ResearchResearch paperLarge Language Models1 source · Oct 8, 2026

Lapras: Latent Reasoning for Time Series Language Models

Time Series Language Models (TSLMs) offer a promising path toward time series understanding by reasoning over temporal signals and producing natural language answers and explanations.

Key points

  • Although these models learn from reference CoT traces during post-training, generating faithful descriptions of input time series at inference remains challenging.
  • We propose Lapras (Latent Post-trained Reasoning Across Series), a post-training framework that equips TSLMs with latent reasoning.
  • A model trained with Lapras reasons through a sequence of continuous thoughts in the joint time series-language space, producing text only for the final answer.
  • We evaluate Lapras across four TSLM backbones on five time series question answering benchmarks.

Sources (1)

  • [1]Lapras: Latent Reasoning for Time Series Language Models
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 8, 02:33 AM
    Time Series Language Models (TSLMs) offer a promising path toward time series understanding by reasoning over temporal signals and producing natural language answers and explanations.
    Although these models learn from reference CoT traces during post-training, generating faithful descriptions of input time series at inference remains challenging.

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