Fable 5.2 on AWS, faster RAG in Bedrock, 83% less onboarding time at Northern Trust

Important AI news

Claude Fable 5.2 is available on AWS

Anthropic is shipping Fable 5.2 on Amazon Bedrock and the Claude Platform on AWS. The model targets demanding coding, math, and science tasks. Mythos 5.2 is only available via verification programs. An important operations aspect: Fable 5.2 is classified as a Covered Model, with up to 30 days of data retention and human safety review. On Bedrock the review is done by Amazon staff, you must set the aws_review setting before first use. Enterprise Frontier Safeguards allow Zero Data Retention until June 30, 2027 for eligible customers. The blog shows console launch and a Boto3 example. Fallback credits help with cost-neutral retry after a rejected cached request. You build the retry logic yourself.¹

Bedrock Managed Knowledge Base: Single shot, agentic, or passages only

Amazon Bedrock Managed Knowledge Base now supports three retrieval modes via one API. Retrieval-only returns just citations. Single-shot RAG searches once, then generates an answer. Agentic Retrieval plans multiple searches and iterates to an answer. You control this via maxAgentIteration from 0 to 5. Counting happens per model call. The last iteration is answer generation. A speculative first search does not count as an iteration. This lets you tune effort, cost, and quality per request without maintaining separate paths.²

Northern Trust speeds up client onboarding with Microsoft agent

Northern Trust and Microsoft report an AI-powered onboarding agent on Azure. It converts historical transaction data into the standard format of the reporting environment. The announcement says data prep time drops by 83% from two and a half weeks to three days and hits 96.5% F1 score on first pass. Excel and SharePoint are integrated, expert review stays in the process. Microsoft describes an eyes-off approach with anonymized data. The numbers come from the vendor announcement. There is no independent audit.³

Kuken Industries finds 70 years of drawings in minutes

OpenAI reports: Kuken Industries searches 70 years of engineering drawings with the OpenAI API. Engineers find the right drawing for a repair in 4.5 minutes on average instead of almost an hour. The figures come from the vendor.⁴

Highlights for your workday

• Dose RAG to fit: In Bedrock use retrieval-only for source texts, single shot for clear lookups, agentic retrieval for comparisons across multiple policies. This saves time and model calls on simple questions.²
• Test Fable 5.2 in the Bedrock console today: In the playground pick the model and set the aws_review mode first. Mythos 5.2 requires verification.¹
• Make legacy data reachable: Start a small search pilot with a bounded archive. Measure time to first correct hit and the relief in the team.⁴

Tools and updates

• llm-anthropic 0.31: CLI plugin with support for Fable 5.2 and Mythos 5.2. Test prompts quickly, requires an Anthropic API key. Note from the changelog: The mode “max” failed on a vision example due to token limits.⁵
• Replit Agent support: In chat view the agent checks incidents, docs, and known issues. Pro users let tickets auto-create, including debug details.⁶
• ChatGPT Desktop: SSH agent forwarding on remote machines. You can push private repos from there with your local credentials. Check your org’s security policies first.⁷

Try it in five minutes

Prerequisite: You have access to the Amazon Bedrock console.

1) Open Test → Playground and choose “Claude Fable 5.2” as the model. Make sure the aws_review mode is set appropriately in your project.

2) Send this prompt from the AWS post: “An S3 bucket serves 40 TB/month egress. Estimate the monthly egress cost at $0.09/GB, and state one architecture change, using AWS services, to cut it. Show the calculation, keep it under 120 words.”

3) Result and check: You see a short calculation and a concrete architecture change with an AWS service. Check two things. The cost math is correct. Exactly one actionable change is named that lowers egress costs.

A good find

skipped today.

Sources

1. Introducing Claude Fable 5.2 on AWS (aws.amazon.com)
2. Single-shot and agentic retrieval with Amazon Bedrock Managed Knowledge Base (aws.amazon.com)
3. Northern Trust and Microsoft Frontier Company collaborate to transform client onboarding through AI (news.microsoft.com)
4. Kuken Industries searches 70 years of drawings in minutes (openai.com)
5. llm-anthropic 0.31 (simonwillison.net)
6. @replit: Here’s what rolled out last week:

• Get support directly from Agent: it checks for incidents, docs, and known issues right in your chat • For Pro: Agent can file the ticket for yo (x.com) 7. ChatGPT Desktop forwards your SSH agent to remote machines (news.ycombinator.com)