Papers by Tim Leiber
The Price of Thought: A Multilingual Analysis of Reasoning, Performance, and Cost of Negotiation in Large Language Models (2026.findings-eacl)
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Sherzod Hakimov, Roland Bernard, Tim Leiber, Karl Osswald, Kristina Richert, Ruilin Yang, Raffaella Bernardi, David Schlangen
| Challenge: | Negotiation is a fundamental challenge for AI agents as it requires an ability to reason strategically, model opponents, and balance cooperation with competition. |
| Approach: | They propose to use a self-play setup to compare commercial and open-weight large language models to their vanilla counterparts in three different languages to examine trade-offs between performance and cost. |
| Outcome: | The proposed model improves GPT-5's performance by 31.4 % while increasing its cost by nearly 400 %. |