Configure a compatible Claude Desktop workflow
Claude Desktop configuration varies by release and workspace policy. Use the endpoint and header values from the live docs, keep the key private, and test the desktop workflow before adding connectors or local tools.
Before you connect
- Install the current Claude Desktop release and close it before changing its configuration.
- Create a dedicated relay.fast key and define the minimum model access required.
- Confirm whether your organization permits custom API endpoints and local connectors.
Validate the complete path
Send a short message, test streaming and context limits, then try one controlled tool call. Review the API response, account usage, and service status before using the setup for sensitive work.
One-command setup
The script configures Claude Desktop for relay.fast. It asks for the API key inside the script, so the key never appears in the command or shell history. Every downloaded file is checked against a published SHA-256 checksum, and running it again can restore the previous settings.
Windows (PowerShell):
powershell -NoProfile -ExecutionPolicy Bypass -Command "irm https://relay.fast/downloads/setup/install-claude-desktop-en.ps1 | iex"macOS and Linux:
curl -fsSL https://relay.fast/downloads/setup/install-claude-desktop-en.sh | bashYou can read the script before running it by opening the same URL in a browser.
Current prices of models for coding agents
Prices checked from the live catalog. "From" is the lowest price among the relay.fast sources that currently serve the model. The price you pay depends on the source your request uses and can change on any day. The pricing page always shows current values.
| Model | Model ID | Official input / output per 1M tokens | relay.fast from, input / output | Cache read from | Context |
|---|---|---|---|---|---|
| Claude Sonnet 5.5 | claude-sonnet-5-5 | $2 / $10 | $0.238 / $1.19 (−88%) | $0.0238 | 1M |
| Claude Opus 5.5 | claude-opus-5-5 | $4 / $20 | $0.111 / $0.556 (−97%) | $0.00556 | 1M |
| GPT-6.1 Sol requests above 272K input tokens cost more | gpt-6.1-sol | $2 / $10 | $0.03 / $0.15 (−98%) | $0.0015 | 1.05M |
| GLM-5.3 | glm-5.3 | $1.4 / $4.4 | $0.035 / $0.11 (−97%) | $0.0065 | 1M |
| Kimi K3 | kimi-k3 | $3 / $15 | $0.15 / $0.75 (−95%) | $0.015 | 1.05M |
| DeepSeek V4.1 Flash price depends on the time of day; the peak-hours price is shown | deepseek-v4.1-flash | $0.3 / $1.2 | $0.03 / $0.12 (−90%) | $0.0006 | 1M |
Frequently asked questions
Will every Claude Desktop feature work?
No. Desktop features can depend on the client release, model capability, connector, and account policy. Test the specific workflow you need.
Where do I find the exact config?
Use the current relay.fast docs and Claude Desktop documentation together; do not copy an old JSON snippet without checking its version.
Can I reuse a key from a shared machine?
Use separate keys per person or environment and rotate them when access changes.