Sonnet 4.6 1M context unavailable on Max 20x plan - only Opus 1M appears in /model

## What's wrong On Claude Max 20x plan ($200/month), `/model` only shows **Opus 4.6 (1M context)** as the default model. There is **no option to select Sonnet 4.6 with 1M context**. This forces Max users to consume expensive Opus tokens for all work, even when Sonnet would be sufficient. Per the [1M context GA blog post](https://claude.com/blog/1m-context-ga) (March 13, 2026), both Opus 4.6 and Sonnet 4.6 should have 1M context available on Max plans at standard pricing. ## Environment - **Claude Code**: v2.1.76 (latest) - **Plan**: Claude Max 20x ($200/month) - **OS**: macOS (Darwin 25.1.0) - **Shell**: zsh ## Steps to reproduce 1. Start a fresh Claude Code session: `claude` 2. Run `/model` - only shows "Opus 4.6 (1M context) (default)", no Sonnet 1M option 3. Run `/login` to re-authenticate - no change 4. Switch to Haiku via `/model`, then `/model` again - Sonnet 1M still does not appear ## What I tried (all failed) - `/login` to refresh auth tokens - Toggling through models via `/model` (Haiku workaround from #34143) - `claude --model sonnet` - launches but without 1M context - Verified **none** of the known blocking env vars are set: - `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC` - not set - `DISABLE_TELEMETRY` - not set - `DISABLE_ERROR_REPORTING` - not set - `DISABLE_NON_ESSENTIAL_MODEL_CALLS` - not set ## Expected behavior `/model` should offer Sonnet 4.6 (1M context) as a selectable option on Max 20x plans, alongside Opus 4.6 (1M context). ## Impact

Posted by thomassauve26 on Mar 15, 2026, 10:40 PM

Tags

• pricing (Other)

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