Xiaolong Cloud Tech Team

Oct 15, 2025 · Artificial Intelligence

Why Do Two Sonnet 4.5 CLI Tools Perform So Differently?

Both Claude Code CLI and GitHub Copilot CLI use the Claude Sonnet 4.5 model, but Claude Code offers a 200K‑token context window, Extended Thinking, and direct API access, while Copilot CLI is limited to about 8K tokens, lacks Extended Thinking, and adds a middle‑layer that slows performance by over five times.