Opus 4.7 dropped on April 16. Most devs use it exactly like Sonnet. Effort mode, cache, vision, instruction following, routing: 5 specific settings, with use cases and pitfalls.
Factory raises $150M at $1.5B, OpenAI targets Claude Code, Opus 4.7 retakes the SWE-bench lead, Claude Design launches in preview, and Mythos enters US federal agencies.
Since February, developers have been saying Claude Opus 4.6 got worse. I went back through the tweets, GitHub issues, and Anthropic replies to understand what actually happened.
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