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OpenAI announced ChatGPT updates to GPT-5.6 Sol and broader free-user access to GPT-5.6 Luna.
HN debated whether widening access reflects competition or a more useful product principle: ordinary users should not need to choose a reasoning setting before asking a question.
The top HN threads: facts from the discussions, both sides, insider voices. Email, Telegram, or RSS.
Luna now costs $0.20 per million input tokens and $1.20 per million output tokens. OpenAI says the cut makes high-volume tasks such as document analysis, classification, testing and routine implementation practical at a much wider scale.
The useful split is operational: use Sol for ambiguity and planning, then hand well-specified implementation and evaluation to Luna. Fast mode speeds up Sol up to 2.5×, but costs twice the Standard rate.
