GPT-6 Sol and Luna target cheaper everyday agent work

OpenAI has introduced GPT-6 Sol and Luna as faster, lower-cost alternatives to Astra for work such as coding and computer use. The announcement also describes prompt-caching changes that preserve earlier context when reasoning effort or available tools change. These are useful knobs for agents that repeatedly revisit a codebase, although task quality still needs evaluation.

OpenAI

Why it matters

Worth comparing when repeated agent runs make latency and inference cost significant.

More context

Try a representative task through supported Codex or ChatGPT Work access, or the paid API. The announcement lists Sol and Luna for paid Work/Codex plans and Luna for Free/Go desktop users. The readable source did not expose an exact publication date.

Keep in mind

Performance comparisons are vendor-reported and depend on evaluation setups. Lower token prices do not guarantee lower total task cost; 1min has not benchmarked these models.

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