OpenCode

Open source agent supporting 75+ LLM providers with privacy-focused architecture

Overview

OpenCode is an open source coding agent that supports 75+ LLM providers. In Blocks, OpenCode currently supports Anthropic (Claude models) and OpenAI (GPT models), with additional provider support planned. With over 650,000 monthly users, OpenCode offers a privacy-focused approach where no code is stored on external servers.

OpenCode is currently experimental and may have different behavior or limitations compared to stable agents like Claude Code or Codex.

Latest Models

OpenCode provides access to multiple providers through its curated “Zen” model service. In Blocks, the following providers are currently supported:

• OpenAI: GPT-5, GPT-4o, GPT-4 Turbo
• Anthropic: Claude 4.5 Opus, Claude 4.5 Sonnet
• Moonshot AI: Kimi models (via KIMI_API_KEY)

While OpenCode supports 75+ providers including Google, AWS Bedrock, Groq, OpenRouter, and Azure, Blocks currently supports Anthropic, OpenAI, and Kimi API keys. Additional provider support is coming soon.

Authentication

OpenCode supports multiple authentication methods depending on your provider. In Blocks, the following providers are supported:

Anthropic API Key

Use Anthropic models (Claude 4.5 Opus, Sonnet)

1. Get an API key at Anthropic Console
2. Set the environment variable: ANTHROPIC_API_KEY=sk-ant-...
3. In Blocks Dashboard, go to Dashboard → Agents
4. Select OpenCode and choose “Anthropic”
5. Paste your API key

OpenAI API Key

Use OpenAI models (GPT-5, GPT-4o)

1. Get an API key at OpenAI Platform
2. Set the environment variable: OPENAI_API_KEY=sk-...
3. In Blocks Dashboard, go to Dashboard → Agents
4. Select OpenCode and choose “OpenAI”
5. Paste your API key

Kimi API Key

Use Moonshot AI’s Kimi models

1. Get an API key at Moonshot AI Platform
2. Set the environment variable: KIMI_API_KEY=...
3. In Blocks Dashboard, go to Dashboard → Agents
4. Select OpenCode and choose “Kimi”
5. Paste your API key

Other Providers

Currently limited to Anthropic, OpenAI, and Kimi

While OpenCode supports 75+ providers (Google AI, Groq, Azure, OpenRouter, AWS Bedrock, etc.), Blocks currently only supports authentication via:

• ANTHROPIC_API_KEY (for Claude models)
• OPENAI_API_KEY (for GPT models)
• KIMI_API_KEY (for Kimi models)

Support for additional providers (Google, Groq, Azure, OpenRouter, etc.) is planned for future releases.

Setting as Default

To use OpenCode automatically for all requests:

1. Go to Dashboard → Agents
2. Select “Set as default agent” from OpenCode’s dropdown menu

Using OpenCode

Once configured, OpenCode is used automatically if it’s your default agent:

@blocks can you review this code?

Or use the /opencode slash command to use it specifically:

@blocks /opencode implement this feature using GPT-5

Best For

• Flexibility between OpenAI, Anthropic, and Kimi models
• Privacy-focused development (no code storage)
• Open source transparency
• Cost optimization (switch between providers based on task complexity)
• Experimentation with different models from major providers
• Teams wanting to avoid vendor lock-in

Currently supports Anthropic, OpenAI, and Kimi providers in Blocks. Support for additional providers (Google, Groq, Azure, etc.) is coming soon.

Cost

OpenCode costs vary by provider. Currently supported in Blocks:

• Anthropic: Check Anthropic Pricing for Claude models
• OpenAI: Check OpenAI Pricing for GPT models
• Moonshot AI: Check Moonshot AI Platform for Kimi pricing

Monitor usage in each provider’s console. API usage is billed directly by your chosen provider.

You can switch between Anthropic, OpenAI, and Kimi to optimize costs based on task complexity. Use the provider that best fits your needs and budget for each task.

Next Steps

Claude Code

Learn about Claude Code

Codex Agent

Explore Codex capabilities