Five brutal tests. Four models. One verdict. See where Claude Opus 4.7 crushes 4.6, where GPT 5.4 still beats it on speed, and where Gemini 3.1 Pro wins on long multimodal work. Plus the token cost trap and the settings trick that saves your bill this month ⚡

We'll talk about:

• What actually changed between Claude Opus 4.6 and 4.7, including xhigh effort mode, the /ultrareview command, and the new tokenizer
• Whether 4.7 is a real upgrade or just Anthropic resetting 4.6 defaults back to where they used to be
• Test 1, a NVIDIA stock chart analysis that exposed 4.6's biggest weakness on instruction following
• Test 2, a SaaS financial model where 4.7 caught its own math errors mid-build
• Test 3, a hard coding refactor on a real Express.js project, with all four source files included