claude-openrouter-deepseek-v4-flash

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

• Create an OpenRouter account.
• Generate an API key ( sk-or-v1-...

). - Add credits if you're using paid models.

Add the following environment variables to your ~/.zshrc

or ~/.bashrc

:

export OPENROUTER_API_KEY="sk-or-v1-..."

export ANTHROPIC_BASE_URL="https://openrouter.ai/api"
export ANTHROPIC_AUTH_TOKEN="$OPENROUTER_API_KEY"
export ANTHROPIC_API_KEY=""

Restart your terminal after saving the changes.

export ANTHROPIC_DEFAULT_HAIKU_MODEL="deepseek/deepseek-v4-flash"
export ANTHROPIC_DEFAULT_SONNET_MODEL="deepseek/deepseek-v4-flash"
export ANTHROPIC_DEFAULT_OPUS_MODEL="deepseek/deepseek-v4-flash"

(Optional) Configure Claude Code sub-agents to use the same model:

export CLAUDE_CODE_SUBAGENT_MODEL="deepseek/deepseek-v4-flash"

If you've previously logged into Claude Code using Anthropic, run:

/logout

Then restart Claude Code to avoid authentication conflicts.

Start Claude Code:

claude

Inside Claude Code, run:

/status

Verify that:

Anthropic Base URL ishttps://openrouter.ai/api

Auth Token isANTHROPIC_AUTH_TOKEN

Finally, send a prompt and open the OpenRouter Activity dashboard to confirm the request is being processed by:

deepseek/deepseek-v4-flash