OpenAI Launches GPT-6 Sol and Luna at Half the Cost, Claiming Fewer Errors
Updated
Updated · TechCrunch · Sep 22
OpenAI Launches GPT-6 Sol and Luna at Half the Cost, Claiming Fewer Errors
3 articles · Updated · TechCrunch · Sep 22
Summary
GPT-6 Sol and Luna are now rolling out across ChatGPT Work, Codex and the API, with Luna also headed to the desktop app plus Free and Go tiers.
50% lower pricing versus the 5.6-series models is the headline change, which OpenAI attributes to caching and inference improvements aimed at making GPT-6 cheaper and more accessible.
OpenAI said GPT-6 Sol makes about half as many factual mistakes as its predecessor on an internal evaluation and reaches Astra-level reliability at a lower cost, while also cutting coding errors.
The release expands the GPT-6 lineup after Astra launched earlier this month, and lands amid a tight race with Anthropic, which updated Opus 5.5 about 90 minutes before OpenAI's announcement.