AI Coding Live News

Reflection Publishes 156-Page Beam Technical Report: 23.8T-Token Pretraining, 4-Week Async RL on 10.5K GB300s, NVFP4 Keeps ~99% of Scores

On 2026-11-06 Reflection's official account released the Beam model technical report (a 156-page PDF), detailing how its 501.3B-total / 23.4B-active open-weight MoE was trained: 23.8T pretraining tokens on 6,144 GB300 GPUs in under four weeks, then a fully asynchronous RL run on about 10.5K GB300s for four weeks that produced over 100M rollouts. The report says FP8 and NVFP4 checkpoints keep 99.93% and 98.98% of median benchmark scores, and the 1.93B DFlash 2 drafter speeds single-request decoding 1.96–3.03x (vendor figures).

Reflection Publishes 156-Page Beam Technical Report: 23.8T-Token Pretraining, 4-Week Async RL on 10.5K GB300s, NVFP4 Keeps ~99% of Scores

Key Takeaways

  • Scale: 501.3B total / 23.4B active, 52 layers, 256 experts per layer with 8 active per token, 151,936-token vocabulary
  • Pretraining: 23.8T tokens on 6,144 GB300s in under four weeks, 92.3% goodput late in the run and 21% steady-state MFU
  • RL: about 10.5K GB300s for four weeks, 100M+ rollouts, 110K concurrent rollouts and 12-second weight updates; the report sees no plateau as RL compute grows
  • Serving: FP8 / NVFP4 keep 99.93% / 98.98% of median scores; DFlash 2 speeds single-request decoding 1.96-3.03x
  • Safety: 88.9% refuse/pivot on harmful requests and 81.5% compliance on harmless ones in in-house ISE; Limited in all four systemic-risk categories
Read full story
Linked Models & Agents:

DiffuSpace, founded by the HKU Dream team, open-sources Clover-35B-A3B, a diffusion LLM hitting 680 tokens/s on one GPU and 73.6 on SWE-bench Verified

On Oct 28 DiffuSpace, whose members come from the HKU NLP group behind Dream 7B, released its first model, Clover-35B-A3B-Preview: a mixture-of-experts diffusion language model initialized from Qwen3.6-35B-A3B, with 35B total and about 3B active parameters, a 128K context window and block-parallel denoising. Vendor-reported results include 73.6 on SWE-bench Verified, 51.7 on Terminal-Bench 2.1 and 83.8 on GPQA Diamond, with 680 tokens/s on a single GB300 in agent workloads. Weights are Apache 2.0 on Hugging Face, ModelScope and GitHub, with SGLang and llama.cpp support.

DiffuSpace, founded by the HKU Dream team, open-sources Clover-35B-A3B, a diffusion LLM hitting 680 tokens/s on one GPU and 73.6 on SWE-bench Verified

Key Takeaways

  • A 35B-total, roughly 3B-active MoE diffusion model initialized from Qwen3.6-35B-A3B, with 128K context and a thinking mode
  • DiffuSpace says it tops all six agent benchmarks it compared: SWE-bench Verified 73.6, Terminal-Bench 2.1 51.7 and tau3 Overall 65.3, ahead of LLaDA2.2 flash, Mercury 2.5 and Qwen3.6-35B-A3B
  • Speed (vendor-reported): 680 tokens/s on one GB300 at BF16 and batch size 1 in agent workloads, and 515 tokens/s on one H200 versus 365 tokens/s for Qwen with DFlash2
  • An INT4 build runs on a 16GB RTX 5070 Ti at 101.8 tokens/s on MATH-500
  • Weights on Hugging Face are Apache 2.0, about 69GB in BF16, and SGLang is the recommended serving path
Read full story
Linked Models & Agents:
⚡ Clover-35B-A3B-Preview⚡ Qwen3.6-35B-A3B⚡ Dream 7B⚡ LLaDA2.2 flash⚡ Mercury 2.5🌐 DiffuSpace🌐 HKU NLP🌐 Alibaba Qwen🌐 NVIDIA

vLLM Narrows Gap with DeepInfer to 6% on NVIDIA GB200, Reaching 1M Tokens/s per GPU on GB300

Hours after DeepSeek open-sourced DeepInfer, the vLLM project team released official benchmark parity data serving DeepSeek-V4.1-Flash. Utilizing DeepSeek's identical decoding setup (131K context window, nextn=3 speculative decoding), vLLM closed its throughput performance delta to within 6% of DeepInfer across batch sizes 8 through 256 on NVIDIA GB200 systems. On GB300 hardware, vLLM attained up to 1,000,000 tokens/second per GPU and 826 tokens/second per user, generating $38.96 in hourly GPU revenue at DeepSeek off-peak rates. vLLM simultaneously shipped day-0 runtime support for FastH3-Omni and Spark-X2.6-4B.

