xAI ships Grok Build CLI: 8 concurrent subagents, 70.8% SWE-Bench, $99 intro price
Read this because The 8-parallel-subagent design, not the benchmark score, is the structural choice worth watching. If it holds, the cost model flips from "tokens per task" to "tasks per wall-clock minute" — every Claude Code/Codex shop needs to re-benchmark on throughput, not accuracy.
May 14 public beta. SWE-Bench 70.8%, 256K context, $0.20/$1.50 per 1M tokens, $99 intro. 8 subagents on git branches turns the race four-way.