IBL News | New York
Anthropic announced Claude Opus 4.5, the latest version of its flagship model, following the launch of Sonnet 4.5 in September and Haiku 4.5 in October. It includes improvements to memory for long-context operations.
“Claude Opus 4.5 is state-of-the-art on tests of real-world software engineering,” and “is the best model in the world for coding, agents, and computer use,” said the company.
Opus 4.5 is already available in the apps, API, and on all three major cloud platforms. For developers, pricing is $5/$25 per million tokens.
This model will face competition from other recently released frontier models, most notably OpenAI’s GPT 5.1 (released on November 12) and Google’s Gemini 3 (released on November 18).
Alongside Opus, Anthropic released updates to the Claude Developer Platform, Claude Code, desktop app, and consumer apps.