Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work

Businesses spend just 11% on Anthropic's smartest AI model, weeks before a $2 TRILLION IPO. Fable 5 has stalled at 11% of client spending across 70,000 companies, with cheaper models handling the same work, per FT. Anthropic's own cheaper Opus 5 has already overtaken its flagship. @aipost 🏴

📰 Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work Anthropic says its newest AI models, Fable 5.1 and Mythos 5.1, address criticisms from customers about price, data retention, and overzealous safeguards. The company claims Claude Fable 5.1 offers ... 📰 Source: The Verge 🔗 Link: https://www.theverge.com/ai-artificial-intelligence/987830/anthropic-claude-fable-mythos-5-1 # AI # ArtificialIntelligence # DataScience

🤖 Claude 5.1 Puts Science to the Test Anthropic released Claude Fable 5.1 and Claude Mythos 5.1, the same model with different restrictions. Fable is open to everyone. Mythos requires verification for cybersecurity and life sciences work. With open protein-design tools, almost 50% of designs worked across 12 targets, versus 10-15% normally. Binding affinity was 10 times higher than leading Adaptyv Bio contest entries for 3 targets. The model also built a new elevation map for a third of Venus from Magellan radar images. Resolution improved to 2 to 3 km. Terminal-Bench-Science reached 52.6%, up from 24.7%. Cached reads are 75% cheaper, cutting typical task costs by about 25% and agentic costs by up to 45%. 📊@tech

Notes Average Inference Time: 40m 12s Fable 5 averaged 18m 04s Total Cost (for 15 builds): $ 147.55 Fable 5 cost $54.93 Average JSON Size: 34.07 MiB (largest 88.76 MiB) Roughly comparable to Fable's 5 average of 30.65 MiB Despite no change in API pricing, Fable 5.1 was nearly 3x as expensive as Fable 5 on MineBench. With roughly 2x the inference time, much of that difference appears to come from substantially longer reasoning. The price increase is quite significant considering Anthropic advertises the same API prices, though it still is massively cheaper than GPT 5.6 Sol Pro (the current top model on the leaderboards). I find that quite interesting as in my personal usage, GPT 5.6 Sol is extremely efficient with my Pro subscription, though MineBench benchmarked 5.6 Sol Pro and not the sta