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claude-code - 💡(How to fix) Fix Opus 4.6 1M context window unavailable on Max plan — ongoing regression [1 participants]

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anthropics/claude-code#47822•Fetched 2026-04-15 06:41:20
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1M context window for claude-opus-4-6 is no longer available despite active Max subscription. /model opus[1m] returns "not available for your account." /context confirms 200k.

Root Cause

1M context window for claude-opus-4-6 is no longer available despite active Max subscription. /model opus[1m] returns "not available for your account." /context confirms 200k.

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Description

1M context window for claude-opus-4-6 is no longer available despite active Max subscription. /model opus[1m] returns "not available for your account." /context confirms 200k.

Environment

  • Product: Claude Code CLI
  • Model: claude-opus-4-6
  • Platform: Linux (WSL2)
  • Subscription: Max plan (active)

Related issues

  • #36584 (locked)
  • #34585
  • #26428

Expected behavior

1M context window should be available for Max plan subscribers as previously documented.

extent analysis

TL;DR

The 1M context window for claude-opus-4-6 may require a configuration or subscription validation check to resolve the availability issue.

Guidance

  • Verify the Max subscription status and ensure it is active, as the issue might be related to subscription validation.
  • Check the documentation for any updates on the 1M context window availability for the Max plan, as the expected behavior might have changed.
  • Review related issues #36584, #34585, and #26428 for potential workarounds or insights into similar problems.
  • Test the /model opus[1m] command with a different model or subscription plan to isolate the issue.

Notes

The issue might be specific to the claude-opus-4-6 model or the Max subscription plan, and further investigation is needed to determine the root cause.

Recommendation

Apply workaround: Check the related issues and documentation for potential solutions, as the issue might be related to a known problem or a change in the expected behavior.

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FAQ

Expected behavior

1M context window should be available for Max plan subscribers as previously documented.

#prompt issue#agent setup#task chaining#parallel task#integration issue

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