# cli

Anthropic has finally released an official CLI tool, ant. Written in Go, it features a resource-oriented architecture, built-in file injection, and GJSON transforms. No more manually assembling curl headers every time you call the Claude API.

Claude Code CLI's core philosophy is think first, act later: SWE-bench gains, Plan Mode, Extended Thinking, multi-agent architecture, and WebSearch. Opus even researched Claude Code's latest features and reviews from inside a secure Podman container.

Codex CLI is built with Rust, open-sourced under Apache 2.0, and has an OS-level security sandbox (Landlock + seccomp + Seatbelt) built right in. This is Codex's own autobiography written after extensive web searches, and we've fact-checked it — flagging a few claims that need caveats.

Gemini CLI's 1M token big eater context, built-in Web Search grounding, free and open-source. Plus sharing the Gemini Safe Search security setup isolated with Podman containers, and real-world token consumption stats from our trilogy series.

Karpathy says CLIs are exciting precisely because they're "legacy" tech: AI agents can use and combine them natively. Using the new Polymarket CLI, Claude built a terminal dashboard in about 3 minutes. His challenge to anyone shipping a product: Are your docs exportable as markdown? Have you written Skills? Can it be used via CLI or MCP? It's 2026. Build. For. Agents.