Rumor: Anthropic's Next Model Offers Only Marginal Gains as Closed-Source AI Progress Stalls

Rumors claim Anthropic's next model Mythos brings only marginal gains over a disappointing Fable, and Abacus.AI's CEO relayed reports that closed-source AI progress has completely stalled, with Anthropic's internal models kept unreleased.

2026-08-15 ~ 2026-08-15 · 2 related posts

• Rumors: Anthropic's Next Model Marginal, GPT-6 Seen as Major Competitor — robleclerc · 2026-08-15
• Anthropic's next model won't ship externally; closed-source AI progress said to be paused — bindureddy · 2026-08-15