In Claude Code 2.1.45:

  1. Default (recommended)   Opus 4.6 · Most capable for complex work
   2. Opus (1M context)        Opus 4.6 with 1M context · Billed as extra usage · $10/$37.50 per Mtok
   3. Sonnet                   Sonnet 4.6 · Best for everyday tasks
   4. Sonnet (1M context)      Sonnet 4.6 with 1M context · Billed as extra usage · $6/$22.50 per Mtok

▲ michaelcampbell 5 hours ago | parent [-]

Interesting. My CC (2.1.45) doesn't provide the 1M option at all. Huh.

▲

minimaxir 4 hours ago | parent [-]

Is your CC personal or tied to an Enterprise account? Per the docs:

> The 1M token context window is currently in beta for organizations in usage tier 4 and organizations with custom rate limits.

	▲	michaelcampbell 4 hours ago \| parent [-]
		The one I'm looking at right now some is sort of company level sub, so they probably have the upcharge options turned off. Thanks!