Claude Opus 4.8 is Anthropic's flagship hybrid reasoning model in the Claude Opus family, released on May 28, 2026 as the successor to Opus 4.7. Anthropic positions it as a model built for serious coding work and AI agents, blending deliberative reasoning with the consistency and autonomy needed for long-running professional tasks. Early testers described it as having noticeably better judgment in agentic settings, with improvements in coding, agentic skills, reasoning, and practical knowledge work benchmarks relative to its predecessor. The model ships with the same pricing as Opus 4.7 while introducing new ecosystem features: claude.ai users gain control over how much effort the model spends on a task, Claude Code gains a dynamic workflows capability for very large-scale problems, and a fast mode now runs at roughly 2.5 times the previous speed at a reduced cost.

Through this catalog, Opus 4.8 is exposed as a routed variant on a unified LLM gateway that offers an OpenAI-compatible chat completions endpoint alongside other frontier model families. That integration lets developers substitute Opus 4.8 into existing chat pipelines while still drawing on a broader model catalog, and the gateway framing makes the variant a practical choice for teams that want a single interface for experimenting across providers. For fit, the combination of hybrid reasoning, benchmark gains over Opus 4.7, and the new effort controls and dynamic workflows make it well suited to multi-step coding, agentic automation, and professional knowledge work where longer context and sustained autonomy matter most.