Anthropic Releases Cheaper Opus 5.5 Model Ahead of Planned IPO

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Anthropic PBC unveiled Claude Opus 5.5, a new artificial intelligence model it says performs similarly to its more capable Fable 5.1 offering on most work while costing significantly less to use than the prior Opus 5 option. The company said the new model also generates output faster than Opus 5 and writes more clearly. Anthropic plans to expand its 5.5 family of models with new versions of Claude Sonnet and Haiku in the coming weeks. The release comes as the Claude maker competes with OpenAI, Alphabet Inc.'s Google and a long list of Chinese firms for customers, and as it prepares for a highly anticipated Wall Street debut expected as soon as this fall, while rival OpenAI waits until next year. Opus 5.5 is the first new model since Anthropic Chief Executive Officer Dario Amodei called on the industry to support slowing the pace of AI development and said his firm would implement new safety steps, including bringing on third-party evaluators. Anthropic said Opus 5.5 was tested by external firms including METR and Frontier Design before its release, and that it is implementing safeguards similar to its more powerful Fable model meant to limit riskier cybersecurity and biology uses.

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Anthropic launched Claude Opus 5.5, a cheaper, faster model with external safety testing, ahead of its planned IPO

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