vLLM Narrows Gap with DeepInfer to 6% on NVIDIA GB200, Reaching 1M Tokens/s per GPU on GB300

Key Takeaways

  • vLLM published direct benchmark comparisons, demonstrating that its serving throughput on NVIDIA GB200 is within 6% of DeepInfer
  • Achieves unprecedented scaling on NVIDIA GB300: up to 1,000,000 tokens/second per GPU and 826 tokens/second per active user stream
  • Generates up to $38.96 per GPU-hour in revenue when mapped to DeepSeek's production off-peak API pricing schedule
  • Delivers immediate Day-0 support for the FastH3-Omni video model and the 1M-token Apache 2.0 model Spark-X2.6-4B
Read full story
Linked Models & Agents:

NVIDIA open-sources Flora, the robotics data engine behind GR00T: three models that caption and score robot video at roughly 1/125 the cost of GPT-6 Astra

On Oct 20, NVIDIA's GEAR lab (Jim Fan's team) open-sourced Flora, a model suite that turns human and robot manipulation video into timestamped action captions, process rewards, outcome rewards and rubric scores. It includes Flora-Captioner 27B and Flora-Rewarder 27B (both on Qwen3.5-27B) and Flora-TempSeg 9B (a LoRA on Qwen3.5-9B), with weights on Hugging Face under an NVIDIA non-commercial license. NVIDIA says it is the in-house data engine used to train GR00T, labeling 200,000 hours of video a day on 512 GB300s, matching GPT-6 Astra on annotation quality at roughly 125x lower cost.

NVIDIA open-sources Flora, the robotics data engine behind GR00T: three models that caption and score robot video at roughly 1/125 the cost of GPT-6 Astra

Key Takeaways

  • Three models: TempSeg 9B segments actions, Captioner 27B writes one instruction per segment, and Rewarder 27B outputs dense process rewards and an episode success score
  • Cost (NVIDIA estimate): about $0.72 per hour of source video on eight GB300s at $10 per GPU-hour, versus about $88.49 for GPT-6 Astra at maximum effort, a 122-125x gap
  • Quality (NVIDIA 50-episode internal eval): 57.1% for Flora versus 53.7% for GPT-6 Astra; failure recall on DenseRewardBench is 53.3% while frontier API models mostly score under 1%
  • Scale: NVIDIA says Flora labels 200,000 hours of video a day on 512 GB300s to train GR00T-2
  • License: NVIDIA OneWay Noncommercial, research only, with commercial and production use explicitly unsupported
Read full story
Linked Models & Agents:
⚡ Flora-Captioner 27B⚡ Flora-Rewarder 27B⚡ Flora-TempSeg 9B⚡ Qwen3.5-27B⚡ GPT-6 Astra⚡ GR00T-2🌐 NVIDIA🌐 Qwen🌐 OpenAI🌐 Hugging Face
ADSponsored

Meta details Prometheus, the gigawatt-scale supercluster that trained Muse Wonder: 85%+ pretraining goodput, 90%+ for RL, scaling toward ~1M GPUs

Meta's engineering blog on October 19 gave the first detailed look at Prometheus, the New Albany, Ohio supercluster that trained the Muse family, including Muse Wonder. Phase one is complete with hundreds of thousands of GPUs, and the full build targets about 1 million. Muse Wonder training reached more than 85% goodput in pretraining and more than 90% in reinforcement learning, with a mean time between interruptions of about 47K GPU hours, since raised above 54K by firmware fixes. It runs GB200 NVL72 and GB300 NVL72 platforms, with Vera Rubin NVL72 arriving soon.

Meta details Prometheus, the gigawatt-scale supercluster that trained Muse Wonder: 85%+ pretraining goodput, 90%+ for RL, scaling toward ~1M GPUs

Key Takeaways

  • Scale: phase one trained the Muse family; it has hundreds of thousands of GPUs today, targets about 1 million, and runs across buildings as a single machine.
  • Reliability: Muse Wonder hit 85%+ pretraining goodput and 90%+ for RL; MTBI was about 47K GPU hours and is now above 54K.
  • Interruptions: a mid-2025 peak of nearly 1,000 events per 8K GPUs per day was cut by 99% over a year of engineering.
  • Sparing: each NVL72 rack runs a 64-GPU slice with 8 in-rack spares, plus about 2% spare racks; a 32,768-GPU job needs 523 racks or 37,656 GPUs, about 13% extra.
  • Network: each building fabric links up to 20,736 GPUs, and the aggregation network spans 2 km to over 100 km.
Read full story

SemiAnalysis Discloses Google & Inferact TPUv7 Submission: TorchTPU vLLM Megakernels Drive 2.8T Kimi K3, Surpassing GB200 NVL72 and B300 in High-Interactivity TCO

SemiAnalysis revealed the first Google TPUv7 benchmark submission for the 2.8T Kimi K3 MoE model, led end-to-end by Inferact (the creators of vLLM) and Google using the TorchTPU vLLM stack. At a hardware rental cost of just $1.21/chip-hour (vs $2.31 for GB300 and $1.86 for GB200), TPUv7 delivers ~2.2M tokens per $1 TCO in the ultra-high interactivity regime (~390 tok/s/user), outpacing NVIDIA GB200 NVL72, B300, and AMD MI355X on cost-performance.

