Unverified50% confidenceFactExact time
Anthropic first released Opus 5.5 and then Sonnet 5.5 with comparable performance at half the price, and OpenAI replicated the same strategy with GPT 6.1 Sol.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/4/2026
First Seen
Valid until: 1/2/2027
Sources
Related Entities
Related Claims
UnverifiedOpenAI'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 5.5.77% similarVerifiedOpenAI 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.72% similarUnverifiedThe blogger believes GPT-6.1 Sol can serve as the default coding model and replace Sonnet, but still prefers to use Opus 5.5 as the primary everyday model.70% similarUnverifiedThird-party platform tests show that Opus 5.5's token efficiency is far inferior to that of the GPT-6 series.70% similarUnverifiedOpenAI simultaneously launched a new online "Work" interface alongside GPT-5.6, which the blogger considers a poor decision.66% similar
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