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[ARTICLE · art-137500] src=the-decoder.com ↗ pub= topic=large-language-models verified=true sentiment=· neutral

OpenAI's GPT-6 Sol and Luna cut prices in half but barely move the needle on performance

OpenAI released two cheaper models, GPT-6 Sol and GPT-6 Luna, that match their predecessors' performance at half the token price, according to The Decoder. Independent analyses found little gain in actual intelligence from the models, which target Anthropic's pricier offerings, and OpenAI likely did not anticipate Anthropic's simultaneous launch of Opus 5.5.

by read1 min views2 publishedSep 22, 2026

With GPT-6 Sol and Luna, OpenAI adds two cheaper models that deliver their predecessors' performance at half the token price and take aim at Anthropic's pricier offerings. Independent analyses find little gain in actual intelligence, though, and OpenAI likely didn't see Anthropic's simultaneous launch of Opus 5.5 coming.

The article OpenAI's GPT-6 Sol and Luna cut prices in half but barely move the needle on performance appeared first on The Decoder.

source & further reading
the-decoder.com — original article Claude Opus 5.5 matches Fable 5.1 performance at lower cost and promises less "Claudish" writing OpenAI calls for international standards on AI that could improve itself A tiny software layer from lab-grown neurons promises faster, cheaper AI video
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