How to use Claude Opus 4.6 1M context

A million tokens of context sounds impressive on a benchmark chart. I wanted to know what it does inside a real codebase, so I pointed Claude Opus 4.6 at Inkigo, my production tattoo app, and had it build a prompt history feature with Expo SQLite. The results were mostly great, occasionally messy, and cost me about $2 in API credits. I show it all in the video.

What's inside

• How Opus 4.6 stacks up against GPT 5.2 on coding and agentic benchmarks
• What a 1 million token context window actually buys you
• Watching the model plan a feature across a large codebase
• Storing prompt history locally with Expo SQLite, no API calls
• Where it stumbled: swipe-to-delete and tricky UI details
• The real cost: around 55,000 tokens per request

Resources

BookFrom Idea to App Store with Claude Code

Build and ship a real mobile app with Claude Code. The mental model from idea to deployment, no code required.