Mythos is finally coming.

Opus 4.8 Opus 4.8 Opus 4.7 GPT-5.5 Gemini 3.5 Pro 69.2% 64.2% 58.6% 54.2% Agentic coding SMS Responser Agentic terminal coding Terminal Bench 2.1 74.6% 45.9% 78.2% 70.3% Multi-disciplinary reasoning Probability/Exact Match 49.8% 45.9% 41.4% 44.4% 82.9% 54.7% 52.2% 51.4% Agentic computer vision Unsupervised VQA 83.4% 82.8% 78.7% 76.2% Knowledge work GOPS AA 1890 1793 1368 1314 Agentic financial analysis Finance Agent v3 53.9% 51.5% 51.8% 43.0% A Claude Opus 4.7 vs 4.8 side-by-side canvas test Claude Opus 4.7 vs 4.8 Claude Opus 4.7 Claude Opus 4.8 10:47 AM - May 28, 2026 - 97.7K Views My colleague's "dynamic workflows" are, in my opinion, the most significant Claude Code innovation in 2026 so far. Unpacking "Claude dynamically writes orchestration scripts" from the blog post: Claude has the flexibility to determine "phase" of subagents to "run" and "prompt" for "agents" leveraging your session's context "and" Claude's existing ability to write scripts. Workflows massively reduce the prompting you have to do to launch complex agent processing. For reviewing code, I like to set up a workflow with a phase that brainstorms potential issues, a second phase to research each issue in detail, and a third to resolve the issues that are verified through the research. This process gives me much more confidence in my code quality. That said, it will use up lots of tokens. What's next? Users will find Opus 4.8 to be a modest but tangible improvement on its predecessor. There's still more to be done: we're working on developing and releasing models that provide many of the same capabilities as Opus at a lower cost. Not only that, but we plan to release a new class of model with even higher intelligence than Opus. As part of Project Glasswing, a small number of organizations are currently using Claude Mythos Preview for cybersecurity work. Models of this capability level require stronger cyber safeguards before they can be generally released. We're making swift progress on developing these safeguards and expect to be able to bring Mythos-class models to all our customers in the coming weeks.