning and projects, the mode switcher (Chat and Work are the areas covered here), and the entry points to Agents, Context (Memories, Libraries) and Work > Skills. Toggle it with Cmd+B. Press Cmd+K to search across your chats, and Cmd+Shift+U to start a new one.
Settings is where the durable preferences live. The tabs that matter for everything documented in this section are Personalization, Models, Capabilities, Appearance, Voice, API Keys and Billing. Other tabs exist in the app; they are not covered here.
Task index
| Page | The job it does |
|---|---|
| Choosing a model | Pick the right one of the six SynapseX LLMs for a conversation. |
| Conversations and projects | Keep a month of work findable with projects, pinning, search and export. |
| Files and documents | Attach a PDF or spreadsheet and get answers grounded in its contents. |
| Voice input | Dictate a message, or hold a hands-free spoken conversation. |
| Turbo | Get several candidate answers judged and merged on hard questions. |
| Memory and personalization | Stop re-explaining your role, stack and preferred tone. |
| Custom skills | Write instruction packs that apply automatically to every chat. |
| AI agents | Start a conversation from a ready-made agent persona, or define your own. |
| Quantum backends | Ask which quantum simulators and QPUs are reachable through QCOS. |
| Limits and errors | Understand every quota and what each error code means. |
Scope of this section
These pages document the Chat area and the Work > Skills area only. Other entries in the sidebar are either not generally available or not covered by this documentation.
Two neighbouring topics live elsewhere: your plan, quota and billing are in Chat plans, and the personal sxc_ keys you mint in Settings > API Keys to connect the Desktop app or CLI are in Chat API keys.