Build an AI agent
Connect a model to tools and context, then keep its permissions under control.
- Large language models
- Context and tokens
- AI agents
- MCP
- Prompt injection
The AI Landscape: Model Vendors, Hardware and Key ConceptsElena Daehnhardt |
Image credit: Illustration created with Midjourney, prompt by the author.
Image prompt“An illustration representing cloud computing” |
AI news moves quickly, but the cast of players changes slowly. This map shows who builds the models, who makes the chips they run on, and the concepts that tie it together. Select any node to see a short explanation and the posts on this blog that cover it.
Select any node to see what it is and which posts on this blog explore it.
New here? Tap a topic to see what it is, or pick a learning path for a suggested order.
Solid ring: finished. Dashed ring: saved. Arrows: learn this first, or the order of a path.
The labs that train and ship foundation models, from closed frontier systems to open-weight families you can run yourself.
Maker of the GPT models and ChatGPT, plus Codex for coding and Sora for video. Its models set the pace for consumer chat assistants.
Maker of the Claude family and Claude Code. Known for its focus on safety research, long context and agentic coding.
Builds the Gemini models and the open Gemma family, and designs its own TPU chips, so models and hardware are developed together.
Releases the Llama models with open weights, which made Llama a common starting point for local and fine-tuned models.
Builds the Grok models, tightly integrated with the X platform and trained on very large GPU clusters.
European lab shipping both open-weight and commercial models, popular for efficient models that run on modest hardware.
Chinese lab best known for efficient open-weight reasoning models that showed strong results at a fraction of the usual training cost.
Alibaba's Qwen family spans many sizes, from phone-class to very large models, mostly released with open weights.
Chinese lab behind the Kimi models, focused on long context and agentic tool use, with open-weight releases.
Chinese lab behind the GLM models, which compete closely with Western models on coding benchmarks.
The chips and foundries that decide how fast models train, how cheaply they run, and where they can run at all.
Dominant supplier of AI training and inference GPUs. Its CUDA software stack is as important to its position as the chips.
The main merchant-GPU alternative to NVIDIA, with Instinct accelerators and the open ROCm software stack.
Google's custom tensor processors, built for training and serving its own models and offered through Google Cloud.
Amazon's custom training and inference chips, used to lower the cost of running models on AWS.
No blog posts on this yet.
M-series chips combine CPU, GPU and neural engine around unified memory, which makes laptops and desktops surprisingly capable for local models.
Supplies the neural processing units in many phones and laptops, and is pushing into data-centre inference.
Still ships most of the world's server CPUs and builds Gaudi accelerators and NPUs for PCs.
No blog posts on this yet.
Builds wafer-scale processors aimed at very fast model training and low-latency inference.
No blog posts on this yet.
The foundry that manufactures most leading AI chips, so its capacity and advanced packaging are a bottleneck for the whole industry.
China's most prominent domestic AI accelerator line, central to efforts to reduce reliance on imported GPUs.
The ideas that explain how models are built, adapted, connected to tools and kept under control.
Layers of simple units whose connection strengths are learned from data. Every model on this map is built from them.
The attention-based architecture behind modern language models. Attention lets each token look at all the others in the context.
No blog posts on this yet.
Transformers trained on huge amounts of text to predict the next token, then adapted to follow instructions.
Pre-training teaches general patterns; fine-tuning, including parameter-efficient methods such as LoRA, adapts a model to a task or style.
Models trained to spend extra compute thinking step by step before answering, which helps on maths, code and planning.
Models read text as tokens and can only attend to a limited context window. Tokenisation and window size affect cost and quality.
Retrieval-augmented generation fetches relevant documents at question time and gives them to the model, grounding answers in your own data.
Models that plan, call tools and act over several steps. Useful, but they widen the security surface.
The Model Context Protocol is an open standard for connecting models and agents to tools and data through small servers.
Models that handle text, images, audio and video in one system, including image generators built on diffusion.
Models whose trained weights can be downloaded and run locally, in contrast to API-only systems. Licences differ, so read them.
Storing weights with fewer bits (for example 4-bit) so large models fit on smaller GPUs and laptops, at a small cost in quality.
No blog posts on this yet.
Running models on your own machine with tools such as Ollama, for privacy, cost control and offline use.
Training and serving models is limited by accelerator supply, memory bandwidth and power, which shapes costs and who can compete.
Fluent but false output. Grounding with retrieval, citations and verification reduces it but does not remove it.
Untrusted text that tricks a model or agent into following the attacker's instructions, especially dangerous when tools are attached.
Evaluations, guardrails and laws such as the EU AI Act that set expectations for how powerful models are built and deployed.
Short routes through the topics, in a sensible order. Mark topics as done to see what is next.
Connect a model to tools and context, then keep its permissions under control.
From open-weight models and quantisation to private retrieval on local hardware.
Grounding, tool access and the risks that come with them, then the wider rules.
Last updated: 2026-10-21. Nodes without posts are topics I have not written about yet.
For step-by-step reading, see the blog series.