OpenAI ships multi-agent v2 update adding support for Luna model

OpenAI has rolled out a major upgrade to its multi-agent framework that finally lets its top-tier AI models boss around its fastest one. Multi-Agent v2 now enables GPT-5.6 Sol and Terra to delegate tasks directly to Luna, the speed-optimized variant that was previously locked out of the party due to a version mismatch. The fix addresses what had become a growing pain point for developers building complex AI workflows. Luna was stuck on Multi-Agent v1 classification, which meant Sol and Terra, both v2 models, couldn’t hand it tasks. What changed and why it matters OpenAI’s GPT-5.6 lineup is structured as a three-tier system, each variant optimized for different use cases. Sol handles heavy-lift reasoning tasks, the kind of work that requires deep analysis and multi-step logic chains. Terra sits in the middle, balancing capability against cost. Luna is the speedster, built for high-volume applications where response time and affordability matter more than raw cognitive horsepower. The problem was that these models couldn’t actually work together the way developers expected. A Sol-based primary agent trying to delegate a quick lookup or data-formatting task to Luna would hit a wall. T...