claude-sonnet-4-6 — API, Pricing & Context Window | Vivgrid

claude-sonnet-4-6 is Anthropic's balanced Sonnet model, offering much of Opus's coding and reasoning quality at a lower price and faster speed. Its 1M-token context window makes it a versatile workhorse for production agents.

On Vivgrid, claude-sonnet-4-6 is geo-distributed across AMER and EMEA 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.

What one request costs

The rates above applied to a 20K-token prompt with a 2K-token reply — a typical single agent turn, small enough that every request is billed at the base rate.

API surfaces

The Vivgrid Console catalogs claude-sonnet-4-6 on 2 surfaces, all behind the same API key. The endpoint shown is the one the Console previews for that surface.

Quick start

Get an API key from the Vivgrid Console, then call claude-sonnet-4-6 directly.

curl https://api.vivgrid.com/v1/chat/completions \
  -H "Authorization: Bearer $VIVGRID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "messages": [
      { "role": "user", "content": "Say hello in English, Chinese and Spanish." }
    ],
    "stream": true
  }'

curl https://api.vivgrid.com/v1/messages \
  -H "Authorization: Bearer $VIVGRID_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "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

• gpt-6-astra — OpenAI's frontier gpt-6 coding model
• claude-sonnet-5-5 — the latest Sonnet release
• claude-opus-5-5 — the latest frontier Opus model