Claude Opus 4.8
Claude Opus 4.8 targets long-horizon agentic execution, complex multi-step coding including mid-task refactors, and knowledge-work writing with clearer, less hedgy prose. It is available on AI Gateway via anthropic, bedrock, vertexAnthropic with adaptive thinking and configurable effort.
import { streamText } from 'ai'
const result = streamText({ model: 'anthropic/claude-opus-4.8', prompt: 'Why is the sky blue?'})