Anthropic Revolutionizes LLM-Anthropic 0.26 with Claude 5
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Anthropic Revolutionizes llm-anthropic 0.26 with Claude 5
Access to Claude Models
The new version 0.26 of llm-anthropic marks a significant advancement with the integration of models from the Claude series. This update, made possible by LLM 0.32, offers unprecedented features.
The new models, namely claude-fable-5, claude-sonnet-5, and claude-opus-5, enhance Anthropic's offerings. Additionally, server-side tools such as WebSearch, WebFetch, CodeExecution, and AnthropicMCP are now accessible via the -T interface of LLM or through Python tools. The previous -o web_search* options have been replaced by -T WebSearch.
Technical Improvements
The update requires a version of llm>=0.32, allowing for reasoning, tool calls, and tool results to be broadcast as typed events. Reasoning for LLM CLI prompts is now visible in standard error, unless the --hide-reasoning/-R option is used.
The simplification of thinking has been introduced with levels of thinking_effort (low, medium, high, very high, or max). The Claude 5 models are configured to think by default; however, the -o thinking 0 option can disable this feature for Sonnet 5 and Opus 5, while Fable 5 retains this capability. The -R/--hide-reasoning option now allows for omitting reasoning from responses and logs. The options thinking_budget, thinking_display, and thinking_adaptive have been removed.
Release Date
This version was released on August 4, 2026 at 10 PM.
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