claude -v: Check Your Claude Code Version in 5 Seconds

When writing a blog post or documentation, have you ever been stuck wondering, "which version is this based on?" Or, when something isn't working, "is my version too old?" In those moments, this is the very first command to check.

Definition (What It Is)

claude -v is a command that checks the version of Claude Code you currently have installed (-v = version). A version is a number indicating which update iteration of the software it is. When you run it, a number like 2.1.154 appears on one line and that's it.

How to Use It (By Difficulty)

Before you start: This command works the same no matter which folder you type it in. There's no need to move into a work folder—just open the terminal and type it. No special setup or login is needed either.

Basic — View the version

claude -v

When you run it, the currently installed version number prints on one line (e.g., 2.1.154). No chat window opens or anything; it just shows the number and ends right away. If a message like "claude not found" appears, that means Claude Code isn't installed yet or its install path isn't recognized.

Real-World Example

Many people check the exact number with claude -v before writing "this post is based on such-and-such version" in a blog post. Since a command's behavior can vary slightly by version, noting the reference version keeps readers from getting confused.

More Ways to Use It

• Knowing the version lets you accurately note the "reference version" in blogs and docs, which raises the post's credibility.
• When something behaves oddly, checking the version first to see "whether it's too old a version" helps you narrow down the cause quickly.
• When asking for help, including the version number helps the other person understand your situation precisely.

Wrap-Up

claude -v is the simplest but frequently used check command. Type one line in any folder and the current version number appears right away. Remember it for when you note a reference in docs, and as the first step in troubleshooting.

Reference: Claude Code v2.1.154 (2026.05)