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Arcee AI

What Arcee AI does

Arcee AI is a U.S. open-weights model lab building the Trinity family of small language models and an enterprise-oriented tool stack for deploying, customizing, and operating them on infrastructure customers control (edge, on-prem, or cloud). The company positions “open-weight” as the core product strategy: Arcee releases model weights for inspection, fine-tuning, and production use, while also offering hosted access (API and “Chat for Free”) and enterprise onboarding that aims to reduce time-to-deployment for regulated and high-trust environments.

News

Company record

Aug 13, 2026 · Official · Arcee AI BlogIntroducing NAC, an Open-Source Harness for Long-Running Agent Work

Arcee released nac as an open-source runtime for long-running agent tasks, described as coordinating parallel agent workers and persistent state to prevent context loss over extended executions.

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Jul 22, 2026 · Official · Arcee AI BlogGenesis-Science-1 (GS1) announced with DOE and national laboratories

Arcee announced a joint development effort for Genesis-Science-1, describing it as an American open-weight model for scientific research and outlining Arcee’s role in compute, training/post-training, and releasing model artifacts later in the year.

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Jun 09, 2026 · Official · Arcee AI BlogWhy we made Hugging Face the home for everything we build

Arcee announced a partnership with Hugging Face, stating that the Hub becomes the exclusive home for its models, datasets, and agent traces it logs.

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May 29, 2026 · Official · Arcee AI BlogTrinity is moving to OpenMDW-1.1

Arcee announced moving the Trinity family to OpenMDW-1.1, described as a licensing standard for open AI model distributions, and indicated it covers the Trinity family and their quantized variants.

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Apr 14, 2026 · Official · Arcee AI BlogIntroducing the Trinity Builders Program

Arcee launched a community grant program offering free inference access on its API to developers, researchers, and open-source builders working with Trinity models.

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Apr 01, 2026 · Official · Arcee AI BlogTrinity-Large-Thinking: Scaling an Open Source Frontier Agent

Arcee announced the release of Trinity-Large-Thinking under Apache 2.0, describing its agent-focused reasoning approach and reporting usage and pricing claims for the model on OpenRouter and Arcee’s API.

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Jul 30, 2025 · Official · Arcee AI BlogArcee AI Secures Strategic Investment to Accelerate Enterprise-Grade AI Platform Built on AFM Foundation Models

Arcee announced a strategic funding round led by Prosperity7 Ventures and M12, with participation from Hitachi Ventures, Wipro, JC2 Ventures, Samsung Next, and Guidepoint CEO Albert Sebag; it described the funding as accelerating AFM-family expansion and enterprise productization.

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Jul 29, 2025 · Official · Arcee AI BlogAnnouncing the Official Launch of AFM-4.5B

Arcee announced taking AFM-4.5B out of preview and releasing AFM-4.5B and AFM-4.5B-Base weights on Hugging Face.

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Show 3 earlier updates
Jul 17, 2024 · Official · Arcee AI BlogOur Series A, Julien Simon Joins the Team, & Arcee Cloud Goes Live

Arcee announced its $24M Series A (Emergence Capital-led), the arrival of Julien Simon as Chief Evangelist, and the release of Arcee Cloud as a hosted platform version of its training/merging/deploying system.

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Mar 06, 2024 · Official · Arcee AI BlogArcee AI celebrates seed round & merger with mergekit

Arcee described a seed-round milestone that brought total funding to $5.5M and described its February merger with mergekit, including Charles Goddard joining Arcee.

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Date not disclosed · Official · Arcee AI BlogIntroducing the Arcee Open Models API Beta

Arcee launched an expanded “Open Models API Beta,” stating it includes Trinity-Large-Thinking and additional open models, describes it as built alongside nac, and publishes token pricing and launch-time credit details.

