GPT-5.6 Price Cuts: New Luna, Terra and Sol Fast Mode Costs
OpenAI’s July 30 GPT-5.6 update makes Luna and Terra cheaper, adds Sol Fast mode and improves paid Codex usage economics. Here is what changes in practice.
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GPT-5.6
AI Agent Harnesses: GPT-5.6’s ARC-AGI-3 Lesson
What OpenAI's GPT-5.6 Sol ARC-AGI-3 experiment teaches about AI agent harnesses, retained reasoning, context compaction, cost and reliable workflows.
GPT-5.6 Prompting Guide: Sol, Terra & Luna Workflows
A practical GPT-5.6 prompting and model-selection guide with detailed Sol, Terra and Luna workflows for marketers, writers, developers and article production.