I'm using this

    deepseek() {
      unset ANTHROPIC_AUTH_TOKEN
      local -x ANTHROPIC_BASE_URL="https://api.deepseek.com/anthropic"
      local -x ANTHROPIC_AUTH_TOKEN="${DEEPSEEK_API_KEY}"
      local -x ANTHROPIC_MODEL="deepseek-v4-pro"
      local -x ANTHROPIC_SMALL_FAST_MODEL="deepseek-v4-flash"
      local -x API_TIMEOUT_MS=600000
      local -x CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1
      TMUX= command claude "$@"
    }