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Claude Opus 5.5 and OpenAI GPT-6 Sol & Luna both launch today with lower costs

Anthropic said Opus 5.5 cuts running costs about 40% while OpenAI said Sol and Luna are about 50% cheaper per 1 million tokens.

Summary by 9 to 5 Google
Anthropic and OpenAI are both launching new model updates today, with Claude Opus 5.5 and GPT-6 Sol & Luna both being announced within roughly an hour of each other. more…

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Anthropic reduces the cost of using its main model by 40% and OpenAI responds by cutting in half the rates of its new GPT-6 family, after a summer in which both companies defended to slow down the pace of the Read

·Madrid, Spain
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Anthropic's new model, Opus 5.5, is second in the range open to the public at the start-up in San Francisco, behind Fable, but equals "on most tasks" for a lower price of 20%, announces the company. OpenAI, for its part, unveiled GPT-6 Sol and Luna, "faster and more affordable" versions of GPT-6 Astra, its most powerful model launched on September 3, at prices divided by two compared to their previous versions. They are initially reserved for pr…

·Issy-les-Moulineaux, France
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OpenAI has unveiled GPT-6 Sol and Luna's "faster and more affordable" variations.

·Montreal, Canada
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IBTimes broke the news in New York, United States on Tuesday, September 22, 2026.
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