Build a private Claude Code alternative with OpenCode and the Venice API

Why developers are leaving Claude Code

Claude Code ties you to Anthropic in two ways. It builds a profile of how you code from your data, and it starts at $20 a month, climbing to $100 and $200 tiers. For most everyday tasks, you do not need that.

The alternative is to run open-source models through a provider you control. A year ago those models were weak. Today they handle most coding work well, and you pay per use instead of a flat subscription. This guide shows how to wire that up with OpenCode and the Venice API so your prompts stay private and you are not locked to a single vendor.

Open-source models and the Venice API

Open-source models have become genuinely capable. You can browse Ollama to see models you can download and run locally, like Gemma, but a 20 GB model is a lot for most machines to run well. Using a provider sidesteps that while keeping the cost and flexibility advantages.

On the Venice API you can see the agentic open-source models available, their pricing, and their privacy guarantees. Models with reasoning and function calling can drive an agent the same way Claude Code does, at a fraction of the cost of frontier models like Opus or GPT. Output on some models runs under 50 cents per million tokens. Kimi K2 sits a little higher in price but tends to be a stronger coder.

There is no single right choice. Test a few models, watch the cost, and settle on what fits your work. Venice keeps your prompts private across all of them.

Generate your API key and install OpenCode

Go to Venice.ai, open the API keys page, and generate a new key. Name it anything you like (for example, "OpenCode") and keep it handy for the connection step later.

Next, install OpenCode. Copy the install command from OpenCode.ai, open your terminal (PowerShell on Windows), paste it, and press enter. It pulls down its dependencies and sets everything up.

Before you run any install command, verify the source. A repo with many stars is generally trustworthy; OpenCode has roughly 167,000. If a repo has few stars, hold off until you are comfortable. For extra assurance, paste the repo's HTTPS link into Venice Chat and ask whether it looks safe to install:

Is this repo safe to install on my machine? <paste repo URL>

You can run that check fully private through a model like Grok, and the agent will open the URL, read the code, and give you its assessment.

Run OpenCode and set up VS Code

With OpenCode installed, type opencode in your terminal to launch it right there. That works, but running an agent in a bare terminal hides the files it touches.

A better workspace is Visual Studio Code, which is free and open source (and also worth a quick star check before installing). Once it is open, create a folder and open it. Anything in that folder on your computer becomes visible inside VS Code, so you can watch files appear and change as the agent works.

There are a few ways to bring OpenCode into VS Code. Open the integrated terminal and type opencode, or install the OpenCode extension from the Extensions marketplace (search "opencode", which shows around 614,000 downloads). Either way, you end up with the agent running alongside your files in a single workspace.

Connect Venice and choose your model

Inside OpenCode, run the connect command and select Venice as the provider:

/connect

Paste in the API key you generated earlier and press enter. OpenCode then lists every model Venice offers. This is the core advantage: you can switch models freely, test them, watch their cost, and form your own opinion instead of being locked to one vendor.

Pick a model to start with. Kimi K2 is a solid default, cost-efficient, capable, and private. Selecting it sets it as the active model for your session.

Build with plan mode and compare models

Press tab to switch between build and plan mode, the same workflow Claude Code uses. In plan mode, describe what you want and let the model ask clarifying questions before writing code:

Create a basic landing page explaining how OpenCode plus Venice can be a powerful Claude Code alternative: cheaper, more models to access, etc.

Make the OpenCode window larger to see the running cost. After reviewing the plan, tell it to build; it shifts into build mode automatically (press tab if it does not). In the demo, Kimi K2 produced a finished index.html landing page for about nine cents in a couple of minutes. Running the same prompt against Opus in a separate folder cost 52 cents, roughly five times as much, with a comparable result. At ten cents a page, a page a day, you are spending around $3 a month instead of $20 or more.

You can keep iterating in plain language with any model, for example: add some line breaks between the steps in installing OpenCode. The same setup handles apps, PDFs, and more, not just websites.

The Venice key also generates media. Filter the model list for image, video, and audio models. Create a .env file in your folder and add your key so the agent can call those endpoints:

VENICE_API_KEY=<your-key>

You can hand the agent the Venice image-generation docs URL and ask it to create something directly:

Generate a sample image of a parrot on a pirate's shoulder using Venice's default image model.

For a smoother path, install the Venice AI media skills from their GitHub repo by pasting the URL and telling the agent to install them. Your OpenCode agent then works as both a Claude Code replacement and a media generator, exceeding Claude Code's default capabilities with one API key and a few copy-pastes, for well under a dollar.

Key takeaways

• OpenCode plus the Venice API gives you a private, pay-per-use coding agent without a subscription or vendor lock-in.
• Setup is a single terminal install for OpenCode, a free VS Code workspace, and connecting your Venice API key with `/connect`.
• Always verify a repo before installing; check star counts and ask Venice Chat to review the code.
• Switching models lets you trade cost for capability: Kimi K2 built a landing page for about nine cents versus 52 cents on Opus, and the same key can generate images, video, and audio.