Claude Sonnet 5.5 | BeatAPI API Documentation

Claude Sonnet 5.5 is available on BeatAPI under the exact model ID claude-sonnet-5-5. It supports coding and agent workflows with a 1M-token context window and up to 128K output tokens.

Model details

Setting	Value
Model ID	`claude-sonnet-5-5`
Context window	1,000,000 tokens
Maximum output	128,000 tokens
Default thinking	Adaptive
Billing	Actual token usage, settled in USD

Token pricing

Prices are USD per 1 million tokens, checked on September 30, 2026.

Token type	BeatAPI price
Input	$1.00
Output	$5.00
Cached input	$0.10
Cache write, 5 minutes	$1.25
Cache write, 1 hour	$2.00

These rates apply across the full 1M context window; there is no long-context premium. Cache rates apply when the corresponding cache usage is reported. Review the current price table before budgeting a workload.

Configuration example: Claude Code

Add these values to the env object in your Claude Code settings.json. Preserve existing settings, replace the key placeholder, and restart the client.

{
  "env": {
    "ANTHROPIC_BASE_URL": "https://api.beatapi.io",
    "ANTHROPIC_AUTH_TOKEN": "<BEATAPI_API_KEY>",
    "ANTHROPIC_MODEL": "claude-sonnet-5-5"
  }
}

The base URL has no /v1 suffix. Keep the client’s default adaptive thinking and tool configuration. See the complete Claude Code setup guide for installation, configuration, and common commands.

Account and usage

Use your BeatAPI key and account balance. Model availability follows the key’s enabled group and current capacity.

Dashboard usage logs show the request ID, model, token totals, status, and settled amount. Prices are based on the reported usage of completed requests.

Model specifications: Anthropic Sonnet 5.5 overview.