Expired50% confidenceOpinionExact time
OpenAI's newly released GPT-6 series has been out for less than a month, and has lost its advantage in cost and performance dimensions under the impact of Claude Sonnet 5.5.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
9/30/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/14/2026(expired)
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Related Claims
UnverifiedClaude Sonnet 4 went live before GPT-5.6 Pro.78% similarUnverifiedOpenAI 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.77% similarUnverifiedOn June 26, OpenAI released the GPT-5.6 series, adopting for the first time a four-tier stratification strategy of flagship, balanced, fast, and cheap, with the flagship version topping the Terminal Bench 2.1 benchmark with a score of 91.9%.77% similar
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