Claude 5 is currently the only AI model capable of generating functional Pine Script indicators in a single attempt. The edge isn't in prompt engineering—it's in outcome specification. Define your end state, let the model architect the solution, run overnight execution. You wake up to 80-90% completion rate. This matters for quant shops and retail algo traders trying to compress development cycles. If you're still manually coding indicators or iterating through GPT-4, you're burning time that could be deployed elsewhere. The arbitrage window on AI-assisted trading infrastructure is narrowing.