About Synthetic

Synthetic.new is a privacy-focused AI platform offering private access to multiple open-source LLMs through simple flat-rate subscriptions starting at $20/month for 125 requests per 5 hours or $60/month for 1250 requests.

The platform provides access to 19+ always-on models including Llama 3 variants with up to 128K token context windows, specialized coding models, and task-specific LoRA adapters, with guaranteed privacy through no training on user data and automatic deletion within 14 days.

Key features include OpenAI-compatible API for integration with tools like Roo, Cline, and Octofriend, web-based chat interface, on-demand model launching from Hugging Face repositories on cloud GPUs with separate per-minute billing, predictable pricing without per-token charges, and support for large context coding tasks.

The platform prioritizes developer workflows and code generation with strong privacy guarantees and cost-effective access to powerful open-source models.

Step by step guide to use Synthetic API Key to chat with AI

I. Get Your Synthetic API Key

First, you'll need to obtain an API key from Synthetic. This key allows you to access their AI models directly and pay only for what you use.

  1. Visit Synthetic's API console
  2. Sign up or log in to your account
  3. Navigate to the API keys section
  4. Generate a new API key (copy it immediately as some providers only show it once)
  5. Save your API key in a secure password manager or encrypted note

Sometimes, this provider will require you to add a payment method to your account before you can use your API key to chat with AI. So, to avoid any hiccups, make sure you've got a payment method set up and ready to go!

Important: Keep your API key secure and never share it publicly. Store it safely as you'll need it to connect with TypingMind.

II. Connect Your Synthetic API Key on TypingMind

Once you have your Synthetic API key, connecting it to TypingMind to chat with AI is straightforward:

  1. Open the Models page

    Open TypingMind, click "Models" in the left sidebar, then click "Add custom model" in the top right corner.

    TypingMind Models page with the Add custom model button

  2. Enter the model details

    Keep "Create Manually" selected and fill in the model details:

    Name: hf:meta-llama/Llama-3.1-70B-Instruct via Synthetic (or your preferred name)
    Model ID: hf:meta-llama/Llama-3.1-70B-Instruct for example (check Synthetic model list)
    Context Length: Enter the model's context window (e.g., 128000 for hf:meta-llama/Llama-3.1-70B-Instruct)
    Add Custom Model dialog in TypingMind filled in for hf:meta-llama/Llama-3.1-70B-Instruct

  3. Set up authentication

    In the "Authentication" tab, set the connection details:

    API Type: OpenAI Chat Completions API
    Endpoint URL: https://api.synthetic.new/openai/v1/chat/completions
    Authentication Type: API Key via HTTP Header
    Header Key: Authorization
    Header Value: Bearer <SYNTHETIC_API_KEY>
    Synthetic authentication settings in TypingMind

  4. Add pricing (optional)

    Open the "Pricing" tab and enter the model's input, output, and cache prices per 1M tokens so TypingMind can estimate your usage costs.

    Pricing settings in TypingMind for hf:meta-llama/Llama-3.1-70B-Instruct

  5. Check the capabilities

    In the "Capabilities" tab, keep "Auto check capabilities on save" on so TypingMind detects supported features like plugins, image input, and thinking, or enable them manually.

    Custom model capabilities settings in TypingMind

  6. Test and save

    Click "Test & Save" to verify the connection and add the model.

III. Start Chatting with Synthetic models

Now you can start chatting with Synthetic models through TypingMind:

  • Select Synthetic models from the model dropdown menu
  • Start typing your message in the chat input
  • Enjoy faster responses and better features than the official interface
  • Switch between different AI models as needed
Chat with Synthetic models on TypingMind

💡 Pro tips for better results:

IV. Monitor Your AI Usage and Costs

One of the biggest advantages of using API keys with TypingMind is cost transparency and control. Unlike fixed subscriptions, you pay only for what you actually use. Visit your Synthetic usage dashboard to monitor your API usage and set spending limits.

💡 Cost-saving tips:
  • Use less expensive models for simple tasks
  • Keep prompts concise but specific to reduce token usage
  • Use TypingMind's prompt caching to reduce repeat costs (How to enable prompt caching)
  • Using RAG (retrieval-augmented generation) for large documents to reduce repeat costs (How to use RAG)
TypingMindSynthetic

Why TypingMind + Synthetic?

Chat with Synthetic models and 200+ other models in one workspace, using your own Synthetic API key.

Best-in-class UI

TypingMind's interface is far superior to standard chat UIs.

Model flexibility

Switch between Synthetic models and 200+ models instantly.

Cost control

Pay only for what you use through Synthetic.

One-time purchase

Buy TypingMind once, use forever with any Synthetic model.

Data privacy

Your conversations are stored locally by default, not on external servers.

Plugins, MCP, Skills & AI agents

Extend Synthetic models with web search, image generation, and custom AI agents.

Try TypingMind for free

Frequently Asked Questions

Do I need a subscription to use Synthetic with TypingMind?

No. With your own Synthetic API key, you pay only for what you use, with no monthly subscription. TypingMind is also a one-time purchase, not a subscription.

How much does the Synthetic API cost?

Synthetic charges per token, and prices vary by model. For example, hf:meta-llama/Llama-3.1-70B-Instruct costs $0.9/1M input tokens and $0.9/1M output tokens. A typical conversation costs around $0.01-0.10, depending on the model and length.

Which Synthetic models can I use in TypingMind?

Any model your Synthetic API key can access. You can switch between Synthetic models and models from other providers in the same TypingMind chat.

Is my data private when using Synthetic with TypingMind?

TypingMind stores your conversations locally (in your browser on the web version, on your device in the desktop app). Your messages are sent to Synthetic with your API key, so check Synthetic's data policy for how it handles API requests.