OpenCode Go API Key Guide: $5/Month for $60 Quota & DeepSeek V4 Flash

Why OpenCode Go?

OpenCode Go is a subscription for Coding Agents — $5 first month, $10/mo after — granting $60/mo quota pool plus dedicated Hy3 and GPT-5.6 discounts. The DeepSeek V4 Flash internal rate is far cheaper than official, so $60 lasts for massive refactors.

Free Basis (Rethinking Free)

This is not a permanent free API but a high-leverage subscription: 12x quota multiplier in month 1. The free leverage is the deal — you pay $5 and get $60 worth of compute. Official DeepSeek peak pricing and caching still apply under the hood, but internal pricing is heavily optimized.

Languages & Capabilities

Chinese + English, code generation, agentic tool calling, 1M context, OpenAI-compatible chat completions.

Step-by-Step

Step 1: Open https://opencode.ai/go?ref=SVE58K5K80 — login with GitHub or Google (one click).

Step 2: Choose OpenCode Go plan. First month auto-applies $5 discount, renews at $10/mo. Complete payment.

Step 3: Go to API Keys → Create New Key → copy. Set base_url="https://opencode.ai/zen/v1".

Code Examples

cURL

bash

curl https://opencode.ai/zen/v1/chat/completions \
  -H "Authorization: Bearer $OPENCODE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"deepseek-v4-flash","messages":[{"role":"user","content":"Hello Go!"}]}'

Python

python

from openai import OpenAI
client = OpenAI(base_url="https://opencode.ai/zen/v1", api_key="YOUR_OPENCODE_API_KEY")
resp = client.chat.completions.create(model="deepseek-v4-flash", messages=[{"role":"user","content":"Explain OpenCode Go quota"}])
print(resp.choices[0].message.content)

Perk

Use referral SVE58K5K80 via https://opencode.ai/go?ref=SVE58K5K80 — your $5 first month unlocks $60 quota. See freeaiapi.org for usage tips.

Why Go vs. Zen?

Zen is pay-as-you-go with one-time deposit for free models; Go is subscription with monthly quota — best for daily coding. Pick Go if you code daily.