# Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled)

Canonical page: https://agentsky.dev/models/anthropic/claude-sonnet-5-5-anthropic-enterprise
JSON record: https://gateway.agentsky.dev/v1/models/anthropic/claude-sonnet-5-5-anthropic-enterprise

Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled) is a text and image-input model by Anthropic, available through the AgentSky API as anthropic/claude-sonnet-5-5-anthropic-enterprise at $1.65 per million input tokens and $8.25 per million output tokens, with a 1M context window.

Dedicated Anthropic Enterprise Fast / Distilled resource. This resource uses an independent supplier route and does not fall back to other resources.

## Facts

- **Model id:** `anthropic/claude-sonnet-5-5-anthropic-enterprise`
- **Maker:** Anthropic
- **Input modalities:** Text, Image
- **Context:** 1M
- **Max output tokens:** 128,000
- **Released:** Sep 28, 2026
- **Aliases:** `anthropic/claude-sonnet-5-5-anthropic-enterprise`, `claude-sonnet-5-5-anthropic-enterprise`

## Pricing

USD per million tokens on the default plan. Signed-in pages show your own plan's price; every response carries the cost of that call in `usage.cost`.

| Input context (tokens) | Cache mode | Thinking | Input | Output | Cache read | Cache write |
|---|---|---|---|---|---|---|
| Up to 1,000,000 | default | default | $1.65 | $8.25 | $0.0825 | $2.0625 |

## Use it

Anthropic wire base URL: `https://gateway.agentsky.dev`. OpenAI wire base URL: `https://gateway.agentsky.dev/v1`. Authenticate with an AgentSky API key (`ast_…`) and pass the model id.

### Anthropic SDK

```js
import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  baseURL: "https://gateway.agentsky.dev",
  apiKey: process.env.AGENTSKY_API_KEY, // ast_…
});

const message = await client.messages.create({
  model: "anthropic/claude-sonnet-5-5-anthropic-enterprise",
  max_tokens: 256,
  messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(message.usage.cost); // USD, in the response
```

## Questions

### What is Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled)?

Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled) is a model from Anthropic. Dedicated Anthropic Enterprise Fast / Distilled resource. This resource uses an independent supplier route and does not fall back to other resources.

### How much does Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled) cost?

$1.65 / $8.25 per million tokens at the prices shown, for input and output respectively. The exact price of every call comes back in the response as usage.cost, so you never have to compute it.

### What is the context length of Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled)?

1M tokens, and it writes up to 128K tokens in one reply. These are the limits listed for this model in the current AgentSky catalog.

### Which clients can call Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled)?

Anything that speaks the Anthropic Messages API, which covers the Anthropic SDK and Claude Code. Point the client's base URL at the gateway, use an AgentSky key, and pass anthropic/claude-sonnet-5-5-anthropic-enterprise as the model.

### How do I name Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled) in a request?

The gateway accepts anthropic/claude-sonnet-5-5-anthropic-enterprise, claude-sonnet-5-5-anthropic-enterprise. Any of them resolves to the same model, so an existing integration usually needs no change to its model string.

### Can Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled) read images?

Yes. Its listed input types are text, image. Include the image with your request; image input does not imply image generation.

### What output can Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled) produce?

The listed output types are text. This model returns text. Producing image, video or audio files requires a suitable tool or another model; it is not included in text generation.

### How should I plan a long prompt for Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled)?

Plan your instructions, conversation history and source material around the 1M-token context limit, leaving room for the response. The listed response ceiling is 128K tokens. A larger window lets you supply more relevant material; it does not make unrelated content useful.

### What would 10,000 input tokens and 2,000 output tokens cost with Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled)?

At the displayed input and output rates, the model-token subtotal is $0.033. This example assumes uncached input and excludes additional pricing categories, tool calls and agent runtime. Actual usage determines the final charge.

### How is cached input priced for Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled)?

The catalog lists $0.0825 per million cache-read tokens. Cache writes are listed at $2.0625 per million tokens. Repeating a prompt does not by itself guarantee a cache hit; only usage reported as cached receives that rate.

### Does the Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled) token price cover an entire agent task?

No. The model price covers the model usage described above. A task can also incur tool and runtime charges, and several model calls may be needed to complete it. Compare total task usage when evaluating cost.

### How do I use Claude Sonnet 5.5 (Anthropic Enterprise Fast / Distilled) on AgentSky?

This model is listed for API use. Use the model ID anthropic/claude-sonnet-5-5-anthropic-enterprise with a supported gateway operation. The agent composer is not offered here because the current agent model menu has no compatible match.