claude-opus-4-5-guide

SKILL.md

Claude Opus 4.5 represents Anthropic's most capable and intelligent model, released November 24, 2025. It combines state-of-the-art reasoning abilities with a revolutionary "effort parameter" that lets you control the model's reasoning depth and token consumption dynamically.

Key Positioning: Opus 4.5 is the best model in the world for complex coding, autonomous agents, computer use automation, and advanced reasoning tasks. It succeeds where previous models required manual intervention and replaces what previously demanded multiple specialized models.

Opus 4.5 isn't just an incremental improvement—it's a model tier reduction. Tasks requiring Opus 4.1 now run on Sonnet with Opus 4.5 for complex work. Budget-conscious teams use Opus 4.5's effort parameter instead of maintaining multiple model versions.

Comprehensive guide to Claude Opus 4.5, Anthropic's most intelligent model with effort parameter for reasoning control. Covers model capabilities, benchmarks, effort levels (high/medium/low), hybrid reasoning, and model selection. Use when working with Opus 4.5, optimizing reasoning depth, choosing models, or understanding effort parameter trade-offs. Source: adaptationio/skrillz.

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