I evaluated GPT Proto for a small SaaS team that was using GPT-4 for one feature, Claude for another, and Gemini for a third — three accounts, three bills, three SDKs, three failure modes. After moving to GPT Proto, the integration code shrank to one HTTP wrapper and the monthly invoice went down by about 30% (consistent with the 40% claim, accounting for the specific mix). The actual game-changer was the failover layer: during a 90-minute Anthropic API hiccup, the application kept running on automatic failover to Claude alternatives without intervention. For teams that have reached the point where multi-provider AI usage is real and reliability matters, this is genuinely useful. For experimental projects with one provider, the value-add is smaller — direct integration is fine.
★★★★☆
4/5
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