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OpenAI Has Made 6 Acquisitions in 2026 Already — Latest Targets: Open-Source DevTools Astral and Testing Framework Promptfoo
OpenAI has completed six acquisitions in 2026, nearly matching its entire 2025 total. The most recent targets — Astral (open-source developer tools) and Promptfoo (open-source AI testing) — signal a deliberate strategy to control the developer toolchain around its models. Combined with the broader four-labs-four-acquisitions pattern, this confirms that frontier labs are buying developer infrastructure rather than building it, creating a new acquisition category: 'developer experience moat-building.'
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