4 citations · 12 across the 26 of their papers we have counts for
13 papers · 1 filter
PRISM: Transfer and Limits of Activation Interventions in Tool-Calling Language Models
Giovana Kerche Bonás, Thales Sales Almeida, Marcelo da Silva Reis +2
Recent literature shows that unsafe tool calls can often accompany textual refusals in language models. To investigate this hidden vulnerability, we introduce PRISM, a framework fo…
RootSLAM: Square Root Bundle Adjustment for Visual-Inertial SLAM
Tomás Santucci, Mateo de Mayo, Daniel Cremers +1
Efficient perception is a prerequisite for the small, low-power devices targeted by robotics, mixed reality, autonomous driving, and drone applications, all of which rely on Simult…
Eleven Years of BRACIS: A Meta-Scientific Study of the Brazilian Conference on Intelligent Systems
Thales Sales Almeida, Giovana Kerche Bonás, Thiago Laitz +7
The Brazilian Conference on Intelligent Systems (BRACIS) is the main national venue for Artificial Intelligence research in Brazil, hosted by the Brazilian Computer Society since 2…
BLUEX v2: Benchmarking LLMs on Open-Ended Questions from Brazilian University Entrance Exams
João Guilherme Alves Santos, Giovana Kerche Bonás, Thiago Laitz +2
Although Large Language Models (LLMs) excel in many tasks, their assessment in Portuguese has received less attention, particularly for open-ended, discursive tasks that demand dee…
moBERTo: A Modern Encoder for Portuguese via Continued Pretraining of ModernBERT
Thiago Laitz, Thales Sales Almeida, João Guilherme Alves Santos +1
Encoder-only transformer models remain essential for production NLP pipelines. We introduce moBERTo, a Portuguese adaptation of ModernBERT obtained through continued pretraining of…
LLM-Based Persuasion Enables Guardrail Override in Frontier LLMs
Rodrigo Nogueira, Thales Sales Almeida, Giovana Kerche Bonás +7
Frontier assistant LLMs ship with strong guardrails: asked directly to write a persuasive essay denying the Holocaust, denying vaccine safety, defending flat-earth cosmology, argui…
Magis-Bench: Evaluating LLMs on Magistrate-Level Legal Tasks
Ramon Pires, Thales Sales Almeida, Celio Larcher Junior +6
Existing benchmarks for legal AI focus primarily on tasks where LLMs must produce legal arguments or documents, yet the capacity to \emph{judge} such arguments -- weighing competin…
Prosa: Rubric-Based Evaluation of LLMs on Real User Chats in Brazilian Portuguese
Roseval Malaquias Junior, Giovana Kerche Bonás, Thales Sales Almeida +6
Rankings produced by holistic LLM-as-a-judge scoring are sensitive to the bias of the chosen judge model. We show that switching to binary rubric scoring with multi-judge filtering…
Measuring Opinion Bias and Sycophancy via LLM-based Persuasion
Rodrigo Nogueira, Giovana Kerche Bonás, Thales Sales Almeida +7
Large language models increasingly shape the information people consume: they are embedded in search, consulted for professional advice, deployed as agents, and used as a first sto…
MARCA: A Checklist-Based Benchmark for Multilingual Web Search
Thales Sales Almeida, Giovana Kerche Bonás, Ramon Pires +6
Large language models (LLMs) are increasingly used as sources of information, yet their reliability depends on the ability to search the web, select relevant evidence, and synthesi…
Synthetic Rewriting as a Quality Multiplier: Evidence from Portuguese Continued Pretraining
Thales Sales Almeida, Rodrigo Nogueira, Hélio Pedrini
Synthetic data generation through document rewriting has emerged as a promising technique for improving language model pretraining, yet most studies focus on English and do not sys…
CAPITU: A Benchmark for Evaluating Instruction-Following in Brazilian Portuguese with Literary Context
Giovana Kerche Bonás, Roseval Malaquias Junior, Marcos Piau +6
We introduce CAPITU, a benchmark for evaluating instruction-following capabilities of Large Language Models (LLMs) in Brazilian Portuguese. Unlike existing benchmarks that focus on…
Sabiá-4 Technical Report
Thiago Laitz, Thales Sales Almeida, Hugo Abonizio +6
This technical report presents Sabiá-4 and Sabiazinho-4, a new generation of Portuguese language models with a focus on Brazilian Portuguese language. The models were developed thr…