r/Cplusplus • u/Tall-Assignment1349 • 11h ago
Feedback I built a benchmark from jira tickets, LLMs get 47-61% on Cpp tasks
everyone says AI is good at C++ now but the benchmarks they quote are all competitive programming stuff. so I made one from real firmware tickets - SCPI commands, register maps, datasheet lookups, spec debugging.
frontier models: 47-61%. on SCPI the best one got 36%. one got 0%.
i mean the worst part is they never say idk. for example: vmulq_s64 as a neon intrinsic which doesn't exist.
simple tools like search on docs with gpt-5.4-mini resolved 89% of tickets much better than frontier models
src: github.com/ByteAsk/C-CppBench
i have added mcp search tool as well: github.com/ByteAsk/ByteAsk-Embedded-MCP (MIT)