[Bug] Anthropic API Error: Long context beta not available for subscription

Question

**Bug Description**
I have Claude Max, and it seems Opus now has 1M context. When I send prompts, I only get the following error:

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"The long context beta is not yet available for this
subscription."},"request_id":"req_011CZ3q8cr7YSHME5Zv2p7nr"}

Is my account not enabled for this? Can I not use the 1M context?

**Environment Info**
- Platform: darwin
- Terminal: alacritty
- Version: 2.1.76
- Feedback ID: 17663dcf-c9