opencode-swisscomgpt

SwisscomGPT provider for OpenCode - Access GPT-3.5, GPT-4, and GPT-5 via Swisscom's internal AI platform.

Features

- 🚀 Access to GPT-5 and other models via Swisscom's GPU cluster
- 🔐 JWT-based authentication via gpt.swisscom.com
- 🔄 Full streaming support (SSE)
- 🛠️ Easy integration with OpenCode

Installation

$3

``bash
npm install opencode-swisscomgpt


or


bun add opencode-swisscomgpt
`

$3

`bash


Clone and build

git clone https://github.com/mac-110/opencode-swisscomgpt.git
cd opencode-swisscomgpt
bun install
bun run build

Install in OpenCode's config directory

cd ~/.config/opencode
bun add /path/to/opencode-swisscomgpt
`

Prerequisites

You need a Swisscom employee account to use this provider.

$3

1. Log in to gpt.swisscom.com
2. Open Browser DevTools (F12)
3. Go to the Network tab
4. Reload the page or make any request
5. Find a fetch request and look at the Headers tab
6. Copy the token from the Authorization: Bearer header

Configuration

$3

`bash
export SWISSCOMGPT_API_KEY="your-jwt-token"

Or add to ~/.zshrc / ~/.bashrc for persistence


echo 'export SWISSCOMGPT_API_KEY="your-jwt-token"' >> ~/.zshrc
`

$3

Add the provider to your ~/.config/opencode/opencode.json:

`json
{
"provider": {
"swisscomgpt": {
"npm": "opencode-swisscomgpt",
"env": ["SWISSCOMGPT_API_KEY"],
"options": {
"baseURL": "https://api.rastro.icp.swisscom.com"
},
"models": {
"gpt-5": {
"name": "GPT-5",
"id": "gpt-5",
"attachment": true,
"tool_call": true,
"temperature": true,
"cost": { "input": 0, "output": 0 },
"limit": { "context": 128000, "output": 16384 },
"modalities": { "input": ["text"], "output": ["text"] }
},
"gpt-5-instant": {
"name": "GPT-5 Instant",
"id": "gpt-5-instant",
"attachment": true,
"tool_call": true,
"temperature": true,
"cost": { "input": 0, "output": 0 },
"limit": { "context": 128000, "output": 16384 },
"modalities": { "input": ["text"], "output": ["text"] }
},
"gpt-5-thinking": {
"name": "GPT-5 Thinking",
"id": "gpt-5-thinking",
"reasoning": true,
"attachment": true,
"tool_call": true,
"temperature": true,
"cost": { "input": 0, "output": 0 },
"limit": { "context": 128000, "output": 32768 },
"modalities": { "input": ["text"], "output": ["text"] }
},
"gpt-4-turbo": {
"name": "GPT-4 Turbo",
"id": "gpt-4-turbo",
"attachment": true,
"tool_call": true,
"temperature": true,
"cost": { "input": 0, "output": 0 },
"limit": { "context": 128000, "output": 4096 },
"modalities": { "input": ["text"], "output": ["text"] }
}
}
}
},
"model": "swisscomgpt/gpt-5",
"small_model": "swisscomgpt/gpt-4-turbo"
}
`

> Important: OpenCode requires explicit model definitions in the models object. Each model you want to use must be defined with its capabilities and limits.

$3

| Field | Type | Description |
|-------|------|-------------|
| name | string | Display name in OpenCode |
| id | string | API model identifier |
| tool_call | boolean | Supports function calling |
| reasoning | boolean | Model has reasoning/thinking capability |
| attachment | boolean | Supports file attachments |
| temperature | boolean | Supports temperature parameter |
| cost.input | number | Cost per 1M input tokens (USD) |
| cost.output | number | Cost per 1M output tokens (USD) |
| limit.context | number | Max context window size |
| limit.output | number | Max output tokens |
| modalities.input | array | Supported input types: text, image, audio |
| modalities.output | array | Supported output types: text, image, audio |

Available Models

$3


| Model ID | Description |
|----------|-------------|
| gpt-5 | Default GPT-5 model |
| gpt-5-instant | ⚡ Fastest replies, no deep thought |
| gpt-5-thinking-mini | 💡 Light, efficient reasoning |
| gpt-5-thinking | 🧠 Slower, more detailed reasoning |

$3

| Model ID | Description |
|----------|-------------|
| gpt-4o | Great for general tasks |
| gpt-4o-mini | Faster for simple tasks |
| gpt-4-turbo | High performance |
| gpt-4.1 | Optimized for coding |

$3

| Model ID | Description |
|----------|-------------|
| o3 | Advanced reasoning model |
| o3-mini | Fast reasoning model |

$3

| Model ID | Description |
|----------|-------------|
| claude-3.5-sonnet | Great for creative writing and code |

$3

| Model ID | Description |
|----------|-------------|
| apertus | Swiss-trained open model |
| llama-4-scout | Large context model |

Usage with OpenCode

`bash


Verify models are available

opencode models swisscomgpt

Start OpenCode (uses configured default model)

opencode

Switch model in session

/model swisscomgpt/gpt-5-thinking
`

Programmatic Usage

You can also use this provider directly in your code:

`typescript
import { createSwisscomGPT } from 'opencode-swisscomgpt';
import { generateText } from 'ai';

const swisscomgpt = createSwisscomGPT({
apiKey: process.env.SWISSCOMGPT_API_KEY!,
});

const { text } = await generateText({
model: swisscomgpt('gpt-5'),
prompt: 'Explain quantum computing in simple terms.',
});

console.log(text);
`

$3

`typescript
import { createSwisscomGPT } from 'opencode-swisscomgpt';
import { streamText } from 'ai';

const swisscomgpt = createSwisscomGPT({
apiKey: process.env.SWISSCOMGPT_API_KEY!,
});

const result = await streamText({
model: swisscomgpt('gpt-5'),
prompt: 'Write a short story about AI.',
});

for await (const chunk of result.textStream) {
process.stdout.write(chunk);
}
`

API Reference

$3

Creates a SwisscomGPT provider instance compatible with Vercel AI SDK.

#### Config Options

| Option | Type | Default | Description |
|--------|------|---------|-------------|
| apiKey | string | required | JWT Bearer token from gpt.swisscom.com |
| baseURL | string | https://api.rastro.icp.swisscom.com | API base URL |
| threadId | string | auto-generated | UUID for conversation continuity |
| policy | string | SKIP | API policy parameter |

How It Works

This provider wraps @ai-sdk/openai-compatible and transforms requests for SwisscomGPT's API:

1. URL Transformation: /v1/chat/completions → /v2/chat/completions/{threadId}?policy=SKIP
2. Authentication: Uses JWT Bearer token in Authorization header
3. Thread ID: Auto-generates UUID per request for conversation tracking

Troubleshooting

$3

1. Make sure the package is installed in ~/.config/opencode/node_modules/
2. Verify your opencode.json has explicit model definitions
3. Check that the package is built (dist/` folder exists)

$3

JWT tokens from gpt.swisscom.com expire after ~24h. Get a fresh token from the browser.

$3

Make sure you're connected to the Swisscom network (VPN if remote).

Security Notes

- Never commit your JWT token to version control
- Use environment variables for the API key
- Tokens are tied to your personal Swisscom account

Contributing

Contributions welcome! Please read our Contributing Guide.

License

MIT © Swisscom / Alexander Schäfer

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Made with ❤️ for Swisscom developers