Claude Opus 4.8
Overview
Claude Opus 4.8 is Anthropic's new flagship model, released May 28, 2026. It improves on Opus 4.7 with stronger coding, more honest self-assessment, and a faster, cheaper fast mode, at the same standard pricing. New features include user-controlled effort levels and Dynamic Workflows for parallel subagents.
About Anthropic
Anthropic is a technology company specializing in artificial intelligence and machine learning solutions.
Tools using Claude Opus 4.8
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Claude — v4.8Claude Opus 4.8 Best in class coding: record 69.2% on SWE-Bench Pro, up from 4.7's 64.3% New fast mode: ~2.5x speed, about 3x cheaper User-controlled effort levels (high default, plus "extra"/"max") Dynamic Workflows (research preview): spins up hundreds of parallel subagents in a single session More honest: roughly four times less likely to let coding errors pass unremarked
