Claude Code: إعداد API واختيار النموذج

# Steps:
# 1. Visit https://console.anthropic.com/
# 2. Register/login to your account
# 3. Go to the API Keys page
# 4. Click "Create Key"
# 5. Copy the Key (format: sk-ant-api03-xxxxx)

# Temporary (current terminal only)
export ANTHROPIC_API_KEY="sk-ant-api03-xxxxx"

# Permanent (add to shell config)
echo 'export ANTHROPIC_API_KEY="sk-ant-api03-xxxxx"' >> ~/.zshrc
source ~/.zshrc

# Verify
echo $ANTHROPIC_API_KEY
# sk-ant-api03-xxxxx

# Specify model
claude --model claude-sonnet-4-20250514
claude --model claude-opus-4-20250514

# Or via environment variable
export CLAUDE_MODEL="claude-sonnet-4-20250514"

# Set DeepSeek API
export ANTHROPIC_API_KEY="your-deepseek-api-key"
export ANTHROPIC_BASE_URL="https://api.deepseek.com"

# Or use OpenAI compatible endpoint
export OPENAI_API_KEY="your-deepseek-api-key"
export OPENAI_BASE_URL="https://api.deepseek.com/v1"

# Alice uses DeepSeek to reduce costs

# 1. Get DeepSeek API Key
# Visit https://platform.deepseek.com/

# 2. Configure environment variables
export ANTHROPIC_API_KEY="sk-deepseek-xxxxx"
export ANTHROPIC_BASE_URL="https://api.deepseek.com"
export CLAUDE_MODEL="deepseek-chat"

# 3. Run Claude Code
claude "Help me refactor this function"

def estimate_monthly_cost(
    daily_sessions: int,
    avg_context_tokens: int,
    avg_output_tokens: int,
    model_input_price: float,
    model_output_price: float,
    working_days: int = 22
):
    daily_input = daily_sessions * avg_context_tokens
    daily_output = daily_sessions * avg_output_tokens
    monthly_input = daily_input * working_days
    monthly_output = daily_output * working_days

    cost = (
        monthly_input * model_input_price / 1_000_000
        + monthly_output * model_output_price / 1_000_000
    )
    return round(cost, 2)

# Sonnet plan
sonnet_cost = estimate_monthly_cost(
    daily_sessions=10,
    avg_context_tokens=50000,
    avg_output_tokens=5000,
    model_input_price=3,
    model_output_price=15
)
print(f"Sonnet monthly: ${sonnet_cost}")

# DeepSeek plan
deepseek_cost = estimate_monthly_cost(
    daily_sessions=10,
    avg_context_tokens=50000,
    avg_output_tokens=5000,
    model_input_price=0.27,
    model_output_price=1.1
)
print(f"DeepSeek monthly: ${deepseek_cost}")

Sonnet monthly: $46.2
DeepSeek monthly: $3.74

# Configure per project in .env files
# project-a/.env
ANTHROPIC_API_KEY=sk-ant-project-a-key
CLAUDE_MODEL=claude-sonnet-4-20250514

# project-b/.env
ANTHROPIC_API_KEY=sk-deepseek-key
ANTHROPIC_BASE_URL=https://api.deepseek.com
CLAUDE_MODEL=deepseek-chat

# Use direnv for auto-switching
# .envrc
source .env
export ANTHROPIC_API_KEY
export ANTHROPIC_BASE_URL
export CLAUDE_MODEL

# Check Anthropic API usage
curl https://api.anthropic.com/v1/usage \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01"

# Claude Code built-in stats
claude /cost
# Current session token usage: 125,430
# Estimated cost: $2.34

# Alice's cost optimization plan

# Core projects: Use Sonnet (quality first)
export PROJECT_CORE_API_KEY="sk-ant-api03-xxxxx"
export PROJECT_CORE_MODEL="claude-sonnet-4-20250514"

# Auxiliary projects: Use DeepSeek (cost first)
export PROJECT_AUX_API_KEY="sk-deepseek-xxxxx"
export PROJECT_AUX_BASE_URL="https://api.deepseek.com"
export PROJECT_AUX_MODEL="deepseek-chat"

# Configure in shell aliases
alias claude-core='ANTHROPIC_API_KEY=$PROJECT_CORE_API_KEY CLAUDE_MODEL=$PROJECT_CORE_MODEL claude'
alias claude-aux='ANTHROPIC_API_KEY=$PROJECT_AUX_API_KEY ANTHROPIC_BASE_URL=$PROJECT_AUX_BASE_URL CLAUDE_MODEL=$PROJECT_AUX_MODEL claude'

# Usage
cd core-project && claude-core "Refactor authentication module"
cd side-project && claude-aux "Add logging feature"