Claude Opus 4.8

Claude Opus 4.8 adds seven capabilities but lacks performance benchmarks

Claude Opus 4.8 introduces a significant expansion of capabilities without accompanying performance data. The model now supports seven new features: tools, vision, JSON mode, PDF input, reasoning, JSON schema, and prompt caching. These additions represent a substantial broadening of the model's functionality, particularly with the inclusion of multimodal capabilities through vision and PDF input, as well as structured output options via JSON mode and schema support. The reasoning capability suggests enhanced analytical features, while prompt caching could improve efficiency for repetitive tasks. However, no benchmark scores are available in the current window, making it impossible to assess the model's actual performance across standard evaluation metrics or compare it to previous versions or competitors. Users gain access to a more versatile model with expanded input and output formats, but without performance data, it remains unclear whether these new capabilities come with any trade-offs in speed, accuracy, or other quality metrics. The absence of benchmarks is notable given that this appears to be a major feature release.