Help
Everything you need to know — modes, features, voice, Art Studio, pricing, and tips.
Getting started
Every new account gets 14 days of free access to selected models — no credit card needed. You get 40 messages per day 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.
Input bar tools
The input bar includes several tools to help you work with AI more effectively.
- Attachments — Attach files for the AI to read and analyze. Drag and drop, paste from clipboard, or use the paperclip icon. 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. Files are never stored on AiFuse servers — they are sent directly to the AI provider and immediately discarded.
- Prompt Builder — Opens a guided form to structure your message. Choose from suggestion cards (Compare, Draft, Voice, Analyze) or set a custom role, instructions, and output format. The builder combines everything into a well-crafted prompt. Great for complex requests or when you're not sure how to phrase something. Make sure you've selected the right model before using the Prompt Builder — your prompt is sent automatically when you confirm.
- Incognito — Toggle Incognito mode on or off. See the Incognito mode section above for full details.
- 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 'Pick 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 from the dropdown next to the model selector. The cost difference between Economy and Quality can be 3–4x on longer conversations. 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 'Pick 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 conversations by title or content, 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 cost approximately $0.0005 each; conversations 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 14-day free trial with 40 messages per day on selected models — no credit card required. The trial section on the Usage page shows your remaining days and daily usage.
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:
- Default mode: Choose which chat mode (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.
- 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.
- Delete account: Permanently delete your account and all associated data.
Privacy & security
- Your prompts are sent only to the AI provider you select — nothing is shared across providers or used for advertising.
- 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: These are independent settings. Context controls how much history the AI sees. Incognito controls whether your conversation is saved. You can use both together — for example, Balanced context with Incognito on means the AI sees recent history during the session, but nothing is saved when you leave.
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.
- Voice won't start: Make sure your browser has microphone permission. Check that no other app is using the mic. Try refreshing the page.
- Voice says insufficient balance: Voice requires a funded account and is not available during the free trial. Add funds to enable voice sessions.
Found a bug, want to request a new model, or have ideas for improvement?
Contact us and we'll help sort it out.