Free OpenCode Zen API Key, Base URL & Rate Limits
Model ProviderOpenCode Zen is the hosted model API behind OpenCode's developer tooling.
How to get a free OpenCode Zen API key
- 1 Create an OpenCode Zen account Sign up at opencode.ai/auth — no billing details required.
- 2 Copy your API key from the workspace Keys page
- 3 Pick a model Run /models in the OpenCode TUI, or use a model ID like big-pickle directly.
- 4 Configure your client Base URL: https://opencode.ai/zen/v1
Provider Snapshot
Supported Models 10 models
View in directory →| Model ID | Developer | Context | Availability | Free Tier | Use cases |
|---|---|---|---|---|---|
| nemotron-3-ultra-free Nemotron 3 Ultra 550B A55B | OpenCode Zen | 1.0M | Online | Yes | chat |
| deepseek-v4-flash-free DeepSeek V4 Flash | OpenCode Zen | 1.0M | Online | Yes | chat |
| mimo-v2.5-free MiMo-V2.5 | OpenCode Zen | 1.0M | Online | Yes | chat |
| north-mini-code-free North Mini Code | OpenCode Zen | 256K | Online | Yes | chat |
| big-pickle big-pickle | OpenCode Zen | N/A | Online | Yes | chat |
| laguna-s-2.1-free Laguna S 2.1 | OpenCode Zen | 1.0M | Online | Yes | chat |
| longcat-2.0-free LongCat-2.0 | OpenCode Zen | 1.0M | Online | Yes | chat |
| ling-3.0-flash-free ling-3.0-flash-free | OpenCode Zen | 8K | Online | Yes | chat |
| hy3-free Hy3 preview | OpenCode Zen | 256K | Online | Yes | chat |
| ling-3.0-tiny-free ling-3.0-tiny-free | OpenCode Zen | 8K | Online | Yes | chat |
Developer Tools
Related Providers
View all →OpenCode Zen FreeLLM Score free API access score
How we score →What is OpenCode Zen?
OpenCode Zen provides no-card API access to coding and reasoning models for terminal-first AI workflows.
OpenCode Zen is the hosted model API behind OpenCode's developer tooling. It exposes a /zen/v1 endpoint for free access to models such as Big Pickle, DeepSeek V4 Flash, MiMo-V2.5, Nemotron 3 Ultra, and North Mini Code. It is a good fit for developers who want quick experiments, coding agents, and command-line assistant workflows without adding billing details up front.
- No credit card required for API key setup
- Hosted endpoint for coding and reasoning models
- Works naturally with OpenCode terminal workflows
- Includes DeepSeek, Nemotron, MiMo, and North Mini Code variants
API Compatibility: Live-tested OpenAI-compatible Chat Completions
OpenCode Zen Free Tier Limits & Pricing
OpenCode Zen API Setup Tutorials
OpenCode Zen is fully compatible with popular AI coding assistants like Cursor, Claude Code, and more. To see step-by-step API configuration instructions for your favorite tool, please visit our Global Configuration Guide →
OpenCode Zen Model Use Cases
What OpenCode Zen's free models are best for, based on aggregated model capabilities:
OpenCode Zen Limitations & Caveats
- Free-tier limits are not published per model
- Model availability can change with the OpenCode Zen catalog
- Best suited to developer tooling and experiments rather than guaranteed production capacity
OpenCode Zen FAQ
Do I need a credit card to get an OpenCode Zen API key?
No. The current catalog links API key setup through opencode.ai/auth and marks the provider as no-credit-card for the listed free models.
Which OpenCode Zen models are available in the catalog?
The current free listings include Big Pickle, DeepSeek V4 Flash, MiMo-V2.5, Nemotron 3 Ultra, and North Mini Code.
What is the OpenCode Zen base URL?
Use https://opencode.ai/zen/v1 as the API base URL for the listed OpenCode Zen models.