A modern C++20 AI SDK (GPT‑4o, Claude 3.5, tool‑calling)
Hi all, I’m hacking on new features for the ClickHouse native client and wanted the same “just call the model” ergonomics JavaScript and Python now enjoy. It didn’t exist for modern C++, so I wrote one. ai‑sdk‑cpp (Apache‑2.0) gives you: - Unified calls to OpenAI (GPT‑4o) and Anthropic (Claude 3.5) with a single C++20 API. - Streaming, multi‑turn chat, error handling—all std::optional/std::variant, no macros. - Tool calling (function‑calling) so the model can hit real APIs; sync or async, runs in parallel. The tricky bit: C++ still lacks real reflection, so mapping plain functions →…
A modern C++20 AI SDK (GPT‑4o, Claude 3.5, tool‑calling) launched on June 29, 2025 with 56 votes, #529 of 7,999 launches that month and more than 90% of that year's launches.
In plain words
ai-sdk-cpp is a C++20 SDK that provides a unified interface for calling OpenAI's GPT-4o and Anthropic's Claude 3.5 models. It supports streaming, multi-turn conversations, and tool calling, allowing models to invoke real APIs synchronously or asynchronously. Built for C++ developers who want the same ease-of-use as JavaScript and Python SDKs, it uses modern C++ features like std::optional and std::variant for error handling without macros. The library is released under Apache 2.0 and includes example code for common use cases.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi all, I’m hacking on new features for the ClickHouse native client and wanted the same “just call the model” ergonomics JavaScript and Python now enjoy. It didn’t exist for modern C++, so I wrote one. ai‑sdk‑cpp (Apache‑2.0) gives you: - Unified calls to OpenAI (GPT‑4o) and Anthropic (Claude 3.5) with a single…
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