MiniMax M3.1 Flash API pricing is set at $0.15 per million input tokens and $0.60 per million output tokens, with cached input reads priced at $0.015 per million tokens.

From the articleMiniMax's new M3.1 Flash beats DeepSeek and Opus 5 on a key business benchmark at lower cost — but with a high hallucination rateAlso in MiniMax Just Launched M3.1 Flash: 428B MoE Agentic Model at $0.15/M Input, MiniMax M3.1 Flash shows China's AI price race has no floor in sight