Use DeepSeek in Claude Code

To meet the demand for using the Anthropic API ecosystem, our API has added support for the Anthropic API format. With simple configuration, you can integrate the capabilities of DeepSeek into the Anthropic API ecosystem.

Use DeepSeek in Claude Code

Install Claude Code

npm install -g @anthropic-ai/claude-code

Config Environment Variables

export ANTHROPIC_BASE_URL=https://api.deepseek.com/anthropic
export ANTHROPIC_AUTH_TOKEN=${YOUR_API_KEY}
export API_TIMEOUT_MS=600000
export ANTHROPIC_MODEL=deepseek-chat
export ANTHROPIC_SMALL_FAST_MODEL=deepseek-chat
export CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1

Note: The API_TIMEOUT_MS parameter is configured to prevent excessively long outputs that could cause the Claude Code client to time out. Here, we set the timeout duration to 10 minutes.

Enter the Project Directory, and Execute Claude Code

cd my-project
claude

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=${DEEPSEEK_API_KEY}

Invoke the API

import anthropic

client = anthropic.Anthropic()

message = client.messages.create(
    model="deepseek-chat",
    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-chat 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	Ignored
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”		Ignored
	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