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New Delhi: Anthropic has officially introduced its latest Claude Sonnet 4.6. The latest model also unveils upgrades over the Sonnet 4.5 model in aspects such as coding, computer use, long-context reasoning, agent planning, knowledge work, and design. Anthropic has also introduced a 1 million token context window in beta, enabling the model to process significantly larger amounts of information in a single session. Anthropic has also stated that this latest model will be the default model for users on the Free plan and those with the Pro plan through Claude’s official website and Claude Cowork.
It offers a 1M token context window currently in beta, which is stated to enable users to input entire codebases, long legal contracts, or multiple research papers in one go. The model is designed not just to accept larger inputs but to reason effectively across them, which could improve long-term planning and complex task execution. Anthropic has also claimed Sonnet 4.6 brings major gains in coding ability. Internal testing within the Claude Code, the users reported preferring Sonnet 4.6 over Sonnet 4.5 around 70% of the time.
Anthropic has said that the early users of Sonnet 4.6 have observed near-human level capability in tasks such as navigating complex spreadsheets and completing multi-step web forms across browser tabs. Anthropic has also noted that the model still lags behind skilled human users. Anthropic has also acknowledged security concerns, such as prompt injection attacks, where the hidden instructions on websites attempt to manipulate AI behavior. Anthropic stated that Sonnet 4.6 shows improved resistance compared to Sonnet 4.5.
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