Course Description

Claude just upgraded its flagship model again: Claude Opus 4.1. In this lesson, you’ll learn what changed, how to access it in Claude Code, and why even “small” benchmark gains can translate into noticeably better real-world outputs. Anthropic+2X (formerly Twitter)+2

What you’ll learn

• How to access Claude Opus 4.1 (Claude web + Claude Code) and confirm the model switch Anthropic+1

• What Anthropic claims improved (coding, reasoning, agentic tasks) and what to watch for in practice Anthropic+1

• How to evaluate upgrades beyond benchmarks using simple, repeatable tests (same prompt, side-by-side outputs)

• What “better” looks like in real projects: UI polish, motion/animation fidelity, gameplay feel, edge-case logic, and finishing behaviors

• How to run a fair A/B comparison workflow inside Claude Code (prompt parity, isolated runs, consistent acceptance criteria)

Hands-on tests included

• Pac-Man build test (HTML/CSS/JS): comparing UI detail, animation, movement smoothness, and game logic completeness

• ShadCN + Framer Motion site test: comparing design quality and whether motion requirements are actually implemented (not just acknowledged)

Who this lesson is for

• Intermediate builders using Claude Code who want to validate model upgrades with real workflows (not hype)