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Source map · 4 recurring channels · 36 references
Arcee AIOfficial Site · monitor↗Jacob Salowetz on XPrincipal X · monitor↗Mark McQuade on XPrincipal X · monitor↗MTS Frontier / Control RoomCurated Feed · monitor↗docs.arcee.aiOfficial Reference · reference↗Official company sourceOfficial Reference · reference↗sec.govRegulatory · reference↗aifeed.aiReporting · reference↗app.dealroom.coReporting · reference↗armkeil.blob.core.windows.netReporting · reference↗arxiv.orgReporting · reference↗axios.comReporting · reference↗caplight.comReporting · reference↗carlsquare.comReporting · reference↗cbinsights.comReporting · reference↗cdrdv2-public.intel.comReporting · reference↗crunchbase.comReporting · reference↗cumi-murugappa.comReporting · reference↗d1.awsstatic.comReporting · reference↗en.wikipedia.orgReporting · reference↗firebasestorage.googleapis.comReporting · reference↗futuriom.comReporting · reference↗g2.comReporting · reference↗globenewswire.comReporting · reference↗gunder.comReporting · reference↗higherlogicdownload.s3.amazonaws.comReporting · reference↗linkedin.comReporting · reference↗netris.ioReporting · reference↗oecd.orgReporting · reference↗podcasts.apple.comReporting · reference↗pr.aiReporting · reference↗reddit.comReporting · reference↗reinvent.awsevents.comReporting · reference↗sds-platform-private.s3-us-east-2.amazonaws.comReporting · reference↗seedgroup.comReporting · reference↗silverwoodpartners.comReporting · reference↗startupintros.comReporting · reference↗techcrunch.comReporting · reference↗theorg.comReporting · reference↗venturebeat.comReporting · reference↗

Still resolving: Newsroom · Official X

Funding

Latest disclosed valuationNot disclosed
Tracked capital$35M5 sourced rounds

What it builds

Trinity Models

Arcee’s Trinity family is presented as an open-weights model set with consistent capabilities across sizes, intended to run on-device/edge or in cloud deployments, with weights released under permissive licensing to avoid lock-in.

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Open Source Catalog

Arcee’s Open Source Catalog provides access to its released open-weight models and associated post-training/tooling libraries.

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Chat for Free

Arcee offers a free chat interface (“Chat for Free”) intended to give users an easy way to try models from the Trinity catalog.

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Arcee Open Models API (Beta)

Arcee launched an expanded “Open Models API Beta” intended to serve additional frontier open models beyond Trinity, and it states pricing for API tokens at launch.

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Arcee Cloud

Arcee Cloud is described as the hosted cloud version of Arcee’s end-to-end small-language-model training/merging/deploying platform.

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nac (open-source agent harness)

nac is Arcee’s open-source harness for long-running agent work, described as coordinating workers and persistent state so agent execution can continue across extended tasks without losing context.

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Key metrics

Milestones & partnerships

Jul 22, 2026
Genesis-Science-1 development announced with DOE

Arcee announced the Genesis Mission collaboration, stating it will support compute/training/post-training and system workbenches around an open model for scientific research.

U.S. Department of Energy (DOE)
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Jun 09, 2026
Hugging Face Hub becomes exclusive home for Arcee assets

Arcee stated that it entered a multi-million-dollar strategic partnership with Hugging Face and that the Hub becomes the exclusive home for models, datasets, and agent traces Arcee provides.

Hugging Face
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Apr 01, 2026
Trinity-Large-Thinking (reasoning-optimized) released

Arcee announced the release of Trinity-Large-Thinking on its API and on Hugging Face, describing it as a frontier open reasoning model built for long-horizon agents.

Hugging Face · OpenRouter
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Jul 30, 2025
Strategic enterprise-focused funding round

Arcee announced a strategic round led by Prosperity7 Ventures and M12 and outlined its enterprise product direction around AFM foundation models and toolkits.

Prosperity7 Ventures · M12 · Hitachi Ventures · Wipro · JC2 Ventures · Samsung Next · Guidepoint
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Jul 29, 2025
AFM-4.5B weights released on Hugging Face

Arcee announced the official release of AFM-4.5B weights and AFM-4.5B-Base on Hugging Face after taking AFM-4.5B out of preview.

Hugging Face
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Jul 17, 2024
Series A and launch of Arcee Cloud

Arcee described a $24M Series A led by Emergence Capital and released Arcee Cloud as the hosted platform version for its training/merging/deploying workflow.

Emergence Capital · Julien Simon
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Mar 06, 2024
Seed milestone and mergekit merger

Arcee reported a seed-round milestone and described a merger with mergekit, including Charles Goddard joining Arcee as part of Arcee’s model-merging strategy.

mergekit · Charles Goddard
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