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● LIVE Updated 1h ago · 12 sources tracked

A New Open-Weight Challenger to Anthropic, Reflection, Emerges

Reflection AI, an American start-up founded by Google DeepMind alumni and backed by Nvidia, has introduced its first open-weight artificial intelligence model named Beam. The 501-billion-parameter sparse Mixture-of-Experts model features 23 billion active parameters and is designed to handle coding, reasoning, and agentic workloads. Beam was trained on 23.8 trillion tokens utilizing curated web and proprietary licensed datasets, while its reinforcement learning phase used over 100 million rollouts across 10,500 Nvidia GB300 graphics processing units during a four-week training run.

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  • ✓ Reflection AI unveiled its first open-weight artificial intelligence model named Beam.
  • ✓ Beam is a sparse Mixture-of-Experts model with 501 billion total parameters and 23 billion active parameters.
  • ✓ The model was trained on 23.8 trillion tokens from the web and proprietary licensed datasets.
  • ✓ Beam's high-compute reinforcement learning run generated over 100 million rollouts on 10,500 Nvidia GB300 GPUs over four weeks.
🛡️ Source Corroboration: 12 independent reporting domains (95% confidence) ⏱ Read time: ~2 min

What changed

Reflection AI officially launched Beam, its first open-weight model, following previous reports of the start-up preparing a competitive alternative to Chinese labs.

Live updates

  1. Nvidia-Backed Reflection AI Unveils Beam Open-Weight Model

    Reflection AI, an American start-up founded by Google DeepMind alumni and backed by Nvidia, has introduced its first open-weight artificial intelligence model named Beam. The 501-billion-parameter sparse Mixture-of-Experts model features 23 billion active parameters and is designed to handle coding, reasoning, and agentic workloads. Beam was trained on 23.8 trillion tokens utilizing curated web and proprietary licensed datasets, while its reinforcement learning phase used over 100 million rollouts across 10,500 Nvidia GB300 graphics processing units during a four-week training run.

    Why it matters

    The launch positions Beam as a Western alternative to Chinese open models like DeepSeek and Qwen, as well as an open-weight challenger to U.S. frontier labs including Anthropic and OpenAI. Industry observers describe the release as an effort to counter corporate oligopolies in artificial intelligence by bringing powerful open-weight alternatives back into the market. Reflection AI's backing by Nvidia highlights ongoing hardware and strategic investments fueling the race for advanced open-source artificial intelligence systems.

    What is confirmed

    • Reflection AI unveiled its first open-weight artificial intelligence model named Beam.
    • Beam is a sparse Mixture-of-Experts model with 501 billion total parameters and 23 billion active parameters.
    • The model was trained on 23.8 trillion tokens from the web and proprietary licensed datasets.
    • Beam's high-compute reinforcement learning run generated over 100 million rollouts on 10,500 Nvidia GB300 GPUs over four weeks.
    • Reflection AI was founded by Google DeepMind alumni and is backed by Nvidia.

    Still unconfirmed

    • Reflection AI is valued at $25 billion.

    What to watch next

    • Independent benchmarking and performance evaluations comparing Beam against existing open-source and proprietary frontier models.
    • Adoption rates of Beam among enterprise developers and coding platforms.
    • Further disclosures from Reflection AI regarding commercial licensing and enterprise solutions.
    Sources used for this update (12)
    1. reuters.com — Nvidia-backed Reflection unveils first AI model to take on Chinese open models
    2. Semafor — Reflection AI unveils an open-source Western answer to Chinese labs
    3. Bloomberg.com — Nvidia-Backed Reflection Unveils Open AI Model, Taking on China
    4. Business Insider — What is Beam? The buzzy American AI model being called the 'DeepSeek of the West'
    5. The New York Times — A New Open-Weight Challenger to Anthropic, Reflection, Emerges
    6. Axios — "I don't want an oligopoly": New open-weight AI models mount a comeback against China
    7. Fortune — The U.S. has a new horse in the race to build the best open-source AI model
    8. reflection.ai — Introducing Beam: Reflection’s 501B open-weight model
    9. flipboard.com — A New Challenger to Anthropic Emerges
    10. en.wowtale.net — Reflection AI Launches Open-Weight Model 'Beam,' Pushing the ...
    11. startupfortune.com — Reflection AI readies a US open-weight model to challenge ...
    12. www.subvolts.com — Reflection AI Model Challenges Frontier Labs with Open-Weight ...
    confidence 95%
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