Everyone talked about the marketing stunt that was Anthropic's gated Mythos model with an 83% result on CyberGym. OpenAI just dropped GPT 5.5, which scores 82% and is open for anybody to use.

I recommend anybody in offensive/defensive cybersecurity to experiment with this. This is the real data point we needed - without the hype!

Never thought I'd say this but OpenAI is the 'open' option again.

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tpurves 8 hours ago | parent | next [-]

The real 'hype' was that the oh-snap realization that Open AI would absolutely release a competitive model to Mythos within weeks of Anthropic announcing there's, and that Sam would not gate access to it. So the panic was that the cyber world had only a projected 2 weeks to harden all these new zero days before Sam would inevitably create open season for blackhats to discover and exploit a deluge of zero-days.

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greenavocado 2 hours ago | parent | next [-]

The GPT-5.5 API endpoint started to block me after I escalated with ever more aggressive use of rizin, radare2, and ghidra to confirm correct memory management and cleanup in error code branches when working with a buggy proprietary 3rd party SDK. After I explained myself more clearly it let me carry on. Knock on wood.

So there is a safety model watching your behavior for these kinds of things.

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Salgat 3 hours ago | parent | prev | next [-]

It's almost embarrassing how susceptible we are to these marketing campaigns.

	▲	esjeon 3 hours ago \| parent [-]
		Lack of information, lack of knowledge. The “AI” “technology” is an easy excuse to create artificial information gap in the era of the interconnected.

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7 hours ago | parent | prev [-]

[deleted]

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concinds 7 hours ago | parent | prev | next [-]

> Never thought I'd say this but OpenAI is the 'open' option again.

Compared to Anthropic, they always have been. Anthropic has never released any open models. Never released Claude Code's source, willingly (unlike Codex). Never released their tokenizer.

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unsupp0rted 6 hours ago | parent | prev | next [-]

Doesn't OpenAI get mad if you ask cybersecurity questions and force you to upload a government ID, otherwise they'll silently route you to a less capable model?

> Developers and security professionals doing cybersecurity-related work or similar activity that could be mistaken by automated detection systems may have requests rerouted to GPT-5.2 as a fallback.

https://developers.openai.com/codex/concepts/cyber-safety

https://chatgpt.com/cyber

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merlindru 3 hours ago | parent | next [-]

Anthropic has started to ask for IDs for use of their products period

I don't like that trend. I get why they're doing it, but I don't like it

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brigandish an hour ago | parent [-]

Are you in the UK? I've not had this happen to me (I'm not in the UK) so I'm wondering if the Online Safety Act has affected this, as it has with other products.

	▲	litigator 31 minutes ago \| parent [-]
		[dead]

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deaux 5 hours ago | parent | prev [-]

They flatout gate any API access of the main models behind Persona ID verification. Entirely.

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willsmith72 7 minutes ago | parent | prev | next [-]

Being "more" open than something totally closed doesn't make you open. The name is still bs

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tnkuehne 9 hours ago | parent | prev | next [-]

isnt it like cyber question are being routed to dumper models at openai?

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jfkimmes 8 hours ago | parent [-]

Do you have a source for that?

Neither the release post, nor the model card seems to indicate anything like this?

	▲	tech234a 8 hours ago \| parent \| next [-]
		I see it here https://developers.openai.com/codex/concepts/cyber-safety
	▲	nikanj 8 hours ago \| parent \| prev [-]
		Anything that even vaguely smells like security research, reverse engineering or similar "dual-use" application hits the guardrails hard and fast. "Hey codex, here is our codebase, help us find exploitable issues" gives a "I can't help you with that, but I'm happy to give you a vague lecture on memory safety or craft a valgrind test harness"

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ur-whale 7 hours ago | parent | prev | next [-]

> Anthropic's gated Mythos model

aka the perfect marketing ploy

	▲	xtracto 4 hours ago \| parent [-]
		Reminds me of Gmail's early invite only mode.

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6 hours ago | parent | prev | next [-]

[deleted]

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_the_inflator 4 hours ago | parent | prev [-]

I ignore any hype news.

Anthropic is the embodiment of bullshitting to me.

I read Cialdini many decades ago and I am bored by Anthropic.

OpenAI is very clever. With the advent of Claude OpenAI disappeared from the headlines. Who or what was this Sam again all were talking about a year ago?

OpenAI has a massive user advantage so that they can simply follow Anthropic’s release cycle to ridicule them.

I think it is really brutal for Anthropic how they are easily getting passed by by OpenAI and it is getting worse with every new GPT version for Anthropic.

OpenAI owns them.

	▲	thinkthatover 3 hours ago \| parent [-]
		Who's Sam again? oh that person whose house was molotov'd last week? Or the person who had an expose written in the new yorker calling him a sociopath? I forget.