Now I have all the details. Here's the comprehensive comparison: <hr> ## OpenCode Go vs. OpenCode Zen — Key Differences Both are **optional** AI model providers you can use with OpenCode (the AI coding agent). They serve different purposes: --- ### 💰 **Pricing Model** | | **Go** | **Zen** | |---|---|---| | **Cost** | **$5 first month, then $10/month** subscription | **Pay-as-you-go** — add credits, charged per request | | **Limits** | Hourly ($12), weekly ($30), monthly ($60) usage caps | No fixed limits — spend what you add | | **Overage** | Optional fallback to Zen balance | N/A | --- ### 🤖 **Available Models** | **Go** | **Zen** | |---|---| | ~14 **open-source** / open-weight models | ~50+ models including **frontier proprietary models** | | GLM-5.2, GLM-5.1 | ✅ All Go models **plus** | | Kimi K2.7 Code, K2.6 | **GPT-5.5, GPT-5.4, GPT-5.3** (OpenAI) | | Qwen3.7 Max, Plus, Qwen3.6 Plus | **Claude Fable 5, Opus 4.8, Sonnet 5** (Anthropic) | | DeepSeek V4 Pro, V4 Flash | **Gemini 3.5 Flash, Gemini 3.1 Pro** (Google) | | MiniMax M3, M2.7 | **Grok, Nemotron, North Mini Code**, and more | | MiMo-V2.5, MiMo-V2.5-Pro | Also offers **free models** (DeepSeek V4 Flash Free, etc.) | **Key:** Go = open models only. Zen = open models + latest proprietary frontier models. --- ### 🎯 **Purpose & Design** | **Go** | **Zen** | |---|---| | **Low-cost subscription** designed for frequent, predictable use of open models | **Curated gateway** giving access to **tested + best-configured** models from many providers | | Great for **international users** (hosted in US, EU, Singapore) | Best if you want the **latest frontier models** (GPT-5.5, Claude Opus 4.8, etc.) | | All models are **pre-tested** & benchmarked by OpenCode team | Also pre-tested & benchmarked, but with a **much wider selection** | --- ### 🔌 **Access Method** | **Go** | **Zen** | |---|---| | Model ID format: `opencode/<model-id>` (e.g., `opencode/glm-5.2`) | Same format: `opencode/<model-id>` (e.g., `opencode/gpt-5.5`) | | Endpoints at `opencode.ai/zen/go/v1/...` | Endpoints at `opencode.ai/zen/v1/...` | | Subscribe in console, get API key | Add credits in console, get API key | --- ### 🏢 **Multi-user / Workspace** - **Go:** Only **one member per workspace** can subscribe. - **Zen:** Any workspace member with credits can use it. --- ### 🎯 **Which Should You Choose?** - **Go** → If you want a **flat-rate subscription** ($10/mo) and are happy using capable **open models** like Qwen, DeepSeek, GLM, Kimi, etc. - **Zen** → If you need access to **frontier proprietary models** (GPT-5.5, Claude, Gemini) and prefer paying **per-request** rather than a subscription. - **Both** → You can use both, and Go can even **fall back to Zen** credits if you hit your Go limits! <hr> *Source: [OpenCode Go docs](https://opencode.ai/docs/go/) and [OpenCode Zen docs](https://opencode.ai/docs/zen/)*