OpenRouter: Fusion wins this head to head because it was better where mistakes actually cost you. In the Go rate limit parser, Fusion delivered a complete, compilable snippet and got the edge cases right: case insensitive header lookup, trimming, rejecting signed and fractional numerics, and parsing both RFC1123 and RFC1123Z. DeepSeek V4 Pro stumbled on basics here — no package declaration, an unnecessary net/http import, and a real logic bug in treating a valid integer value of "0" as invali...
source & further reading
runtimewire.com — original article
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