Gabe-LS/claude-opus-4-6-1m.md

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How to use Claude Opus 4.6 1M in Claude Code

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claude-opus-4-6-1m.md

Using Claude Opus 4.6 1M in Claude Code

Claude Opus 4.6 with the 1M context window can be used in Claude Code in two ways.

Option 1: Launch with the model flag

claude --model claude-opus-4-6\[1m\]

This sets the model for the current session only, without changing your default.

Option 2: Switch models inside a session

Start Claude Code normally:

claude

Then use the slash command to switch models:

/model claude-opus-4-6[1m]

Note: /model saves the choice as your new default. To use a model temporarily without changing your default, use --model at launch (Option 1).

Restore default model

If /model or another setting change overwrote your default, restore it with:

sed -i '' 's/"model": ".*"/"model": "claude-opus-4-6[1m]"/' ~/.claude/settings.json

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