claude-sonnet-5 — API, Pricing & Context Window | Vivgrid

claude-sonnet-5 is Anthropic's latest Sonnet model, delivering near-Opus coding and reasoning quality at a fraction of the price and higher speed. With a 1M-token context window and lower rates than claude-sonnet-4-6, it's the new default workhorse for production agents.

On Vivgrid, claude-sonnet-5 is geo-distributed across AMER, EMEA, and APAC and reachable on the Messages API through the same unified key as the rest of the catalog.

Specifications

Pricing

Pricing in USD per 1M tokens, matching the provider's rates.

Quick start

Call claude-sonnet-5 through Vivgrid's unified, OpenAI-compatible endpoint. Get an API key from the Vivgrid Console.

curl https://api.vivgrid.com/v1/messages \
  -H "Authorization: Bearer $VIVGRID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-5",
    "max_tokens": 1024,
    "messages": [
      { "role": "user", "content": "Say hello in English, Chinese and Spanish." }
    ],
    "stream": true
  }'

Ideal use cases

• Everyday coding agents balancing quality, speed, and cost
• High-volume reasoning and content workflows
• Long-context analysis within a 1M-token budget
• Production assistants needing reliable tool use

Related models

• claude-opus-4-8 — the frontier Opus model
• claude-sonnet-4-6 — the prior Sonnet release
• claude-haiku-4-5 — the fastest, cheapest Claude