[Bug] Anthropic API Error: Long context beta unavailable for Max plan with Claude Opus 4.6 1M

[evandro-macedo]

Bug Description
Max plan subscriber getting "The long context beta is not yet available for this subscription" error when using /model claude-opus-4-6[1m]. Opus 4.6 1M context was announced today (Feb 5, 2026) and should be available on Max plans. Same issue previously reported for Sonnet in GitHub issues #6871, #10219, #15057. Request ID: req_011CXrwxYTxjy3wbnMqsZn4N

Environment Info

• Platform: linux
• Terminal: ghostty
• Version: 2.1.34
• Feedback ID: a887216d-a564-4bb1-b9a8-a4017a730aa9

Errors

[{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAuTbsPs5cceh1sq6k\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.718Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAuao1HEuSvxrRaH3t\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.720Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAucmwe2R9aNuryod6\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.730Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAucHHHUMzXw4Zmsrp\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.733Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAuTMZrPESmPYywhEi\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.736Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAua3jvKtQ5YqDB6Di\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.741Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAuZocTXLBbYqLdAAZ\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.741Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAuY4pA7ERGcQtyHWZ\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.743Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAuZJaDJ86q2TXsFJK\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-02-06T14:12:20.746Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"The long context beta is not yet available for this subscription.\"},\"request_id\":\"req_011CXrxAucn4YqqptSAW9ARw\"}\n    at generate (/$bunfs/root/claude:316:8796)\n    at makeRequest (/$bunfs/root/claude:333:5435)\n    at…

Note: Content was truncated.

[github-actions]

Found 3 possible duplicate issues:

1. [BUG] Opus 4.6 with [1m] context window returns "long context beta not available" on Max subscription #23472
2. Long Context Beta Not Available for Current Subscription #6871
3. [BUG] Sonnet 1M context window unavailable on Max 20x subscription - regression from ~2 weeks ago #15057

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🤖 Generated with Claude Code

[ersaayan]

ı got same error

[daniel-kim-9way]

Same issue here. Max 20x subscriber, Claude Code latest version.

• Model: claude-opus-4-6[1m]

• Error: "The long context beta is not yet available for this subscription."

• Request ID: req_011CY5H1nsEiaoqCwhTfd2H3

• Platform: Windows WSL

• Claude Code version: 2.1.41

Contacted Anthropic support — they confirmed the feature is in "limited beta" even within Max 20x, and couldn't enable it or provide a timeline. Escalated to human support, waiting for response.

At minimum, the [1m] model option should be hidden from the selector for users without access. Showing it and returning an error is misleading.

[Ultimatrixman]

On the Max plan. It was working yesterday, now it doesn't. They removed it mid-session.