@deep-assistant/agent/MODELS.md

A minimal, public domain AI CLI agent compatible with OpenCode's JSON interface. Bun-only runtime.

# Models

This agent uses models from the [OpenCode Zen](https://opencode.ai/docs/zen/) subscription service. OpenCode Zen provides access to a wide variety of AI models through a unified API.

## Available Models

All models are accessed using the format `opencode/<model-id>`. Use the `--model` option to specify which model to use:

```bash
echo "hi" | agent --model opencode/grok-code
```

## OpenCode Zen Pricing

Below are the prices per 1M tokens for OpenCode Zen models. Models are sorted by output price (lowest first) for best pricing visibility.

| Model | Model ID | Input | Output | Cached Read | Cached Write |
|-------|----------|-------|--------|-------------|--------------|
| **Free Models (Output: $0.00)** |
| Grok Code Fast 1 | `opencode/grok-code` | Free | Free | Free | - |
| GPT 5 Nano | `opencode/gpt-5-nano` | Free | Free | Free | - |
| Big Pickle | `opencode/big-pickle` | Free | Free | Free | - |
| **Paid Models (sorted by output price)** |
| Qwen3 Coder 480B | `opencode/qwen3-coder-480b` | $0.45 | $1.50 | - | - |
| GLM 4.6 | `opencode/glm-4-6` | $0.60 | $2.20 | $0.10 | - |
| Kimi K2 | `opencode/kimi-k2` | $0.60 | $2.50 | $0.36 | - |
| Claude Haiku 3.5 | `opencode/claude-haiku-3-5` | $0.80 | $4.00 | $0.08 | $1.00 |
| Claude Haiku 4.5 | `opencode/haiku` | $1.00 | $5.00 | $0.10 | $1.25 |
| GPT 5.1 | `opencode/gpt-5-1` | $1.25 | $10.00 | $0.125 | - |
| GPT 5.1 Codex | `opencode/gpt-5-1-codex` | $1.25 | $10.00 | $0.125 | - |
| GPT 5 | `opencode/gpt-5` | $1.25 | $10.00 | $0.125 | - |
| GPT 5 Codex | `opencode/gpt-5-codex` | $1.25 | $10.00 | $0.125 | - |
| Gemini 3 Pro (≤ 200K tokens) | `opencode/gemini-3-pro` | $2.00 | $12.00 | $0.20 | - |
| Claude Sonnet 4.5 (≤ 200K tokens) | `opencode/sonnet` | $3.00 | $15.00 | $0.30 | $3.75 |
| Claude Sonnet 4 (≤ 200K tokens) | `opencode/claude-sonnet-4` | $3.00 | $15.00 | $0.30 | $3.75 |
| Gemini 3 Pro (> 200K tokens) | `opencode/gemini-3-pro` | $4.00 | $18.00 | $0.40 | - |
| Claude Sonnet 4.5 (> 200K tokens) | `opencode/sonnet` | $6.00 | $22.50 | $0.60 | $7.50 |
| Claude Sonnet 4 (> 200K tokens) | `opencode/claude-sonnet-4` | $6.00 | $22.50 | $0.60 | $7.50 |
| Claude Opus 4.1 | `opencode/opus` | $15.00 | $75.00 | $1.50 | $18.75 |

## Default Model

The default model is **Grok Code Fast 1** (`opencode/grok-code`), which is completely free. This model provides excellent performance for coding tasks with no cost.

## Usage Examples

### Using the Default Model (Free)

```bash
# Uses opencode/grok-code by default
echo "hello" | agent
```

### Using Other Free Models

```bash
# Big Pickle (free)
echo "hello" | agent --model opencode/big-pickle

# GPT 5 Nano (free)
echo "hello" | agent --model opencode/gpt-5-nano
```

### Using Paid Models

```bash
# Claude Sonnet 4.5 (best quality)
echo "hello" | agent --model opencode/sonnet

# Claude Haiku 4.5 (fast and affordable)
echo "hello" | agent --model opencode/haiku

# Claude Opus 4.1 (most capable)
echo "hello" | agent --model opencode/opus

# Gemini 3 Pro
echo "hello" | agent --model opencode/gemini-3-pro

# GPT 5.1
echo "hello" | agent --model opencode/gpt-5-1

# Qwen3 Coder (specialized for coding)
echo "hello" | agent --model opencode/qwen3-coder-480b
```

## More Information

For complete details about OpenCode Zen subscription and pricing, visit:
- [OpenCode Zen Documentation](https://opencode.ai/docs/zen/)
- [OpenCode Pricing](https://opencode.ai/pricing)

## Notes

- All prices are per 1 million tokens
- Cache pricing applies when using prompt caching features
- Token context limits vary by model
- Free models have no token costs but may have rate limits