A precise explainer of native tool calling (function calling): what the protocol is, the request/response JSON on the wire, how the model emits it, and why small models fail to produce it.

An LLM only ever outputs text — so how does an AI agent run a tool? The answer is the native tool call, a precise, trained, parseable protocol that most people hand-wave over. Here is exactly what it is, what happens on the wire, and why a small model that knows what to do still cannot make one.

What a Native Tool Call Actually Is

Testing Anthropic Messages API model IDs including claude-opus-4-8, claude-opus-4-7, claude-opus-4-6, and claude-sonnet-4-6 returned HTTP 200 with matching model metadata, but some assistant self-descriptions claimed Qwen or DeepSeek. Here is the raw observation and why model self-identification should be treated cautiously.

Raw Anthropic API tests showed model metadata matching Claude model IDs, while some Chinese self-identification prompts produced Qwen or DeepSeek answers.

Why Does Claude Opus 4.8 Say It Is QWen

A hands-on benchmark of 13 local LLMs — Llama, Qwen3, DeepSeek-R1, Coder models and more — running on a home server with 64GB RAM and RTX 3060 12GB VRAM via llama.cpp. Includes GSM8K math, MMLU knowledge, and HumanEval coding scores, real token speeds, and an honest account of what doesn't fit.

We benchmarked 13 local LLMs on a machine with 64GB RAM and an RTX 3060 12GB using llama.cpp router mode — here's what scored well, what failed to load, and what surprised us.

13 Local LLMs, One RTX 3060: What Actually Runs (and What Doesn't)

In this post, we explore the best free and open-source chat UIs for LLMs, including Open Web UI, LibreChat, AnythingLLM, ChatGPT-UI, GPT4All, oobabooga, Verba, Dify, SillyTavern, Danswer, Lobe UI, Hugging Face Chat-UI, KoboldCpp, PrivateGPT, Serge Chat, Jan, etc.

In this post, we explore the best free and open-source chat UIs for LLMs, including Open Web UI, LibreChat, AnythingLLM, etc.

Exploring the Best Free and Open-Source Chat UIs for LLMs

In this post, we explore two new open-source LLM chat tools: Cherry Studio and ChatBox, highlighting their unique features and LLM integrations.

Tag: Llm

Tag: Llm

What a Native Tool Call Actually Is

Why Does Claude Opus 4.8 Say It Is QWen

13 Local LLMs, One RTX 3060: What Actually Runs (and What Doesn't)

Exploring the Best Free and Open-Source Chat UIs for LLMs

Empowering Your Ideas with AI: Exploring New LLM Chat Tools