First Look at Grok Build CLI: Closer to opencode than Claude Code

Melvin Vivas · X post · 2026-06-23 · Open on X

Topics: AI Dev Tools & Productivity · Level: beginner

Summary

First impressions of xAI's Grok Build CLI coding agent. Melvin says it feels more like opencode than Claude Code or Codex. Paired with Cursor's Composer 2.5 model, it gave pretty decent output.

Key points

• Grok Build CLI is a terminal coding agent.
• Its interface and feel are closer to opencode than to Claude Code or OpenAI Codex.
• You can run it with Cursor's Composer 2.5 model, which gave decent results.

Resources mentioned

• Grok Build · tool · x.ai · free
  xAI's agentic coding CLI; data sharing is on by default and can be turned off with /privacy.
  Also in: Setting up Grok Bot for coding with Grok Build and Cursor CLI (Melvin Vivas on X · notes), Reusable GPU devbox: PyTorch/CUDA plus six coding agents (Melvin Vivas on X · notes), Handing off an unfinished Codex session to Grok Build (Melvin Vivas on X · notes), Grok Build finishes a task Codex left hanging (Melvin Vivas on X · notes) and 10 more
• OpenCode · tool · x.com · free
  Open-source terminal coding agent that can be configured with different model providers, including open models.
  Also in: T3Code: a better interface for terminal coding agents (Melvin Vivas on X · notes), OpenCode Go: Open Coding Models (DeepSeek, Qwen, Kimi, GLM) for $10/mo (Melvin Vivas on X · notes), Trying OpenCode Go After Upgrading OpenCode (Melvin Vivas on X · notes), Orchestrator + Subagents in opencode with Open Models (Melvin Vivas on X · notes) and 10 more
• Claude Code · tool · code.claude.com · paid · recommended by both Bashiri Smith & Melvin Vivas
  Build agents and pipelines from the terminal; the guide's main agentic coding tool.
  Also in: Create Claude Code Plugins with /plugin-authoring (Melvin Vivas on X · notes), Claude Code mods: customize behavior and UI with plugins (Melvin Vivas on X · notes), AI Engineer Roadmap Overview: From ML Foundations to RAG, Agents & Ops (Bashiri Smith on Facebook · notes), SkillsBento: Free Plugin Marketplace for Codex and Claude Code (Melvin Vivas on X · notes) and 101 more
• OpenAI Codex · tool · openai.com · paid
  OpenAI's coding agent. In the diagram it writes code, fixes review findings and drives the build loop. The creator also used it to make this video.
  Also in: An agent bot that installs and drives Codex on its own (Melvin Vivas on X · notes), Asking a Coder bot to install Codex (Melvin Vivas on X · notes), Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Codex Cloud Environments Must Be Saved & Published Before Use (Melvin Vivas on X · notes) and 240 more
• Composer 2.5 · tool · cursor.com · paid
  Cursor's in-house coding model, focused on speed and low cost.
  Also in: One-Shot CRM App with Grok Build + Composer 2.5 (Melvin Vivas on X · notes), Sharing Canvases and Design Mode Edits in Cursor (Melvin Vivas on X · notes), Composer 2.5 as the Default Coding Model in Cursor (Melvin Vivas on X · notes), Cursor Launches Composer 2.5 with Doubled Usage for a Week (Melvin Vivas on X · notes) and 1 more