Codex and Claude Code appear to be growing faster
Codex and Claude Code both seem to have started growing much faster in early 2026. Claude Code was measured by looking at the minified in cli.js, including . Codex was measured by looking only at the Rust inside the codex-rs folder, which covers the agent logic, without outside .
Because the measurements are different, the raw sizes should not be compared directly. The growth rates are still useful to look at. ears to speed up around February, while Claude Code appears to speed up in late March.
The timing suggests both tools may have shifted toward more AI coding, with Codex’s change lining up with OpenAI’s article about harness engineering for coding.
Key points
- Claude Code and Codex were measured in different ways, so their raw sizes are not directly comparable.
- Claude Code was counted from cli.js and included .
- Codex was counted from Rust in codex-rs and excluded .
- ears to grow faster around February 2026, while Claude Code appears to grow faster in late March.
- The timing may reflect a broader shift toward more .