## Provider Configuration

```bash
# Required: DeepSeek provider settings
export ANTHROPIC_BASE_URL=https://api.deepseek.com/v1
export ANTHROPIC_API_KEY=sk-your-deepseek-key
```

## Settings File

```json
{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.deepseek.com/v1",
    "ANTHROPIC_API_KEY": "sk-your-deepseek-key"
  },
  "preferences": {
    "model": "deepseek-chat"
  }
}
```

## Available Models

| Model | ID | Best For |
|-------|----|----------|
| DeepSeek V3 | `deepseek-chat` | General coding, fast responses |
| DeepSeek R1 | `deepseek-reasoner` | Complex reasoning, math, algorithms |

## Setup

1. Create an account at https://platform.deepseek.com
2. Generate an API key from the dashboard
3. Add credits to your account
4. Replace `sk-your-deepseek-key` with your actual key

## Pricing Comparison

| Model | Input (per 1M) | Output (per 1M) |
|-------|----------------|------------------|
| DeepSeek V3 | $0.27 | $1.10 |
| DeepSeek R1 | $0.55 | $2.19 |

*Pricing as of early 2026. Check platform.deepseek.com for current rates.*

## Limitations

- **Not a drop-in replacement**: Some Claude Code features may work differently
- **Tool use**: DeepSeek's tool/function calling may differ from Claude's native format
- **Context window**: DeepSeek V3 supports 64K tokens (vs Claude's 200K)
- **Streaming**: Supported but may have different chunking behavior

## When to Use DeepSeek

- Cost-sensitive development and prototyping
- Bulk code generation tasks
- Simple refactoring and formatting
- Algorithm implementation and math-heavy tasks (R1)

## Troubleshooting

| Issue | Solution |
|-------|----------|
| `Invalid API key` | Verify key at platform.deepseek.com |
| Unexpected responses | Some Claude Code prompts may need model-specific tuning |
| Rate limits | DeepSeek has lower default rate limits - check your tier |

Configure Claude Code to use DeepSeek's API as an alternative model provider. Access DeepSeek V3 and reasoning models for cost-effective coding tasks, with pricing significantly lower than most providers.

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Model	ID	Best For
DeepSeek V3	`deepseek-chat`	General coding, fast responses
DeepSeek R1	`deepseek-reasoner`	Complex reasoning, math, algorithms

Issue	Solution
`Invalid API key`	Verify key at platform.deepseek.com
Unexpected responses	Some Claude Code prompts may need model-specific tuning
Rate limits	DeepSeek has lower default rate limits - check your tier