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OpenThinker3 1.5B by open-thoughts

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OpenThinker3 1.5B is an open-source language model by open-thoughts. Features: 1.5b LLM, VRAM: 3.1GB, Context: 32K, License: apache-2.0, Instruction-Based, LLM Explorer Score: 0.23.

  Arxiv:2506.04178 Base model:finetune:qwen/qwen2... Base model:qwen/qwen2.5-1.5b-i...   Conversational Dataset:open-thoughts/openthou...   Endpoints compatible   Full   Generated from trainer   Instruct   Llama-factory   Qwen2   Region:us   Safetensors
Model Card on HF 🤗: https://huggingface.co/open-thoughts/OpenThinker3-1.5B 

OpenThinker3 1.5B Benchmarks

LLME Score: 0.22836
nn.n% — How the model compares to the reference models: Anthropic Sonnet 3.5 ("so35"), GPT-4o ("gpt4o") or GPT-4 ("gpt4").
OpenThinker3 1.5B (open-thoughts/OpenThinker3-1.5B)
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OpenThinker3 1.5B Parameters and Internals

LLM NameOpenThinker3 1.5B
Repository 🤗https://huggingface.co/open-thoughts/OpenThinker3-1.5B 
Base Model(s)  Qwen/Qwen2.5-1.5B-Instruct   Qwen/Qwen2.5-1.5B-Instruct
Model Size1.5b
Required VRAM3.1 GB
Updated2026-06-03
Maintaineropen-thoughts
Model Typeqwen2
Instruction-BasedYes
Model Files  3.1 GB   0.0 GB
Model ArchitectureQwen2ForCausalLM
Licenseapache-2.0
Context Length32768
Model Max Length32768
Transformers Version4.46.1
Tokenizer ClassQwen2Tokenizer
Padding Token<|endoftext|>
Vocabulary Size151936
Torch Data Typebfloat16
Errorsreplace

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Note: green Score (e.g. "73.2") means that the model is better than open-thoughts/OpenThinker3-1.5B.

Rank the OpenThinker3 1.5B Capabilities

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Instruction Following and Task Automation  
Factuality and Completeness of Knowledge  
Censorship and Alignment  
Data Analysis and Insight Generation  
Text Generation  
Text Summarization and Feature Extraction  
Code Generation  
Multi-Language Support and Translation  

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