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@0xSero (tweeted 2026-06-16) says they are joining a challenge tied to an…

Brief

@0xSero (tweeted 2026-06-16) says they are joining a challenge tied to an unclaimed $25,000 OpenAI bounty to try to jailbreak GPT 5.6. Quoting am.will (@LLMJunky), the thread argues GPT 5.6 will face less scrutiny than Fable 5 because GPT guardrails are stronger; it notes @elder_plinius has public liberations for Opus/Sonnet/Fable but not a universal GPT 5.5 jailbreak.

Source evidence

I'm joining this.

am.will (@LLMJunky)

I do not believe GPT 5.6 will receive the same level of scrutiny as Fable 5 for a litany of reasons, and no, they're not all political.

The primary one being the fact that I suspect the guardrails on GPT models are more effective.

And there's an unclaimed $25,000 @OpenAI bounty to prove it.

While no model is completely impervious to jailbreaking, you will notice that @elder_plinius has never made a GPT 5.5 "pwned" or "universally liberated" post.

He surely did have some success though, and even went through an account ban, but unless he just didn't want to claim the prize, no universal jailbreaks have been successful...yet.

Pliny has LIBERATED announcements for every single Opus 4.x, Sonnet 4.x, and Fable models, often on the first day.

OpenAI red team network is probably the best in the world.

If you disagree, prove it. Claim the bounty.

— https://nitter.net/LLMJunky/status/2066606543164850671#m