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Morning Edition · Tuesday, September 15, 2026Published at 2:27 AM EDT · New York
Claude Fable 5.1 more than doubles its predecessor on an agentic science benchmark
Anthropic reports 52.6% on Terminal-Bench-Science 0.1 against 24.7% for Fable 5, holds sticker pricing at $10 and $50 per million tokens, and cuts cache reads by 75%.
The capability numbers behind this week's slowdown argument are worth stating plainly: they are why the pacing argument exists in the first place. Anthropic released Claude Fable 5.1 and Claude Mythos 5.1 on September 1, three months after…
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Frontier Labs Race on AI Coding Capability
Coding is becoming a primary competitive battleground among frontier labs, with incumbents standing up permanent coding teams and investing in new training stages (e.g. midtraining) to match leaders like Anthropic; expect recurring reorganizations, benchmarks, and model releases aimed specifically at code.
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