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Decodie

Provider Setup

import { Tabs, TabItem, Steps } from ‘@astrojs/starlight/components’;

Decodie needs an API key from an LLM provider to power its analysis, explanation, and Q&A features. You can use any of the supported providers — pick whichever you prefer.

Get an API key

Section titled “Get an API key”
1. Go to [console.anthropic.com/settings/keys](https://console.anthropic.com/settings/keys) 2. Sign up or log in 3. Click **Create Key** 4. Copy the key (starts with `sk-ant-api03-`) 
Default model: `claude-sonnet-4-6`
 1. Go to [platform.openai.com/api-keys](https://platform.openai.com/api-keys) 2. Sign up or log in 3. Click **Create new secret key** 4. Copy the key (starts with `sk-`) 
Default model: `gpt-4o`
 1. Go to [aistudio.google.com/apikey](https://aistudio.google.com/apikey) 2. Sign in with your Google account 3. Click **Create API key** 4. Copy the key 
Default model: `gemini-2.0-flash`


:::note
New Google API keys may take a few minutes for quota to activate. If you get a quota error immediately after creating a key, wait a few minutes and try again.
:::
 1. Go to [console.mistral.ai/api-keys](https://console.mistral.ai/api-keys) 2. Sign up or log in 3. Click **Create new key** 4. Copy the key 
Default model: `mistral-large-latest`


:::tip
Mistral offers a generous free tier (1 billion tokens/month, no credit card required), making it a great option for trying Decodie.
:::
 1. Go to [console.x.ai](https://console.x.ai) 2. Sign up or log in 3. Create an API key 4. Copy the key (starts with `xai-`) 
Default model: `grok-3-mini`
 1. Go to [platform.deepseek.com/api_keys](https://platform.deepseek.com/api_keys) 2. Sign up or log in 3. Create an API key 4. Copy the key 
Default model: `deepseek-chat`

Configure your key

Section titled “Configure your key”

VS Code Extension and Local UI

Section titled “VS Code Extension and Local UI”

Create a .decodie/.env file in your project root:

Terminal window
mkdir -p .decodie
echo 'ANTHROPIC_API_KEY=sk-ant-api03-your-key-here' > .decodie/.env

Replace ANTHROPIC_API_KEY with the variable for your provider:

ProviderEnvironment variable
AnthropicANTHROPIC_API_KEY
OpenAIOPENAI_API_KEY
GoogleGOOGLE_GENERATIVE_AI_API_KEY
MistralMISTRAL_API_KEY
xAIXAI_API_KEY
DeepSeekDEEPSEEK_API_KEY

Override the default model

Section titled “Override the default model”

Each provider has a sensible default model. To use a different model, set the LLM_MODEL variable:

ANTHROPIC_API_KEY=sk-ant-api03-your-key-here
LLM_MODEL=claude-opus-4-6

In VS Code, you can also set this via the decodie.model setting.

Provider auto-detection

Section titled “Provider auto-detection”

Decodie automatically detects which provider to use based on which API key is present. If you have multiple keys in your .env file, the first match wins in this order:

  1. Anthropic
  2. OpenAI
  3. Google
  4. Mistral
  5. xAI
  6. DeepSeek

Backwards compatibility

Section titled “Backwards compatibility”

If you previously used CLAUDE_API_KEY, it still works and is treated as an Anthropic key. CLAUDE_CODE_OAUTH_TOKEN is no longer supported.