Kimi K2.5 Turbo + OpenCode: Speed-First Coding Setup

Kimi’s K2 Turbo variants trade some of the deep-reasoning focus for raw speed, which is exactly what you want in an interactive coding loop. Pair one with OpenCode — free, open, terminal-first — and you get a responsive agent that doesn’t keep you waiting between edits, at pay-per-token rates.

This is the speed-first OpenCode + Kimi setup. For OpenCode’s general provider model, see OpenCode custom providers.

Why Turbo for an agent#

Agentic coding is a tight loop of read, edit, run, read again. A faster model shortens every step, so the session feels fluid rather than stop-start. K2 Turbo is built for that throughput. Keep K2 Thinking in reserve for the genuinely hard problems where reasoning depth beats speed.

Step 1: Install OpenCode and get a Moonshot key#

npm install -g opencode-ai

Sign up on the Moonshot platform and create an API key. On Windows, WSL gives the cleaner shell — see install OpenCode on Windows with WSL.

Step 2: Add the Kimi provider#

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "moonshot": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "Moonshot Kimi",
      "options": {
        "baseURL": "https://api.moonshot.ai/v1",
        "apiKey": "{env:MOONSHOT_API_KEY}"
      },
      "models": {
        "kimi-k2-turbo": { "name": "Kimi K2 Turbo" },
        "kimi-k2-thinking": { "name": "Kimi K2 Thinking" }
      }
    }
  },
  "model": "moonshot/kimi-k2-turbo"
}

Export the key:

export MOONSHOT_API_KEY="sk-your-key"

Confirm the exact model IDs on Moonshot’s docs.

Step 3: Run it#

opencode

The default is moonshot/kimi-k2-turbo. Switch to Thinking in the TUI when a task needs more reasoning.

Pricing#

Kimi is pay-per-token with cache-hit discounts and no flat coding plan. Turbo may carry a slightly different rate than the base model for its speed — confirm on Moonshot’s docs. Full picture in Kimi K2 pricing explained.

Troubleshooting#

• Provider not found — the provider key (moonshot) must match the model prefix.
• Auth errors — MOONSHOT_API_KEY not set in the launching shell.
• Format errors — you used /anthropic; switch to /v1.
• Model rejected — confirm the Turbo model ID on Moonshot.

Wrapping up#

Kimi K2 Turbo with OpenCode is the setup for responsiveness: add a Moonshot provider on the /v1 endpoint, list the Turbo model, and set it as default. The high throughput keeps the agent loop fast, while K2 Thinking stays one switch away for hard problems. It’s pay-per-token with cache discounts, so cost stays low.

To run Kimi elsewhere, see run Kimi K2 Thinking with Claude Code or Kimi K2 + Aider on WSL.