The Anthropic vs OpenAI race put frontier models in every ChatGPT and Claude tier. For moderate to heavy users, $100 on each lab beats $200 on one.

Claude Code runs four loop types: turn-based, goal-based, time-based, and proactive. What each means and how to set a real stop condition.

A second AI model that doesn't share Claude's blind spots catches more bugs than Claude reviewing itself. Here's how model stacking works.

What Claude Code /compact keeps and loses, straight from Anthropic's docs. The full survival table plus how to make rules and skills persist.

GLM 5.2 vs Opus 4.8 vs Sonnet 5: the only clean benchmark comparisons, why cross-vendor numbers mislead, pricing, open weights, and which to use.

GLM 5.2 is Z.ai's open-weights MIT model: 753B MoE, 1M context, $1.40/$4.40 API. Benchmarks, self-host reality, and how it stacks up vs Claude.

Sonnet 5 vs Opus 4.8 compared: Opus leads coding and reasoning by 0.5 to 6.6 points; Sonnet 5 ties knowledge work at ~40% less cost.

Claude Sonnet 5 scores 63.2% agentic coding at $2/$10 per million tokens (intro), closing the gap with Opus 4.8. Specs, benchmarks, pricing.

GPT-5.6 (Sol, Terra, Luna) is now generally available. Pricing, per-plan access, the launch-day reception, and how Sol compares to Claude.

Claude Code Artifacts turn session work into live, shareable pages at a versioned URL. Private by default, in beta for Team and Enterprise.

Claude Code sub-agents are now resumable via SendMessage and nest 5 levels deep. The persistent sub-agent pattern, field data, and the gotchas.

Claude Code subagents can now spawn their own subagents, capped at depth 5. How nesting works, the workflows it unlocks, and the token costs.