MiniMax M3.1 vs GPT-6 Luna vs DeepSeek V4.1 Flash: 3x Price Gap [2026]
Three new budget-tier language models shipped inside a five-day window in late September 2026, and none of them price themselves the same way. MiniMax dropped M3.1 Flash Preview into its coding agent on September 27 without publishing a single rate. OpenAI’s GPT-6 Luna, live since September 22, undercuts its own flagship Astra tier by roughly…