Expired50% confidenceFactExact time
The Claude series naming lineage from Anthropic has never included any product line called "Fable," and "Fable 5," "OPUS 4.8," and "GPT 5.5" are all fabricated names.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/4/2026
First Seen
Valid until: 10/2/2026(expired)
Sources
Exposing the 'Claude Fable 5' Scam: A Guide to Identifying Fake AI Products
bilibiliGPT官方车队7/2/2026
Related Claims
Unverified截至文章撰写时，Anthropic官方并未发布任何名为'Fable 5'的模型72% similarUnverifiedAnthropic's Claude model naming scheme follows the Claude 1/2/3/3.5/4 series with sub-model designations of Haiku, Sonnet, and Opus, and has never featured a 'Fable' designation.66% similarUnverifiedAnthropic has not officially disclosed the specific types of bugs that occurred on Claude Opus 4's first day.64% similarUnverifiedAnthropic has never released a model version called 'Claude Opus 4.8'63% similarUnverifiedThe Claude series naming lineage includes: Claude 1, Claude 2, the Claude 3 series (Haiku, Sonnet, Opus), Claude 3.5, Claude 3.7, and subsequent versions; a product line named "Fable" has never existed.63% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/89288API
curl https://kongchang.com/api/v1/knowledge/claims/89288MCP
get_claim(id=89288)