Anthropic API
To meet the demand for using the Anthropic API ecosystem, our API has added support for the Anthropic API format, with the base_url being https://api.deepseek.com/anthropic.
With simple configuration, you can integrate the capabilities of DeepSeek into the Anthropic API ecosystem.
Use DeepSeek in Claude Code
Please refer to Integrate with AI Tools.
Invoke DeepSeek Model via Anthropic API
- Install Anthropic SDK
pip install anthropic
- Config Environment Variables
export ANTHROPIC_BASE_URL=https://api.deepseek.com/anthropic
export ANTHROPIC_API_KEY=${YOUR_API_KEY}
- Invoke the API
import anthropic
client = anthropic.Anthropic()
message = client.messages.create(
model="deepseek-v4-pro",
max_tokens=1000,
system="You are a helpful assistant.",
messages=[
{
"role": "user",
"content": [
{
"type": "text",
"text": "Hi, how are you?"
}
]
}
]
)
print(message.content)
Note: When you pass an unsupported model name to DeepSeek's Anthropic API, the API backend will automatically map it to the deepseek-v4-flash model.
Anthropic API Compatibility Details
HTTP Header
| Field | Support Status |
|---|---|
| anthropic-beta | Ignored |
| anthropic-version | Ignored |
| x-api-key | Fully Supported |
Simple Fields
| Field | Support Status |
|---|---|
| model | Use DeepSeek Model Instead |
| max_tokens | Fully Supported |
| container | Ignored |
| mcp_servers | Ignored |
| metadata | Ignored |
| service_tier | Ignored |
| stop_sequences | Fully Supported |
| stream | Fully Supported |
| system | Fully Supported |
| temperature | Fully Supported (range [0.0 ~ 2.0]) |
| thinking | Supported (budget_tokens is ignored) |
| output_config | Only effort is supported |
| top_k | Ignored |
| top_p | Fully Supported |
Tool Fields
tools
| Field | Support Status |
|---|---|
| name | Fully Supported |
| input_schema | Fully Supported |
| description | Fully Supported |
| cache_control | Ignored |
tool_choice
| Value | Support Status |
|---|---|
| none | Fully Supported |
| auto | Supported (disable_parallel_tool_use is ignored) |
| any | Supported (disable_parallel_tool_use is ignored) |
| tool | Supported (disable_parallel_tool_use is ignored) |
Message Fields
| Field | Variant | Sub-Field | Support Status |
|---|---|---|---|
| content | string | Fully Supported | |
| array, type="text" | text | Fully Supported | |
| cache_control | Ignored | ||
| citations | Ignored | ||
| array, type="image" | Not Supported | ||
| array, type = "document" | Not Supported | ||
| array, type = "search_result" | Not Supported | ||
| array, type = "thinking" | Supported | ||
| array, type="redacted_thinking" | Not Supported | ||
| array, type = "tool_use" | id | Fully Supported | |
| input | Fully Supported | ||
| name | Fully Supported | ||
| cache_control | Ignored | ||
| array, type = "tool_result" | tool_use_id | Fully Supported | |
| content | Fully Supported | ||
| cache_control | Ignored | ||
| is_error | Ignored | ||
| array, type = "server_tool_use" | Not Supported | ||
| array, type = "web_search_tool_result" | Not Supported | ||
| array, type = "code_execution_tool_result" | Not Supported | ||
| array, type = "mcp_tool_use" | Not Supported | ||
| array, type = "mcp_tool_result" | Not Supported | ||
| array, type = "container_upload" | Not Supported |