llm-benchmarks

GPT-5.6 vs GPT-5.5: What Actually Changed for Agent Builders

OpenAI's GPT-5.6 arrived with three named tiers — Luna, Terra, and Sol. Here's a builder's-eye evaluation of what changed versus GPT-5.5 and how to decide whether to migrate your agents.

07/11/2026 · Model Evaluation · 9 min read

Can You Trust an AI Model Leaderboard? How LMArena and LLM Benchmarks Really Work

An AI model leaderboard like LMArena is now the industry scoreboard — and a $100M business. Here is how Elo-style ranking actually works, where it misleads, and how to evaluate models for your own use case.

06/30/2026 · Model Evaluation · 8 min read