Claude Joins Your Slack Channel. Fable 5 Comes Back Online.

Welcome

I have not seen a week like this from Anthropic all year. Claude Sonnet 5 launched with real agentic gains at a price built for daily use, Fable 5 came back online after a 19 day export control shutdown, and Claude Tag turned Claude into a persistent Slack teammate. Sakana AI answered with a ready to use council-of-experts system, and this issue's Pro Tip shows exactly what a real multi-model setup costs with OpenRouter.

Below, I have 5 Quick Hits, 3 deep dives, a Pro Tip with a copy-ready council prompt, a Productivity Gem that adds a verify loop to any model, a Health Tip for forecasting energy from Apple Watch recovery signals, and a Kids Tip where a child can start programming a robot in a free browser simulation. Every item gives you something useful before you open the deep dive.

01 / Quick Hits

Claude Sonnet 5 is live. Pricing runs $2 per million input tokens and $10 per million output tokens through August 31, and Sonnet 5 is now the default model for Free and Pro plans. Read more ->

Fable 5 is back for everyone. It returned today on every core Claude surface plus AWS, 19 days after a Commerce Department export control order took it and Mythos 5 offline on June 12. Read more ->

Claude Tag puts Claude inside Slack. It joins as a persistent, memory-keeping teammate, in beta for Team and Enterprise plans. Read more ->

Sakana AI shipped Fugu. The trained conductor model routes one request across a pool of frontier models and hands back one synthesized answer. Read more ->

OpenAI previewed GPT-5.6. Sol, Terra, and Luna went to about 20 partner organizations, posting a sharp jump on a new genomics reasoning benchmark. Read more ->

02 / Top AI Updates

1. Claude Sonnet 5: Real Agentic Gains at a Price Built for Daily Use

Closes in on Opus 4.8 on many tasks at Sonnet pricing, including a 63.2% SWE-bench Pro score versus Opus 4.8's 69.2%. Live on AWS Bedrock, Google Vertex AI, and Microsoft Foundry with GA this week, and now the default model for Free and Pro plans.

Why it matters: I think this is frontier-adjacent performance most Executives can already afford. Switch your default model and test one real multi-step task this week.

Action items:

• Pick one real executive task this week that needs repeated multi-step reasoning.
• Run it once in Sonnet 5 and once with the current model you used before, then compare both outputs side by side.
• Capture one metric where quality improved, such as fewer revision loops or shorter response time.

2. Sakana Fugu Ships a Ready-to-Use Council of Experts System

Sakana AI's Fugu acts like a trained conductor for multiple frontier models, routing one request through a council and returning one synthesized answer instead of making you compare tabs by hand.

Why it matters: I think this is the practical version of model diversity. Use it for decisions where disagreement is valuable, not routine drafting.

Action items:

• Pick one decision where you would normally ask two or three models separately.
• Run it through Fugu or a similar council setup and require the final answer to name disagreements.