Google's Gemini 3.5 Flash costs 3x the model it replaced, and the era of cheap AI is ending
… OpenAI's GPT-5.5 doubled GPT-5.4’s standard per-token pricing: from $1.25/$7.50 to $2.50/$15 for short context, and from $2.50/$11.25 to $5/$22.50 for long context. …