Improving Language Models through Learning from Dialogue Interaction   Co-located with EMNLP 2026 — 28 October 2026, Budapest Website: <https://lm-playschool.github.io/> Starter Kit: <https://github.com/lm-playpen/playpen> The submission deadlines for the LM Playschool Workshop are almost here! **The challenge submission deadline is this Sunday, July 5, 2026 (2 days away!)**, followed shortly by the direct paper submission deadline on July 12, 2026 (9 days away!). 📝 SUBMISSION TRACKS   We welcome either long or short submissions for the following tracks: 1\. Challenge track: Technical reports for the LM-Playschool challenge (archival). 2\. Paper-only track: Work-in-progress (archival or non-archival) or recently published papers (non-archival). 🏆 CHALLENGE TRACK (SHARED TASK)   The shared task focuses on post-training LLMs to master communicative skills in unseen dialogue games while retaining original language capabilities. Participants are free to choose any base model; evaluation is based on improvement relative to that base model on an unseen test set. Not signed up yet? Register here: <https://forms.gle/fhpXPH5kZk4psPXp9>  🛠️ STARTER KIT   Our sandbox environment Playpen is available on GitHub and ready to use. Key features: \* Comprehensive Evaluation: A single command to get your "clemscore" (interactive competence) and "statscore" (classic benchmarks). \* Training Recipes: Example scripts for SFT and GRPO to help models learn from game-state success. \* Resource Friendly: We encourage using the Qwen3.5 family (0.8B to 27B) to ensure participation is possible with modest compute. 🎯 PAPER-ONLY TRACK: TOPICS OF INTEREST   We welcome original research and work-in-progress on: \* Architectures and training regimes for interactive agents. \* Intrinsic rewards and learning signals (RL from game-state success). \* Benchmarking via dialogue games. \* Data efficiency and social interaction. \* Social cognition and Theory of Mind in interactive systems. \* Human-agent collaboration and coordination. \* Embodied interactive agents. \* Communicative and perceptual grounding. 📅 IMPORTANT DATES \* **Challenge submission deadline: July 5, 2026 (only 2 days away!)** \* Direct paper submission deadline: July 12, 2026 (9 days away!) \* Pre-reviewed ARR commitment deadline: August 2, 2026 \* Notification of acceptance: August 8, 2026 \* Camera ready due: August 23, 2026 \* Challenge winners announced: Early October 2026 \* Workshop at EMNLP 2026: October 28, 2026 — Budapest For more information, visit our website: <https://lm-playschool.github.io/>  We look forward to your submissions! \ The LMP 2026 Organizing Committee:   Raffaella Bernardi, Raquel Fernández, Mario Giulianelli, Sherzod Hakimov, Alexander Koller, Dieu-Thu Le, Oliver Lemon, Davide Mazzaccara, Sabrina McCallum, David Schlangen, Alessandro Suglia