Anthropic Raises $65 Billion, Launches Claude Opus 4.8 With Improved Honesty and Coding Capabilities

Anthropic raises $65 billion in a Series H funding round at a near-trillion dollar valuation while simultaneously launching Claude Opus 4.8, a more honest and capable AI model that is four times less likely to miss its own coding flaws, with new agentic features and a teased next-gen model class called Mythos on the horizon.

• Anthropic launches Claude Opus 4.8 on the same day it announces a $65 billion Series H funding round at a near-trillion dollar valuation, with the new model delivering performance improvements across coding, reasoning, agentic tasks, and financial analysis.
• A standout feature of Opus 4.8 is its improved honesty — early testers report it is more likely to flag uncertainties and less likely to make unsupported claims, while also being four times less likely to miss flaws in its own code during agentic tasks.
• Anthropic also introduces new features including dynamic parallel workflows in Claude Code, user-controlled effort settings, and an updated Messages API, while teasing an upcoming class of models with even higher intelligence than Opus, likely called Mythos.