# Vercel Claude Fable 5.1 now available on AI Gateway - Product: Vercel (https://whatsnew.fyi/product/vercel) - Vendor: Vercel - Date: 2026-09-01 - Original notes: https://vercel.com/changelog/claude-fable-5-1-now-available-on-ai-gateway - Permalink: https://whatsnew.fyi/product/vercel/releases/2026-09-01-claude-fable-5.1-now-available-on-ai-gateway What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'. --- Claude Fable 5.1 from Anthropic is now available on AI Gateway. Fable 5.1 improvements compared to previous Claude models are concentrated in long, multi-stage work like agentic coding, knowledge work… - **added** — Claude Fable 5.1 from Anthropic is now available on AI Gateway