Anthropic and OpenAI on Tuesday each announced new, less costly artificial intelligence models as both frontier labs continue to face stiff competition from cheaper, open-weight competitors. OpenAI introduced additional tiers to its GPT-6 family, with GPT-6 Sol and GPT-6 Luna, slashing the API prices by 50% compared with GPT-5.6 promotional pricing. Sol, which is a tier below Astra, is meant for more complex workloads like coding, while the company's Luna offering is geared toward "high-volume tasks" like extracting information or summarizing documents, the company wrote. Anthropic unveiled Claude Opus 5.5 on Tuesday, its latest release in the new Claude 5.5 model family.
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