Anthropic Released Claude Opus 4.7 This Week. It Runs Complex Projects for Hours Without Constant Supervision.

Anthropic released Claude Opus 4.7 in mid-April 2026 with a specific capability upgrade your calendar will feel: the model can now run complex, hours-long projects without getting lost or requiring constant supervision. According to The AI Marketers newsletter covering the April 16, 2026 news, hand it a campaign audit, a competitive research dive, or a slide deck, and it delivers a finished first draft. The model also now pushes back when given incorrect information rather than simply complying, a behavioral change Anthropic describes as making the model more genuinely useful for professional work.

For SEO and marketing teams, the hours-long project capability has direct applications: a full technical SEO audit across all pages of a site, a comprehensive competitor analysis across multiple domains, or a full content gap review for a 50-article blog cluster. These are workflows that previously required manual oversight at each step or were broken into separate sessions that lost context. My public Claude Skills for SEO library documents the prompt patterns that work best for these extended workflows.

Claude Opus 4.7 joins Claude Sonnet 4.6 and Claude Haiku as the current model lineup. The current session is running on Claude Sonnet 4.6, which continues to handle standard analytical and content tasks effectively.