Claude Opus 5 vs GPT 5.6: Full Comparison (2026)
Here’s what my testing showed. How does Claude Opus 5 vs GPT 5.6 stack up? Both are frontier-grade, but they’re good at different things — and Opus 5’s value is hard to beat. Here’s how they compare on builds, coding, price and where each one wins. Last updated: July 2026. Key takeaways Opus 5: excellent