Corroborated event · 10 outlets
Anthropic unveiled Claude Opus 5.5, while OpenAI launched GPT-6 Sol and Luna, with both releases accompanied by significant price cuts across the industry.
More coverage of this story (15)
Anthropic releases Claude Opus 5.5 and OpenAI launches GPT-6 Sol and Luna
Frontier AI keeps racing despite calls to slow down
The Register AI + ML · 23 Sept 2026, 00:02
Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war
Simon Willison's Weblog · 22 Sept 2026, 23:46
Anthropic releases Claude Opus 5.5 and OpenAI counters with two cheaper GPT-6 models
SiliconANGLE AI · 22 Sept 2026, 22:58
New Anthropic, OpenAI models make same promise: A little more for a lot less money
Ars Technica AI · 22 Sept 2026, 21:25
Better prompt caching for GPT-6
OpenAI News · 22 Sept 2026, 21:00
OpenAI's GPT-6 Sol and Luna cut prices in half but barely move the needle on performance
The Decoder · 22 Sept 2026, 20:06
llm 0.36
Simon Willison's Weblog · 22 Sept 2026, 18:48
Bring more intelligence to everyday work with GPT-6 Sol and GPT-6 Luna on Amazon Bedrock
AWS Machine Learning Blog · 22 Sept 2026, 18:10
OpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakes
TechCrunch AI · 22 Sept 2026, 18:00
Introducing GPT-6 Sol and Luna
OpenAI News · 22 Sept 2026, 18:00
Claude Opus 5.5 is now available on AWS
AWS Machine Learning Blog · 22 Sept 2026, 17:28
llm-anthropic 0.29
Simon Willison's Weblog · 22 Sept 2026, 17:14
Claude Opus 5.5 matches Fable 5.1 performance at lower cost and promises less "Claudish" writing
The Decoder · 22 Sept 2026, 16:31
Anthropic launches Claude Opus 5.5 with stricter safeguards for cybersecurity
The Verge AI · 22 Sept 2026, 16:30
Anthropic releases Opus 5.5 with lower prices and Fable-level performance
TechCrunch AI · 22 Sept 2026, 16:30
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