Help
Everything you need to know — modes, features, pricing, and tips.
Getting started
Every new account gets a batch of free messages on selected models, to use within a limited window — no credit card required. Use them however you like to explore the workspace, try different modes, and see how AiFuse works.
After your trial, add funds to unlock all models and providers.
You'll see the exact cost after each response. There are no subscriptions — your balance is yours to use at your own pace.
For the full product tour, see How it works.
Tips for better results
- Be specific.
❌ "Write something about marketing"
✅ "Write a 200-word LinkedIn post about email marketing trends for B2B SaaS, professional tone" - Provide context.
❌ "Is this a good price?"
✅ "I'm comparing cloud hosting in Europe for a small SaaS app with ~1000 users. Is €49/month for a 4-core VPS a good price?" - Assign a role.
❌ "Help me with this code"
✅ "You are a senior Python developer. Review this function for performance issues and suggest improvements" - One chat per subject. Start a new conversation when you change topics — it keeps responses focused and avoids confusing the model with unrelated history.
- Break down complex tasks. Instead of "Build me a full website," start with "Design the navigation structure," then "Write the homepage copy," then "Create the CSS layout." Step by step gets better results.
- Iterate. If the first answer isn't right, refine your prompt rather than starting over. Tell the AI what to change: "Make it shorter," "More formal tone," "Focus on the cost comparison."
- Context limits. Every AI model has a context limit. Very long conversations may lose earlier messages — start fresh when things get long.
The message bar and its + menu
Below the message box is a row with a + button and Send, plus an Incognito badge when the conversation is Incognito. The + button opens a short menu — that is where attachments, web search and the Prompt Builder live.
- Attachments — Attach files for the AI to read and analyse. Drag and drop onto the composer, paste from the clipboard, or pick Attach from the + menu. Useful for reviewing documents, extracting data from images, summarizing reports, or debugging code. Supported file types depend on the model — if a model doesn't support your file type, you'll see a clear error message. You can attach up to 5 files per message, each up to 10MB. Chat attachments are not saved to your account: they go to the AI provider that answers and are not kept in your conversation history. Files you pin to a Project are different — those are stored, so every conversation in the project can use them.
- Prompt Builder — Opens a guided form that builds a structured prompt. Pick a subject area and a role for the AI, describe your task, then choose tone, length and output format. When you're done, the assembled prompt is placed in the message box — review or edit it, then send it yourself. Great for complex requests or when you're not sure how to phrase something.
- Incognito — Choose Incognito before your first message. Incognito conversations are never saved to your history — they exist only while the session is open and are gone when you leave or refresh. They also send no context: the AI receives that one message, without your earlier messages, memories, preferences or project instructions. The choice is fixed once the conversation starts — begin a new chat to change it. See Privacy & security below.
- Send — Send your message to the selected model. While the AI is responding, the Send button becomes a Stop button — tap it to cancel the response at any time.
Context levels
Context controls how much conversation history is sent to the AI with each message. More context means the AI remembers more of your conversation, but costs more since you're sending more tokens.
AiFuse offers four levels:
| Level | What it does | Best for |
|---|---|---|
| Economy | Up to 10 recent messages, capped at 2,500 tokens | Quick questions, simple tasks, keeping costs low |
| Balanced | Up to 25 recent messages, capped at 4,800 tokens | Most conversations — the default for Single and Fusion |
| Quality | Up to 50 recent messages, capped at 10,000 tokens | Long, complex discussions where earlier context matters |
| None | Current message only — no conversation history | Standalone one-shot questions, or stateless comparisons in Duo |
Each mode has a different default:
| Mode | Default | Why |
|---|---|---|
| Single | Balanced | Good balance of cost and context for regular conversations |
| Duo | Balanced | Conversation memory across turns, with 'Use this' to choose which reply becomes the shared context |
| Fusion | Balanced | The orchestrator needs conversation history to refine effectively |
You can change the context level at any time: open the + menu in the composer and choose Conversation settings. Higher levels send more of your conversation with each message, so they cost more — Quality can send around four times the history Economy does. If the AI starts forgetting earlier details, try a higher context level — or start a fresh conversation.
Duo has two sub-modes depending on context: with Economy, Balanced (default), or Quality selected, Duo runs in interactive mode — you pick your preferred reply each turn with the 'Use this' button, and that response becomes the shared context for the next message. Select None and Duo switches to compare mode — each message becomes a standalone, independent comparison with no conversation memory.
Conversation history
Click the History icon in the sidebar to open the history panel. It shows all your past conversations grouped by time — Today, Yesterday, Last 7 Days, and Older.
