AWS launches Graviton5-powered M9g/M9gd EC2 instances; Claude Fable 5 GA on Bedrock

The Graviton5 launch extends Amazon's decade-long custom-silicon strategy — CEO Andy Jassy noted the Annapurna-designed CPU line began roughly 11 years ago. M9g and M9gd instances post up to 25% faster general compute, 35% faster ML inference, and 30% faster database performance over Graviton4, targeting cost-sensitive inference and data workloads where AWS wants to keep customers off pricier GPU instances.

Alongside the silicon, AWS made Claude Fable 5 generally available on Bedrock, bringing Mythos-class capability to all customers with Bedrock's existing security, privacy, and data controls. AWS executives Swami Sivasubramanian and Matt Wood emphasized Fable 5's ability to sustain long-running autonomous agent work — driving coding and knowledge tasks for days without intervention, and proactively verifying its own output.

The rollout wasn't frictionless: r/aws lit up (200+ upvotes) over reports that Bedrock will require sharing data with Anthropic for Mythos and future models, raising enterprise data-governance concerns that echo Microsoft's internal restriction of the same model. Initial Graviton5 availability in only four regions also drew complaints about constrained early adoption. Still, GA on the largest cloud the same day as launch is a notable distribution win for Anthropic.