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Olmo-core 3

Olmo-core 3 is an open framework for developing and training large mixture-of-experts models. Its redesigned training system combines distributed training techniques and routing and computation optimizations, and has been benchmarked at over one trillion total parameters.

What it does

Researchers can use it to train models and study the decisions involved in training large mixture-of-experts systems.

Availability
Released ahead of COLM
Pricing model
Not established
Deployment
Researchers and developers can adapt it to different hardware
Privacy
Not established
Licence
Not established
Capability
training
Modality
code
Access
SDK
Deployment
on-premises
Pricing
unknown
Target user
developerresearcher

Evidence

9 claims
  • Olmo-core 3 is designed to scale MoE training into the trillion-parameter range. [1] [3]
    Olmo-core 3 is designed to scale MoE training into the trillion-parameter range while preserving computational efficiency.
    Ai2. Quoted text is outside CC BY 4.0 and keeps its original rights.
  • A benchmark increased the expert pool from 8 to 128 while training throughput fell by less than 5%. [1] [3]
    In one benchmark, we increased the expert pool from 8 to 128 while still selecting only four experts per token – the small units of text a language model processes – keeping the number of active parameters per token roughly fixed at about 3.2B.
    Ai2. Quoted text is outside CC BY 4.0 and keeps its original rights.
  • A preliminary test on eight NVIDIA B300 GPUs reported 52,000 tokens per second per GPU for a 47-billion-parameter MoE. [1] [3]
    In a preliminary test on eight NVIDIA B300 GPUs, a 47-billion-parameter MoE processed 52,000 tokens per second per GPU with the new stack, compared with 19,400 using our earlier implementation—about 2.7× the throughput.
    Ai2. Quoted text is outside CC BY 4.0 and keeps its original rights.
  • A benchmark tested a 1.2-trillion-parameter model across 512 NVIDIA B300 GPUs. [1] [3]
    We’ve benchmarked Olmo-core 3 across a range of configurations on NVIDIA B300 GPUs, including a 1.2-trillion-parameter model with 58.36 billion parameters active per token across 512 GPUs.
    Ai2. Quoted text is outside CC BY 4.0 and keeps its original rights.
  • Ai2 released Olmo-core 3 and linked to its code on GitHub. [1]
  • Researchers and developers can use the open stack to train their own MoEs and adapt it to different hardware. [1] [3]
    And it’s fully open—researchers and developers can use Olmo-core 3 to train their own MoEs, adapt it to different hardware, and experiment with routing, parallelism, and other parts of the system.
    Ai2. Quoted text is outside CC BY 4.0 and keeps its original rights.
  • Olmo-core 3 was released ahead of COLM. [2]
    Released ahead of COLM, Olmo-core 3 adds a redesigned system for training large mixture-of-experts models.
    Ai2. Quoted text is outside CC BY 4.0 and keeps its original rights.
  • Olmo-core 3 adds a redesigned system for training large mixture-of-experts models. [1] [2] [3]
    Released ahead of COLM, Olmo-core 3 adds a redesigned system for training large mixture-of-experts models.
    Ai2. Quoted text is outside CC BY 4.0 and keeps its original rights.
  • Researchers can use the code to develop their own models. [1] [2] [3]
    Researchers can use the code to develop their own models and investigate training decisions, alongside the checkpoints and technical reports available through the broader Olmo ecosystem.
    Ai2. Quoted text is outside CC BY 4.0 and keeps its original rights.

Sources

3
1
Ai2Owner-controlled
https://allenai.org/blog/olmocore3 Retrieved 2026-10-28 00:27 UTC
Verified
2
Ai2Owner-controlled
https://allenai.org/blog/colm-2026-recap Retrieved 2026-10-28 00:27 UTC
Verified
3
Hugging FaceOther
https://huggingface.co/blog/allenai/olmocore3 Retrieved 2026-10-28 00:27 UTC
Verified

Versions

2
VersionEffectiveChangeChanged fieldsState
22026-10-13 09:25 UTCmaterial changemodality, pricing, availabilityCurrent
12026-10-01 20:36 UTCpublicationNoneCurrent

In briefs

2

Open in the catalog

Original catalog content is licensed under CC BY 4.0, attributed to wowsuchai. Source quotations and linked content keep their original rights.