Model reference · open weights

Olmo-3-Think

Olmo-3-Think is an open-weight language model from allenai, listed in the AxForge catalogue. AxForge can bring it up on EU-owned hardware for you on request — with the licence handled where one is required.

LLMs allenai 2 variants 73k downloads/mo
Request this model on EU hardware All served models Not on the shared API today — deployed on request.

About

What Olmo-3-Think is

Model Details Model Card for Olmo 3 Think We introduce Olmo 3, a new family of 7B and 32B models both Instruct and Think variants. Long chain-of-thought thinking improves reasoning tasks like math and coding. Olmo is a series of Open language models designed to enable the science of language models. These models are pre-trained on the Dolma 3 dataset and post-trained on the Dolci datasets. We are releasing all code, checkpoints, logs (coming soon), and associated training details. The core models released in this batch include the following: Installation Olmo 3 is supported in transformers 4.57.0 or higher: Inference You can use OLMo with the standard HuggingFace transformers library: For faster performance, you can quantize the model using the following method: The quantized model is more sensitive to data types and CUDA operations. To avoid potential issues, it's recommended to pass the inputs directly to CUDA using: We have released checkpoints for these models. For post-training, the naming convention is stepXXXX. To load a specific model revision with HuggingFace, simply add the argument revision: Or, you can access all the revisions for the models via the following code snippet: Chat template Default System Message The default system prompt for this model is: Chat Format The chat template for this model is formatted as: Model Description - Developed by: Allen Institute for AI (Ai2) - Model type: a Transformer style autoregressive language model. - Language(s) (NLP): English - License: This model is licensed under Apache 2.0. It is intended for research and educational use in accordance with Ai2's Responsible Use Guidelines. - Contact: Technical inquiries: olmo@allenai.org. Press: press@allenai.org - Date cutoff: Dec. 2024. Model Sources - Project Page: https://allenai.org/olmo - Repositories: - Open-Instruct for DPO and RLVR: https://github.com/allenai/open-instruct - OLMo-Core for pre-training and SFT: https://github.com/allenai/OLMo-core - OLMo-Eval for evaluation: https://github.com/allenai/OLMo-Eval - Paper: [TBD] Evaluation Model Details Stage 1: SFT - supervised fine-tuning on the Dolci-Think-SFT-7B dataset. This dataset consits of math, code, chat,

Summarised from the published model card. Read the full card on the HuggingFace links below.

Specifications

What it is

Makerallenai
TypeLanguage models
Parameters (lead)7.3B
Context64k tokens
Variants2
Runs withtransformers
Based onallenai/Olmo-3-7B-Think-DPO
Released2025-11-18
Popularity73k downloads / month
Likes175
LicenceOpen weights

How it works

How language models work

Your prompttext / messagesTransformerattention over tokensNext-token loopgenerate + streamResponsetext · tool callsA language model reads your tokens and predicts the next one, again and again, streaming the reply back.

Variants

Sizes & precisions

Open weights ship in several sizes and precisions. One page, all the variants — pick the one that fits your GPU. VRAM figures are estimates from model size.

VariantParamsPrecisionVRAMFits 16 GBWeights
Olmo-3-7B-Think7.3BBF16~16.8 GBWeights ↗
Olmo-3-32B-Think32.2BBF16~74.1 GBWeights ↗

Using it via the API

Call it like any OpenAI endpoint

Once AxForge deploys olmo-3-think for you, it answers on the OpenAI-compatible API — the same base URL and keys as every other model. (olmo-3-think below is illustrative; you get the exact model name on deployment.)

$ curl -sS https://api.axforge.ai/v1/chat/completions \
  -H "Authorization: Bearer $AXFORGE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"olmo-3-think","messages":[{"role":"user","content":"Hello"}]}'

Details

Languages, data & research

Languages

en

Trained / evaluated on

allenai/Dolci-Think-RL-7B allenai/Dolci-Think-RL

Tags

transformers safetensors olmo3 text-generation conversational en dataset:allenai/Dolci-Think-RL-7B endpoints_compatible deploy:azure dataset:allenai/Dolci-Think-RL

Papers

Licence

Open weights

Open weights under apache-2.0 — commercial use is permitted. Deploy it on AxForge EU hardware on request. Read the licence ↗

Sources

Weights & code

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