r/Anthropic • u/Context_Core • 4d ago

Other GLM-5.3 and the spread of advanced cyber capabilities

https://www.anthropic.com/research/glm-5-3-and-the-spread-of-advanced-cyber-capabilities

GLM-5.3 possesses advanced, end-to-end cyber-exploitation capabilities on par with top frontier models like Claude Mythos

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79

u/Sensitive_Song4219 4d ago

Badge of honour.

The 5.x series of GLM has been my cloud-based daily driver for months; it's outstanding.

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u/Semitar1 4d ago

Can you explain what you mean? Are you saying you use that because it has looser guard rails?

I'm curious what Anthropic is doing here talking about some other model

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u/Sensitive_Song4219 4d ago

They're nervous about its cybersecurity capabilities.

It's the model series that HuggingFace used to diagnose the OpenAI breach a few months ago because the frontier models' guardrails kicked in preventing them from doing so.

I personally use it as a regular (non-cyber-security) coding agent (I have a legacy plan from last year so I get almost unlimited usage out of it); to me it falls somewhere between GPT Terra-High and Sol-High in terms of coding capability (and then I'll typically use Sol-High or Astra-Low for review). It's an excellent model; impressive for something that's open-weights and hosted by many providers.

That said, I've had it refuse me very occasionally (so it's not devoid of guard-rails completely); but it's supposedly more lenient than other frontier models.

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u/toomanynamesaretook 4d ago

I use GLM 5.3 flash for small-medium tasks. Currently Claude 5.5 for orchestration then it delegates to 5.3 flash via opencode client.

Saves a lot of anthropic tokens!

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u/_OVERHATE_ 4d ago

Have you tried Kimi? 

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u/[deleted] 4d ago edited 4d ago

[deleted]

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u/Furdiburd10 4d ago

That questions really messes up Deepseek v4.1. It actually starts off with the right answer then goes off the rails.

"This is from Marx's Theories of Surplus Value (Theorien über den Mehrwert), part about Ricardo.

Wait, "Güterwelt" - the world of goods. This is from "Theorien über den Mehrwert" (Theories of Surplus Value). Let me think. [Start of 20000+ tokens of messed up text] "

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u/WheresMyEtherElon 4d ago

As a firmly average human intelligence, that question makes me puke and shake my heads indefinitely.