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Apex Flash 1

Cantina SecurityOpen WeightsPending Human Review

Apex Flash 1 is Cantina Security and Yeta’s reinforcement-learning post-training of GLM-5.3 Flash for focused software security investigations. It reads code, emits tool calls, investigates vulnerabilities, and verifies results in running targets. MIT-licensed weights are available, retaining the base model’s image-text architecture, although published evaluations cover text-based security tasks only. It is intended as a focused worker inside an agent harness. The standard checkpoint and an experimental abliterated derivative are distinguished; reported evaluation results apply to the standard checkpoint.

2026-10
321.3B
Vision-language Mixture-of-Experts Transformer
MIT

Specifications

Parameters
321.3B
Architecture
Vision-language Mixture-of-Experts Transformer
License
MIT
Type
multimodal
Modalities
textimage

Benchmark Scores

Advanced Specifications

Model Family
Apex
Finetuned From
GLM-5.3 Flash
API Access
Not Available
Chat Interface
Not Available
Variants
apex-flash-1apex-flash-1-abliterated (experimental, separate evaluation scope)

Capabilities & Limitations

Capabilities
security reasoningcode analysistool usevulnerability investigation
Known Limitations
Published evaluation covers only 60 tasks across 20 held-out casesImage and video behavior were not evaluatedRequires a harness and authorized test environment
Notable Use Cases
authorized vulnerability researchprivate security agentscode audits
Tool Use Support
Yes