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GPT-5.6 Luna Is OpenAI’s Value Default

Why GPT-5.6 Luna is the OpenAI value default for bounded Codex work and high-volume API tasks, with subscription and API economics kept separate.

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AI Subscription Capacity Is Perishable

Why AI subscription limits are perishable, how purchased Codex resets differ from credits and grants, and how to use capacity without waste.

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Prompt Caching: Cut AI Agent Token Costs

Learn how prompt caching changes LLM token costs, why coding agents resend context, what compaction can waste, and how to measure Codex, Claude Code, and OpenCode.

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AI Tools in March 2026

March 2026 AI tool recommendations by budget tier — free options, $20/mo, under $100, and $200+. Updated for the current free tier landscape.