Download

Get Cocodrilo.

Cocodrilo installs straight from the Rhino Package Manager.

Cocodrilo is also listed on food4Rhino .

Free until the end of 2026.

Open the Package Manager

In Rhino 8, open Tools → Package Manager (or run the PackageManager command).

Search for “Cocodrilo”

Tick Include pre-releases so the latest beta appears.

Install & restart

Click Install, then restart Rhino.

Requires Rhino 8. Remember to enable Include pre-releases to access the current beta.

AI assistant · Optional

Connect Claude.

To switch the assistant on you can connect Claude in two ways. A Claude subscription and an Anthropic API key are separate products. Pick whichever fits how you already use Claude.

Option A

Use your Claude subscription

Best if you already pay for Claude Pro or Max. Instead of a pay-as-you-go API key, you mint a token from your subscription and paste it into the same panel field - usage counts against your plan, with no separate API billing to track.

Get a Claude plan

Subscribe to Claude Pro or Max at claude.ai. The free plan won't work for this.

Install Claude Code

The token is minted by Claude Code. Install it with npm install -g @anthropic-ai/claude-code (needs Node.js).

Generate a subscription token

Run claude setup-token. A browser opens, approve access with your Claude account, and the terminal prints a one-year OAuth token.

Connect it in Grasshopper

Copy the token into a Grasshopper panel and connect it to Key / Token of the chat component.

The token lasts about a year and draws on your Claude plan's usage limits. Treat it like a password - keep it out of shared files and version control.

Option B

Use an Anthropic API key

Best if you want pay-as-you-go billing with no subscription.

Create a Console account

Go to the Anthropic Console and sign up or log in. This is separate from any claude.ai subscription.

Add billing credit

Under Plans & Billing, add a payment method and buy credits. The API is prepaid, pay-per-use.

Create an API key

Open Settings → API keys → Create Key.

Connect it in Grasshopper

Copy the API Key into a Grasshopper panel and connect it to Key / Token of the chat component.

Treat the key like a password - never share it or commit it to a repo. You can revoke or rotate it any time in the Console.