> ## 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 is now available on BetterToken

> Claude Opus 5 is available on BetterToken as claude-opus-5 for complex coding, long-running agent workflows, and context windows up to 1M tokens.

Release date: July 24, 2026

BetterToken now supports `claude-opus-5`. The model is designed for complex coding, long-running agent workflows, and multi-step work across large codebases. To connect it, create a BetterToken API Key, select the `Claude` provider, use `https://www.bettertoken.ai` as the Base URL, and select `claude-opus-5` as the model ID.

Always check the <a href={"https://bettertoken.ai/pricing"}>model plaza</a> for current availability and pricing.

## Highlights

* **Complex coding workloads**: Anthropic recommends Opus 5 for complex agentic coding and professional work where quality and long-horizon reliability matter
* **Up to `1M tokens` of context**: The model can work with large repositories, long histories, and extensive source material
* **Up to `128K tokens` of output**: This supports large code changes, reports, and multi-step deliverables
* **Adaptive thinking by default**: The model adjusts its reasoning depth to the task
* **Expanded effort control**: Supported effort levels are `low`, `medium`, `high`, `xhigh`, and `max`

## How to connect

1. <a href={"https://bettertoken.ai/register"}>Register and create a BetterToken API Key</a>, then select the `Claude` provider.
2. Set the Base URL to `https://www.bettertoken.ai`.
3. Select `claude-opus-5` as the model.
4. Follow the [Claude Code setup guide](/en/ai-tools/claude-code). To manage multiple providers, use the [CC Switch guide](/en/ai-tools/cc-switch).

If you are choosing a model for a specific workload, compare Opus 5 with other options in the [model selection guide](/en/faq/model-calling/model-selection-guide).

## What to check when moving from Opus 4.8

For most configurations, you can replace `claude-opus-4-8` with `claude-opus-5`. Review these two behavior changes:

* **Thinking is enabled by default**. If effort is set to `xhigh` or `max`, disabling thinking returns a `400` error.
* **`max_tokens` covers thinking and visible output**. Leave enough headroom for tasks that require long reasoning and a large final response.

<Tip>
  Start with a real task from your workflow, such as repository analysis, a multi-file change, or a long-running agent task. This makes it easier to assess quality, latency, and token usage before switching more workloads.
</Tip>

## Official sources

* [Claude Platform release notes](https://platform.claude.com/docs/en/release-notes/overview)
* [Models overview](https://platform.claude.com/docs/en/about-claude/models/overview)
* [Migration guide](https://platform.claude.com/docs/en/about-claude/models/migration-guide)