You can search your conversations by title or by the preview text shown in the list, rename them with the pencil icon, or delete them with double-click confirmation. Each entry shows the model used and when it was last updated.
History is unified across all modes — Single, Duo, and Fusion conversations appear in the same list with a badge showing which mode each one used. Click any entry to resume it, and the workspace automatically switches to the right mode. Conversations created in Incognito mode are never saved to history.
Projects
Projects let you group conversations with shared context. Create a project from the Projects button in the sidebar — give it a name, an optional system prompt (instructions that apply to every conversation in the project), and pin reference files that all conversations can access.
After each conversation, AiFuse auto-generates a summary so the project “remembers” what was discussed. When you start a new conversation in a project, the AI sees the system prompt, pinned files, and previous summaries — building continuity across sessions. You can also move existing conversations into a project from the history panel. Auto-summaries are a flat $0.0005 each. Moving a conversation into a project generates its summary at the model's normal price instead, and conversations themselves always use standard model pricing.
Usage page
The Usage page shows your credit balance, total messages, average cost per message, and an estimate of how many days your balance will last at your current pace.
A 7-day chart breaks down your daily requests and costs. Below that, usage statistics show totals for Today, Last 7 Days, and Last 30 Days, along with your top models and provider split.
The activity feed at the bottom lists your recent messages, voice sessions, and image/video generations with timestamps, models used, token counts, and costs.
Free trial
Every new account gets a batch of free messages on selected models, to use within a limited window — no credit card required. The trial section on the Usage page shows how many you have left and how long the window runs.
Trial messages are marked in your activity feed. Some features like Voice require a funded account and are not available during the trial.
After the trial ends, add funds to continue using AiFuse. Your conversation history and settings are preserved.
Account settings
The Settings page (accessible from the user menu) lets you customize your experience:
- Memory: Let AiFuse remember details about you from past conversations to personalize replies in Single and Auto chat. You can view and delete anything it has learned.
- Web search: Let AiFuse look up current information when a question needs it, in every chat mode. Most messages are answered without a search.
- Default mode: Choose which chat mode (Auto, Single, Duo, or Fusion) opens by default.
- Context presets: Set the default context level for each mode independently.
- Default model: Pick a preferred model that's pre-selected when you start a new conversation.
- Reply style: Choose how the AI phrases its replies — professional, casual, technical or simple. Applied to Single and Auto chats.
- Reply length: Set how much detail the AI aims for — concise, default or detailed. Applied to Single and Auto chats.
- Appearance: Switch between Light, Dark, and Auto (follows your system) themes.
- Language: Switch the interface between English and Español.
- Change password: Update your account password.
- Export data: Download all your account data as a JSON file.
- Clear conversation history: Permanently delete all your conversations across Single, Duo and Fusion. Your usage records and account are not affected.
- Delete account: Delete your account and all associated data. If your balance is empty, deletion is immediate. If you still have credit, you get a 48-hour window in which you can cancel it.
Privacy & security
- Your prompts go to the AI provider that answers them, and AiFuse never uses them for advertising. Some features send them further, and only when you use those features: in Auto, a short classification call goes to a low-cost model — which may be from a different provider — to decide which model should answer; with Web search on, your query also goes to Brave, our search provider; and Projects and Memory use a model to generate the summaries that carry context between conversations.
- Payment is handled entirely by Stripe — AiFuse never sees or stores your card details or address information. The less we know about you, the better you're protected.
- Incognito mode lets you chat without saving history — conversations only live in memory and are gone when you leave or refresh.
- Don't paste sensitive information like passwords, financial details, or personal identifiers into prompts — while AiFuse doesn't store them, the AI provider will process them.
Context vs Incognito: Context controls how much history the AI sees in a normal conversation. Incognito overrides it: with Incognito on, the AI receives only your current message whatever the Context setting says, and nothing is saved when you leave. Your Context choice applies again in your next normal conversation.
For full details, see our Privacy Policy.
Common issues
Quick fixes for the most common problems:
- Message didn't send: Your balance may be too low for the estimated cost. An "Add Funds" link appears in the error — click it to go to the Usage page and top up. In Art Studio, the Generate button is disabled when your balance is below the estimated cost.
- AI forgot earlier details: Your context level might be too low. Try switching to a higher level or start a fresh conversation.
- Response seems wrong or incomplete: Try a different model — each has different strengths. Or rephrase your prompt with more detail.
- Costs seem higher than expected: Long conversations on Quality context cost more. Switch to Economy for simple tasks, or start a new conversation to reset the context.
Found a bug, want to request a new model, or have ideas for improvement?
Contact us and we'll help sort it out.