claude-haiku-4-5 — API, Pricing & Context Window | Vivgrid

claude-haiku-4-5 is Anthropic's fastest and most affordable current model, designed for high-volume, latency-sensitive workloads that still benefit from Claude's quality. It offers a 200K-token context window on the Messages API.

Vivgrid accelerates claude-haiku-4-5 across AMER and EMEA, making it an excellent default for real-time assistants and large-scale agent fleets.

Specifications

Pricing

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

Quick start

Call claude-haiku-4-5 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-haiku-4-5",
    "max_tokens": 1024,
    "messages": [
      { "role": "user", "content": "Say hello in English, Chinese and Spanish." }
    ],
    "stream": true
  }'

Ideal use cases

• Real-time chat and assistant experiences
• High-throughput classification and extraction
• Cost-sensitive tool-calling agents
• Fast first-pass steps in larger agent pipelines

Related models

• claude-sonnet-4-6 — a step up in capability
• claude-opus-4-7 — the frontier Opus model
• gpt-5-mini — comparable fast, low-cost option