AI Capability Tracker

What lawyers need to know about how AI models are improving — and what it means for practice.

4 entries

March 21, 2026

GPT-5.4 mini and nano released

OpenAI shipped smaller, cheaper versions of GPT-5.4 this week. Simon Willison estimated the nano model could process descriptions of every image in a 76,000-photo library for $52 total. Frontier-level capability is moving downmarket fast.

artificial-intelligence ai-models

Xiaomi's MiMo-V2-Pro matches near-frontier intelligence

The Chinese electronics giant released a reasoning model scoring 49 on the Artificial Analysis Intelligence Index — placing it between Kimi K2.5 and GLM-5. Another non-US lab reaching competitive performance.

artificial-intelligence ai-models

MiniMax-M2.7 delivers GLM-5 intelligence at one-third the cost

An 8-point jump over its predecessor released just one month ago. The price-performance curve continues to steepen.

artificial-intelligence ai-models

Mistral Small 4: open-weights hybrid reasoning

Mistral released a 119B mixture-of-experts model with just 6.5B active parameters per token, supporting both reasoning and non-reasoning modes. Open-weights models continue closing the gap with proprietary ones.

artificial-intelligence ai-models

Want this in your inbox?

We publish weekly on Substack. Primary sources. No fluff.

Subscribe on Substack