Paid Gemini API returns 503 for 3.7 Flash constantly, while 3.1 Pro works fine
silverwoodz · reddit · 2026-08-15
Reddit user silverwoodz reports that Gemini-3.7-Flash in a paid API project constantly returns HTTP 503 UNAVAILABLE with 'model experiencing high demand' even for minimal text requests. The same API key and machine works fine with Gemini 3.1 Pro Preview (HTTP 200). User wants to use 3.7 Flash but it never works.
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