Anthropic has announced that upgraded versions of its Sonnet and Opus models will be released in the coming weeks. The new versions of Claude will feature hybrid thinking capabilities and expanded tool handling.

The test model, codenamed "Neptune" (possibly a reference to version 3.8 as the eighth planet in the solar system), is currently undergoing security testing. In parallel, Anthropic is launching a new bug bounty program to test Claude's security principles.

While Anthropic releases updates less frequently than its competitors (the latest 3.7 Sonnet model was released in February), the company is clearly focused on quality, not speed.