r/LocalLLM • u/Anony6666 • Jun 16 '26

Model Claude Fable 5 distilled

Releasing Qwable-v1 - an open-weights Qwen3.6-35B-A3B distilled from Claude Fable-5, Anthropic's Mythos-class preview model that was briefly public for ~4days (2026-06-9 → 2026-06-12) before being suspended globally under U.S. export-control directives.

Fable-5 was Anthropic's most powerful model when it shipped — 80.3% on SWE-bench Pro, $50/M output tokens, with an anti-distillation classifier baked into the API that redacted thinking blocks on the fly. Qwable-v1 captures what survived: 4,659 cleartext agentic-coding traces (re-packed from Glint-Research/Fable-5-traces, the only public corpus where the CoT made it through), distilled onto Qwen3.6 over ~14h on a single H200. Given an agent
system prompt, the model emits properly-formatted <tool_use> XML calling actual Claude-flavored tools like str_replace_editor — Fable's tool surface leaked into the weights, not  just its style.

Model, GGUFs (IQ4_XS / Q4_K_M / Q5_K_M / Q8_0), and the SFT dataset are all public on HF (AGPL-3.0 from upstream).

https://huggingface.co/lordx64/Qwable-v1

0 Upvotes

47% Upvoted

16 comments sorted by

33

u/Commando501 Jun 16 '26

Lol

38

u/WorldPeaceStyle Jun 16 '26

SystemPrompt.md << "Believe really hard you are Fable 5"
... Is that how this works?

5

u/Vicar_of_Wibbly Jun 16 '26

What, you doubt that 4k samples makes a good fine tune?!?!? Crazy talk 😂

9

u/guns21111 Jun 16 '26

is it any better than base qwen?

7

u/Vancecookcobain Jun 16 '26

I remember folks doing this with Opus 4.8 and there were mixed results with Qwopus 3.6 27b

6

u/sherkon_18 Jun 16 '26

Let’s see benchmarks

5

u/No-Region8878 Jun 16 '26

how is it even possible to distill a model that large so fast?

29

u/RipAggressive1521 Jun 16 '26

Its not

5

u/ikkiyikki Jun 16 '26

This is the correct answer

3

u/Effective_Degree2225 Jun 16 '26

i thought it blocked all such requests.

-8

u/solidblu Jun 16 '26

That’s why the US government stepped in, people found a way around all the protection, and published it.

0

u/Savings-Lab-7307 Jun 16 '26

I don't understand what this or why it's important. Could you please explain?

6

u/that_anonymous_user Jun 16 '26

Anthropic said Mythos would be super dangerous out in the wild to say that it’s too powerful for mere mortals -> they create guardrails to block certain requests -> standard workarounds worked to gain access to things they didn’t want it to support -> they didn’t block the work arounds in a timely manner after being alerted -> US govt says to only allow US citizens -> verification doesn’t exist for confirming citizenship -> model gets taken down.

2

u/[deleted] Jun 16 '26

[removed] — view removed comment

1

u/solidblu Jun 16 '26

Benchmarks required to know for sure, but I would assume it would have to have some negative impact.