Grok Build Ships Five Versions in Three Days, Now Powered by Grok 4.6
Between September 3 and 5, xAI's coding agent Grok Build shipped five versions (v1.0.17–v1.0.21) in three days, with the official page confirming it is now powered by the latest model Grok 4.6 and offering a free trial. @XFreeze described the pace as "getting ridiculous again," a notable signal of xAI's push into the coding agent market.
Confirmed
- v1.0.17/v1.0.18 (Sept 3, @XFreeze; v1.0.18 details also covered Sept 4 by @markk): MCP tools gained multi-turn elicitation flows (2026-07-28 spec); managed policies block disallowed MCP servers and marketplace installs before writing; the model can render interactive charts via Chart.js; image generation gained richer expression through composer state
- v1.0.19 (Sept 5, @markk, @XFreeze): scheduled /loop tasks now run fully in the background without injecting turns into the current session; on session recovery the model is told which loops, sub-agents, and workflows are still running; Git worktree support added
- v1.0.20/v1.0.21 (Sept 5, @XFreeze): two more versions the same day, with worktree-related capabilities highlighted
- Official confirmation that Grok Build runs on Grok 4.6 with a free trial
Why it matters
- Releasing three versions in one day (v1.0.19→21) shows xAI's aggressive investment in coding agents, heating up competition with Claude Code, Codex, and others
- Background loops, session-state recovery, and Git worktree support all target real pain points of long-running coding agent workflows
- MCP policy enforcement (blocking unauthorized servers and marketplace installs before writes) addresses enterprise concerns over agent supply-chain security
2026-09-03 ~ 2026-09-05 · 5 related posts
Primary sources
- Grok Build v1.0.18 adds managed MCP policy enforcement, multi-round tool elicitation and charts — XFreeze ·
- Grok Build ships three releases in one day, v1.0.19-21 add background loops and worktrees — XFreeze ·
- Grok Build 1.0.19 ships background scheduled loops, session resume context, and --worktree support — mark_k ·
- [source] Grok Build v1.0.18 adds managed MCP policy enforcement, multi-round tool elicitation and charts — XFreeze · 2026-09-03
- Grok Build 1.0.18 Ships: Blocks Disallowed MCP Servers, Adds Chart.js Interactive Charts — mark_k · 2026-09-04
- [source] Grok Build 1.0.19 ships background scheduled loops, session resume context, and --worktree support — mark_k · 2026-09-05
- Grok Build v1.0.19 ships background loops, worktree support, now powered by Grok 4.6 — elonmusk · 2026-09-05
- [source] Grok Build ships three releases in one day, v1.0.19-21 add background loops and worktrees — XFreeze · 2026-09-05