On July 15, SpaceXAIopen-sourced Grok Build, its terminal coding agent, under an Apache 2.0 license. "Grok Build is now open source," Musk posted. The move looks like a direct attack on Claude Code and Codex: give developersthe harness for free, reset the usage limits, and make the competing tools defend their prices.
Then Bloomberg supplied the number that explains why SpaceXAI can afford the move. Anthropic, the company behind Claude Code, reportedly pays SpaceXAI $1.25 billion a monthfor compute. Across Anthropic, Google, and Reflection, SpaceXAI's compute agreements total roughly $2.3 billion a month.
Musk iscompeting with Anthropic for developers while renting Anthropic the machines it needs to compete. Grok does not have to beat Claude for SpaceXAI to benefit from Claude's growth.
Open-sourcing the harness mayexpand the market for coding agents. SpaceXAI is unusually positioned to make money if that happens, even when developers choose Claude instead.
Still managing separate access tools for humans, pipelines, and AI agents?
Most access tools were built for humans, not CI/CD jobs, service accounts, or AI agents making tool calls across your infrastructure. Join us on July 28 to see what a single, unified access architecture actually looks like today, without adding IT overhead or slowing your engineering teams down.
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TailscaleUP is the conference for engineering, security, and IT leaders shaping the future of secure connectivity across all teams, infrastructure, services, workloads, and devices. Engineering leaders, IT & network managers, CISOs and security architects will come together to learn how to boost developer velocity, de-risk their organizations, and improve user experiences for everyone.
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