# claude-sonnet-5 — API, Pricing & Context Window

claude-sonnet-5 on Vivgrid: Anthropic's latest Sonnet model with a 1M-token context window, Messages API, and geo-distributed acceleration.

`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

|     |     |
| --- | --- |
| **Provider** | Anthropic |
| **Model ID** | `claude-sonnet-5` |
| **Best for** | Coding |
| **Context window** | 1,000,000 tokens |
| **Max output** | 128,000 tokens |
| **Modalities** | Text, Image |
| **Tool / function calling** | Yes |
| **Knowledge cutoff** | 2026-01 |
| **Acceleration** | ⚡ Geo-Distributed — AMER, EMEA, APAC |

## Pricing

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

| Input | Cached input | Output |
| --- | --- | --- |
| $2.00 | $0.20 | $10.00 |

## Quick start

Call `claude-sonnet-5` through Vivgrid's unified, OpenAI-compatible endpoint. Get an API key from the [Vivgrid Console](https://console.vivgrid.com/).

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

## 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](/content/docs/models/claude-opus-4-8/index.html) — the frontier Opus model
- [claude-sonnet-4-6](/content/docs/models/claude-sonnet-4-6/index.html) — the prior Sonnet release
- [claude-haiku-4-5](/content/docs/models/claude-haiku-4-5/index.html) — the fastest, cheapest Claude