OpenAI releases GPT-6 Sol and Luna, half the price of the previous generation; Luna costs 1% of the flagship Astra
The two leading labs slashed prices on the same day, and GPT-6-level intelligence is becoming almost free raw material for any application.
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Sol is built for code, agents and work automation, Luna for mass-market tasks such as summaries and data extraction; both accept text and images and hold a context of about 1.05 million tokens. Sol costs $2/$10 per million tokens, Luna $0.10/$0.50, roughly half the price of the 5.6 models; OpenAI attributes the cut to improvements in caching and inference. According to the company, Sol makes about half as many factual errors as its predecessor and scores 68.8% on DeepSWE v1.1. The models are available in the API, ChatGPT Work and Codex, and Luna also to free users. Ninety minutes later Anthropic released Opus 5.5, and the price comparison with Claude that OpenAI had bet on became outdated the same day.