I tested 3 top LLMs (GPT-4.5, Sonnet 3.7, Gemini 2.0) head-to-head to build a functional solar lead form with webhook integration. Here’s the raw breakdown:
🔥 Key Takeaways for Busy Builders:
- Sonnet 3.7 Wins (87¢ cost): Generated 95% production-ready code after minor tweaks
- Gemini 2.0 (Free Tier): Fast but messy – required 3x revisions to fix CSS/flow
- GPT-4.5 FLOPS ($2 wasted): Broken design, non-functional JS, and ignored spec
💻 Behind-the-Scenes Drama:
- Token Wars: GPT-4.5 burned 24k tokens for garbage vs. Sonnet’s lean 53k for gold
- The “Separate Files” Trap: Why GPT-4.5’s multi-file output kills real-world workflows
- Speed vs. Accuracy: Gemini’s “sprint” vs. Sonnet’s “marathon” (and why slow wins)
👇 Watch the Full Video HERE