aws

Anthropic confirmed unauthorized users accessed its Mythos vulnerability detection model through a third-party vendor environment by guessing URL patterns. Early analysis from Mozilla and AWS indicates Mythos performs on par with elite human security researchers rather than surpassing them, despite Anthropic's claims of identifying thousands of critical vulnerabilities.

Amazon has introduced stateful MCP client capabilities on Bedrock AgentCore Runtime, enabling agents to pause mid-execution for user input, request LLM-generated content, and stream real-time progress updates. The update transforms one-way tool execution into bidirectional conversations between MCP servers and clients, supporting interactive workflows previously impossible with stateless implementations.

Amazon Bedrock now supports Reinforcement Fine-Tuning (RFT) for customizing Amazon Nova and open source models using reward signals instead of labeled datasets. AWS reports up to 66% accuracy improvements over base models with reduced customization complexity. The approach works best for tasks with verifiable correctness (code, math) or subjective evaluation (moderation, summarization).

Amazon has released a serverless architecture solution using Bedrock Guardrails that dynamically selects safety policies based on user age, role, and industry. The solution enforces five specialized guardrails—including COPPA-compliant child protection and healthcare-specific policies—at inference time to prevent prompt injection attacks and ensure context-appropriate responses.

Amazon has released a new Bidirectional Streaming API for Amazon Polly that enables simultaneous text input and audio output over a single HTTP/2 connection. The API reduces end-to-end latency by 39% compared to traditional request-response TTS by allowing text to be sent word-by-word as LLMs generate tokens, rather than waiting for complete sentences. The feature is available in Java, JavaScript, .NET, C++, Go, Kotlin, PHP, Ruby, Rust, and Swift SDKs.

Amazon Bedrock has introduced three distinct video analysis workflows that leverage multimodal foundation models to extract insights from video content at scale. The approaches—frame-based, shot-based, and multimodal embedding—are designed for different use cases and cost-performance trade-offs, with open-source reference implementations available on GitHub.

Amazon Web Services has integrated Claude's tool use (function calling) capability into Bedrock, enabling serverless document processing for custom entity recognition. The solution uses Claude 3.5 Sonnet to extract structured data like names, dates, and addresses from driver's licenses and other documents without traditional model training.

Amazon Bedrock now offers NVIDIA's Nemotron 3 Nano as a fully managed serverless model, expanding its Nemotron portfolio alongside previously available Nemotron 2 Nano 9B and Nemotron 2 Nano VL 12B variants. The addition enables developers to deploy NVIDIA's smallest inference-optimized model without managing infrastructure.

Amazon Bedrock now enables access to Anthropic Claude models in India with global cross-region inference support. The service allows developers to build generative AI applications with Claude variants across AWS regions.