> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bettertoken.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Claude Opus 5.5 is now available on BetterToken

> Claude Opus 5.5 is available on BetterToken as claude-opus-5-5 for complex coding, long-running agents, professional work, and repeated-context workflows.

Release date: September 22, 2026

Anthropic introduces Claude Opus 5.5 as the first model in the Claude 5.5 family. Anthropic reports improvements over Opus 5 on long-running coding and professional work, with clearer communication across extended sessions.

**Claude Opus 5.5** is now available on BetterToken. Select the `Claude` provider, set the Base URL to `https://bettertoken.ai`, and use `claude-opus-5-5` as the model ID. Check the <a href={"https://bettertoken.ai/pricing"}>model plaza</a> for current availability and pricing.

## Highlights

* **Long-running coding agents**: use it for complex repository changes, audits, and multi-step work.
* **Production-oriented work**: Anthropic recommends it for production-ready code, complex documents, and computer use.
* **Clearer collaboration**: Anthropic reports more direct, easier-to-follow explanations than Opus 5 in long sessions.

## Connect it

1. <a href={"https://bettertoken.ai/register"}>Create a BetterToken API Key</a>.
2. Select the `Claude` provider and use `https://bettertoken.ai` as the Base URL.
3. Set the model ID to `claude-opus-5-5`.
4. Test a representative task before moving production traffic.

Use the [Claude Code setup guide](/en/ai-tools/claude-code) for client setup, or compare alternatives in the [model selection guide](/en/faq/model-calling/model-selection-guide).

## Official sources

* [Introducing Claude Opus 5.5](https://www.anthropic.com/claude-opus-5-5)
* [Claude Opus](https://www.anthropic.com/claude/opus)