GoKawiilOpenAI releases GPT-6 Sol and Luna with lower API prices, fewer errors
OpenAI has updated its smaller GPT-6 models, Sol and Luna, following this month's launch of the flagship GPT-6 Astra. The company says API access to the new Sol and Luna models costs half as much as the previous 5.6 series, citing gains in caching and inference, and claims GPT-6 Sol makes roughly half as many factual mistakes as its predecessor while also reducing coding errors.
GoKawiil's interpretation of the reporting above, not reported fact.
The price cut suggests OpenAI is pushing to make its mid-tier and lightweight models more attractive for high-volume commercial use, where cost per query matters more than raw capability. OpenAI's repeated comparisons to Anthropic's Fable and Opus models, released within 90 minutes of each other, point to intensifying competitive pressure between the two labs over both performance and pricing.
- OpenAI updated its Sol and Luna models within the GPT-6 family, following the Astra flagship release.
- API pricing for the new models is half that of the prior 5.6 generation, attributed to caching and inference improvements.
- OpenAI claims fewer factual and coding errors, and directly compares performance against Anthropic's Fable and Opus models.
Source: techcrunch.com — Lucas Ropek, 2026-09-22
Published there as: “OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakes”
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