Rumor: Anthropic to Release Multiple New Models Within Days

Rumors say Anthropic will soon release several new models—possibly Opus 5.1, Sonnet 5.1, Haiku 5 and a mysterious Fable 5.1—with some leakers most excited about Fable's continued coding lead.

2026-08-24 ~ 2026-08-24 · 2 related posts

• Rumor: Anthropic testing Haiku 5 and Sonnet 5.1 instead of Fable 5.1 — ChrisGPT · 2026-08-24
• Rumor: Anthropic to drop Opus 5.1, Sonnet 5.1 and mystery Fable 5.1 within days — bindureddy · 2026-08-24