opus-4-8
1 article tagged with opus-4-8
May 28, 2026
model releaseAnthropic
Anthropic's Opus 4.8 matches Claude Mythos Preview in alignment, cuts thinking mode costs by 67%
Anthropic released Claude Opus 4.8 on May 28, 2026, replacing Opus 4.7 at unchanged pricing. The company claims the model's misalignment rates match those of Claude Mythos Preview, the experimental model deemed too dangerous for public release in April 2026. Opus 4.8 delivers faster thinking modes at one-third the cost of version 4.7.