Claude Sonnet 4 6

Pricing

Leanroute's markup: $0. You pay the provider list price above, plus a flat $15/mo BYOK subscription (or 5% at top-up for prepaid credits). Compare pricing at /calculator.

Capabilities

Example request

curl https://api.leanroute.dev/v1/chat/completions \
  -H "Authorization: Bearer $LEANROUTE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-4-6",
    "messages": [
      { "role": "user", "content": "Hello, Claude Sonnet 4 6!" }
    ]
  }'

OpenAI-wire-compatible — point any OpenAI SDK at api.leanroute.dev/v1 and set model: "anthropic/claude-sonnet-4-6". Full endpoint reference at /docs/api.

Other Anthropic models

• Claude Haiku 4 5$1.00/$5.00 · Cheap + Fast
• Claude Opus 4 6$5.00/$25.00 · Premium Reasoning
• Claude Sonnet 5$2.00/$10.00 · Flagship
• Claude Opus 4 8$5.00/$25.00 · Premium Reasoning
• Claude Opus 4 7$5.00/$25.00 · Premium Reasoning
• Claude Opus 5$5.00/$25.00 · Premium Reasoning

Same-tier alternatives across providers

• GPT 4o$2.50/$10.00 · OpenAI
• GPT 5.6 Terra$2.50/$15.00 · OpenAI
• Claude Sonnet 5$2.00/$10.00 · Anthropic
• Gemini 2.5 Pro$1.25/$10.00 · Google
• Gemini 3.5 Flash$1.50/$9.00 · Google
• DeepSeek Chat$0.140/$0.280 · DeepSeek
• DeepSeek V4 Flash$0.140/$0.280 · DeepSeek
• Grok 4$3.00/$7.50 · xAI

Leanroute's router picks the cheapest same-tier model automatically when cheaper-model routing is on. Config at /dashboard/settings.