OpenCode

GreenPT is a built-in OpenCode provider. Sign in with opencode auth login and pick a model, no provider block required.

OpenCode is an open-source, terminal-native coding agent. GreenPT is one of its built-in providers, so the base URL, the adapter and the model list all ship with OpenCode. You sign in once and pick a model.

No config file needed

Earlier versions of this guide had you write a provider block into opencode.json. That is no longer necessary, and a hand-written block will shadow the built-in one. Delete any provider.greenpt entry you added previously.

Prerequisites

OpenCode installed (opencode.ai/docs)
A GreenPT API key: manage API keys

opencode auth login

Choose GreenPT from the provider list, then paste your key. OpenCode writes it to ~/.local/share/opencode/auth.json. Inside a running session the same flow is the /connect command.

Prefer not to store the key on disk? Export it instead and skip this step:

export GREENPT_API_KEY="your-greenpt-key"

2. Pick a model

opencode              # then run /models and choose a GreenPT model

Every GreenPT model appears under the GreenPT provider, referenced as greenpt/<model-id>. To see the list without starting a session:

opencode models greenpt

Recommended models

glm-5.3z.aiFlagship

The newest z.ai flagship reasoning model, successor to glm-5.2, with agentic tool-use at the same price.

Input€1.10

Cached input€0.275

Output€4.40

Context1M

ReleasedAug 2026

ChatReasoningTool useAgentic coding

Use it for: The default: agentic, multi-file work across a large codebase.

deepseek-v4.1-flashDeepSeek

DeepSeek V4.1 Flash, a multimodal reasoning model with a 1M-token context window for chat and agentic coding.

Input€0.22

Cached input€0.011

Output€1.10

Context1M

ReleasedSep 2026

ChatReasoningVisionLong context

Use it for: Routine edits, quick questions and test runs, at a fraction of the cost.

The picker holds the rest of the catalogue too. See Model Cards for every model and its price.

3. Pin a default (optional)

To fix one model for a repository, add an opencode.json in its root. This is the only config GreenPT needs, and it is entirely optional:

{
  "$schema": "https://opencode.ai/config.json",
  "model": "greenpt/glm-5.3"
}

The same key works in the global config at ~/.config/opencode/opencode.json; a project file overrides it.

Verify the connection

A quick sanity check outside of OpenCode:

curl https://api.greenpt.ai/v1/models \
  -H "Authorization: Bearer $GREENPT_API_KEY"

You should get back a list including glm-5.3. If this fails, fix the API key before troubleshooting inside OpenCode.

Troubleshooting

Symptom	Fix
GreenPT is missing from `opencode auth login`	Update OpenCode. The provider list comes from models.dev, which older builds cache
No GreenPT models under `/models`	You are signed out. Run `opencode auth login`, or set `GREENPT_API_KEY` in the shell OpenCode launches from
Authentication failed	The key is wrong or belongs to another environment. Test it with the `curl` command above
A stale model is offered	Your build's model list is behind ours. `opencode models greenpt` shows what OpenCode knows; `/v1/models` is the live truth
Config changes not applying	A project `opencode.json` overrides the global one. Check for a competing file in the repo root