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OrcaRouter (announced 2026-06-15) provides an open DSL that mimics Fable 5’s…

Brief

OrcaRouter (announced 2026-06-15) provides an open DSL that mimics Fable 5’s multi-model panel: a single prompt fans out to selected models, answers are judged and synthesized into one response. The team claims OpenRouter’s Fusion (released ~48 hours earlier) excelled at research but failed at coding, and OrcaRouter fixed that while giving users full YAML control and ownership.

Source evidence

Fable 5 got turned off, so OrcaRouter made the open version 🤯

Their new DSL lets you turn one prompt into a full AI panel.

You ask multiple models at once, let them solve the same problem independently, compare the answers, judge the strongest parts, and synthesize everything into one final output.

Basically Fable-style intelligence, but open, cheaper, and you hold the keys.

OrcaRouter 🐳 (@OrcaRouter)

Fable 5 is dead. We just resurrected it — cheaper, open and you hold the keys.

OpenRouter dropped Fusion 48h ago and broke the internet.

We tested it hard. The synthesizer is insane for deep research… but absolute dogshit for coding. So we fixed it.

Meet OrcaRouter.ai DSL — the version you actually own. One prompt → fans out to any panel you want
→ judge + synthesizer → one god-tier answer.

But unlike black-box slugs, you control the entire graph in YAML.

Fable 5 level intelligence… without waiting for Anthropic to turn it back on 🧵👇

— https://nitter.net/OrcaRouter/status/2066536847636144301#m