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Reflection unveils 501B parameter open-weight model Beam for coding and agents

By PulseAugur Editorial · [3 sources] ·

Reflection has introduced Beam, a new 501 billion parameter open-weight model designed for coding, reasoning, and agentic tasks. The model was trained using a combination of extensive pretraining on 23.8 trillion tokens and high-compute reinforcement learning, utilizing 10.5K NVIDIA GB300 GPUs over four weeks. Beam aims to offer competitive performance against other large open-weight models like GLM-5.2 and Qwen 3.8-Max, with a particular focus on inference efficiency. AI

IMPACT Sets a new benchmark for open-weight models in coding and agentic tasks, potentially driving enterprise adoption due to its efficiency.

RANK_REASON Frontier-lab model release with system card.

Read on Mastodon — sigmoid.social →

AI-generated summary · Google Gemini · from 3 sources. How we write summaries →

Reflection unveils 501B parameter open-weight model Beam for coding and agents

How we ranked this

Signal score
21 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Frontier Release
Frontier-lab model release with system card.
Source corroboration
3 independent sources
Multiple independent publishers reporting the same story raises confidence that it's real and newsworthy.
Topics
model release, infra
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Same-day
Cluster formed today. Ranking reflects the current source set at time of score.

Full methodology in our editorial standards.

COVERAGE [3]

  1. Hacker News — AI stories ≥50 points TIER_1 English(EN) · Philpax ·

    Beam: Reflection's 501B open-weight model

  2. Mastodon — sigmoid.social TIER_1 English(EN) · [email protected] ·

    Beam: Reflection's 501B open-weight model https:// reflection.ai/blog/introducing -beam # ai

    Beam: Reflection's 501B open-weight model https:// reflection.ai/blog/introducing -beam # ai

    LINKS reflection.ai/…/introducing-beam
  3. Mastodon — sigmoid.social TIER_1 English(EN) · [email protected] ·

    Beam: Reflection's 501B open-weight model https:// reflection.ai/blog/introducing -beam Comments: https:// news.ycombinator.com/item?id=4 9969183 # HackerNews #

    Beam: Reflection's 501B open-weight model https:// reflection.ai/blog/introducing -beam Comments: https:// news.ycombinator.com/item?id=4 9969183 # HackerNews # Beam # Reflection # model # AI # open -weight # machinelearning

    LINKS reflection.ai/…/introducing-beam

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