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Open-weights model apex-flash-1 targets security research, rivals Claude Opus 5 High on cost

By PulseAugur Editorial · [1 sources] ·

Cantina Security, in collaboration with Yeta Labs, has introduced apex-flash-1, an open-weights large language model specifically designed for security research and vulnerability detection. Trained on 50 real-world vulnerability cases, the model achieved a 66.7% pass@1 rate on a held-out benchmark, outperforming its base model, GLM-5.3-Flash, and demonstrating a significantly lower cost per task compared to Anthropic's Claude Opus 5 High. Cantina positions apex-flash-1 as a controllable, locally runnable tool for security professionals, emphasizing its utility as a 'worker model' within larger security frameworks. AI

IMPACT Provides a cost-effective, controllable open-source tool for vulnerability research, potentially accelerating security analysis.

RANK_REASON Release of a specialized open-weights model for security research with benchmark results. [lever_c_demoted from research: ic=1 ai=1.0]

Read on MarkTechPost →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Open-weights model apex-flash-1 targets security research, rivals Claude Opus 5 High on cost

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18 / 100
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Tool
Release of a specialized open-weights model for security research with benchmark results. [lever_c_demoted from research: ic=1 ai=1.0]
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Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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model release, product
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High
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Breaking (< 6h)
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COVERAGE [1]

  1. MarkTechPost TIER_1 English(EN) · Michal Sutter ·

    Can an Open Model Do Security Research? Cantina’s apex-flash-1 Solves 40 of 60 Held-Out Bug Tasks

    <p>Cantina Security, with Yeta Labs, has released apex-flash-1, an open-weights model trained specifically for vulnerability research. It is a reinforcement learning fine-tune of Z.ai&#8217;s GLM-5.3-Flash, released on Hugging Face under the MIT license. Is it deployable? Yes, th…

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