Expired50% confidenceFactExact time
GPT-6 Luna is one of the cheapest models in OpenAI's history, with only GPT-4.1 Nano and GPT-5 Nano priced lower.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
9/23/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/7/2026(expired)
Sources
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Related Claims
UnverifiedOpenAI released a new generation model GPT-5.6, internally codenamed Sol, which is reportedly capable of performance close to Fable 5—which has not yet been widely released—but at a lower cost.75% similarPartially VerifiedOn July 9, 2026, OpenAI simultaneously released three models: GPT-5.6 Sol, GPT-5.6 Terra, and GPT-5.6 Luna.73% similarVerifiedLuna is positioned as the lowest-cost, fastest-response economy model in the GPT-5.6 family.71% similarVerifiedLuna can approach the peak performance of the previous generation at less than half the cost of GPT-5.5.70% similar
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