model-comparison

GPT-5.6 Migration: What Changed, and What a Real Agent Move Actually Saved

A GPT-5.6 migration is now a real decision for agent teams: OpenAI's new Luna/Terra/Sol tiers landed July 9, and one production team already reported a migrated agent running 2.2x faster and 27% cheaper. Here's what changed and how to think about the switch.

07/13/2026 · Model Evaluation · 8 min read

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

GPT-5.6 Explained: How Luna, Terra, and Sol Differ

OpenAI's new GPT-5.6 family splits into three named tiers — Luna, Terra, and Sol — under a "scales with your ambition" pitch. Here's what changed, how the tiers are organized, and how it reaches Microsoft 365 Copilot.

07/10/2026 · Model Evaluation · 6 min read

GPT-5.6 "Sol" Explained: What's New, How It Compares to GPT-5, and Why the Rollout Is Restricted

OpenAI previewed GPT-5.6 "Sol" — then limited its rollout after a government request. Here's what's actually confirmed, what isn't yet, and what the restriction signals for frontier-model releases.

06/27/2026 · Industry Trends · 6 min read

GLM-5.2: The New Leader in Open-Weights LLMs for Long-Horizon Agents

GLM-5.2 ships under an MIT license with a 1M-token context and now tops the open-weights field for long-horizon coding and agent work. Here's the evidence, how it compares, and how to run it.

06/22/2026 · Model Evaluation · 7 min read

GLM-5.2 for AI Agents: Benchmarks and How It Compares for Long-Horizon Tasks

GLM-5.2 is a new MIT-licensed, 1M-context open-weights model explicitly tuned for long-horizon agentic work. We break down what's new, the benchmarks that matter for agents, and how to judge it for your own stack.

06/20/2026 · Model Evaluation · 9 min read