claude-code-1m-context-availability

Purpose

This document clarifies whether Claude Opus 4.6 with the 1M token context window is available to Claude Code users with Claude Pro, Max, Teams, or Enterprise subscriptions.

Direct Answer

No — Claude Opus 4.6’s 1M token context window is NOT available for Claude Code subscription users at launch (as of February 6, 2026).

According to the official Claude Code documentation:

For Opus 4.6, the 1M context window is available for API and Claude Code pay-as-you-go users. Pro, Max, Teams, and Enterprise subscription users do not have access to Opus 4.6 1M context at launch.

Key Details

What IS Available to Subscription Users

Claude Code subscription users (Pro, Max, Teams, Enterprise) can:

Access Opus 4.6 with the standard context window (200K tokens)
Use Sonnet 4.5 with 1M context window via the sonnet[1m] model alias
Switch between models using /model command or configure defaults
Use adaptive thinking controls (effort levels) with Opus 4.6

Model Access by Subscription

Subscription	Opus 4.6 (Standard 200K)	Opus 4.6 (1M Context)	Sonnet (1M Context)
Pro	✅ Yes	❌ No (at launch)	✅ Yes
Max	✅ Yes	❌ No (at launch)	✅ Yes
Teams	✅ Yes	❌ No (at launch)	✅ Yes
Enterprise	✅ Yes	❌ No (at launch)	✅ Yes
Pay-as-you-go	✅ Yes	✅ Yes	✅ Yes

Pricing

Opus 4.6 (standard): 25 per million input/output tokens
Opus 4.6 (1M context): 37.50 per million input/output tokens (premium pricing)
Sonnet 4.5 (1M context): Premium pricing applies

Alternatives for Subscription Users

If you need 1M context capability now with a Claude Code subscription:

Use Sonnet 4.5 with 1M context — available today to all subscription users
- Configure via /model sonnet[1m] in Claude Code
- Excellent performance for coding tasks (84% on BrowseComp)
- Lower cost than Opus premium pricing
Upgrade to pay-as-you-go — get Opus 4.6 with 1M context
- Purchase credits directly via API or Claude Code
- Pay per token used instead of flat monthly fee
- Useful if you have variable usage patterns
Monitor for updates — Anthropic may expand access to 1M context
- Current restriction is “at launch” (Feb 5-6, 2026)
- Enterprise customers may get access sooner
- Watch announcements at https://www.anthropic.com

Why This Limitation?

The 1M context window has premium pricing (37.50 vs 25 standard rates). Subscription users currently pay a flat monthly fee, so Anthropic is:

Gradually rolling out 1M access to manage infrastructure load
Likely to expand availability over time
Prioritizing pay-as-you-go users initially for premium features

Subscription users can still benefit from Opus 4.6 improvements:

Adaptive Thinking Controls — Effort levels (low/medium/high) for flexible reasoning
Agent Teams — Collaborate with multiple AI agents in Claude Code (research preview)
Improved Agentic Coding — Better planning, debugging, large codebase handling
Extended Web Research — 84% improvement on BrowseComp for research tasks