SemiAnalysis Discloses Google & Inferact TPUv7 Submission: TorchTPU vLLM Megakernels Drive 2.8T Kimi K3, Surpassing GB200 NVL72 and B300 in High-Interactivity TCO

Key Takeaways

  • Inferact (creators of vLLM) and Google submitted their first preliminary TPUv7 benchmark for the 2.8T Kimi K3 MoE model
  • TPUv7 chip rental sits at $1.21/hour, significantly below GB300 ($2.31), B300 ($2.26), and GB200 ($1.86)
  • Delivers ~2.2M tokens per $1 TCO at ~390 tok/s/user, beating NVIDIA GB200 NVL72, B300, and AMD MI355X in the ultra-high interactivity regime
  • Built with fused TorchTPU vLLM megakernels and the TPU-Sync KVCache offload library for production PD disaggregation
Read full story
Linked Models & Agents:

Kimi K3 Hits 842 tok/s on NVIDIA GB300 NVL72: NVIDIA and vLLM Unveil 12,000-Line CuTe DSL Decode Megakernel with 1.8x Higher AgentX Interactivity

vLLM and NVIDIA unveiled a unified CuTe DSL decode megakernel (~12,000 LoC authored by NVIDIA CentML's Benjamin Chislett) for Moonshot AI's frontier Kimi K3 model on NVIDIA GB300 NVL72. By fusing attention, MoE, and cross-GPU communication, the optimization cuts per-layer latency from 130 µs (23 kernels) to 69 µs (13 kernels), delivering 842 tokens/s at batch=1 with DSpark speculative decoding (1.73x faster than stock vLLM) and up to 1.8x higher P90 per-user interactivity (403.2–423 tok/s/user) on SemiAnalysis AgentX, with DeepSeek-V4.1-Flash (PR #61868) and GLM-5.3 support coming next.

Kimi K3 Hits 842 tok/s on NVIDIA GB300 NVL72: NVIDIA and vLLM Unveil 12,000-Line CuTe DSL Decode Megakernel with 1.8x Higher AgentX Interactivity

Key Takeaways

  • NVIDIA and vLLM introduce a 12,000-line CuTe DSL decode megakernel for the 2.8T-parameter Kimi K3, reducing per-layer execution from 23 kernels (130 µs) to 13 kernels (69 µs)
  • On 16x NVIDIA GB300 NVL72 GPUs, batch-1 decode hits 842 tok/s with DSpark speculative decoding (1.73x faster) and 256.4 tok/s without speculation (1.88x faster)
  • Delivers up to 1.8x higher P90 interactivity (403.2-423 tok/s/user) on SemiAnalysis AgentX, with DeepSeek-V4.1-Flash (vLLM PR #61868) and GLM-5.3 megakernels following next
Read full story
Linked Models & Agents:

vLLM and NVIDIA ship a specialized Kimi K3 decode path on GB300: 842 tok/s at batch 1, 1.3–1.9x faster without speculation

A vLLM blog post by NVIDIA engineer Benjamin Chislett details an agent-assisted CuTe DSL decode path for Kimi K3 on NVIDIA GB300 that fuses attention, MoE and NVLink communication, cutting per-layer time from 130 µs across 23 kernels to 69 µs across 13. With DSpark speculative decoding on 16 GPUs it reaches 842 tok/s at batch 1, 1.73x stock vLLM; PR #61867 was merged on Oct 16.

vLLM and NVIDIA ship a specialized Kimi K3 decode path on GB300: 842 tok/s at batch 1, 1.3–1.9x faster without speculation

Key Takeaways

  • 842 tok/s at batch 1 on 16 GB300 GPUs with DSpark (7 draft tokens, synthetic AL=6) vs 488 for stock vLLM, 1.73x (vendor figures)
  • Without speculation TP16 gains 1.62–1.92x (3,606 tok/s at batch 64); TP8 gains 1.31–1.58x
  • Per layer: 23 kernels and 130 µs down to 13 kernels and 69 µs
  • AgentX P90 interactivity 403.2 vs 223.7 tok/s/user (1.8x), though the baseline is an earlier 8-GPU run
  • The same fast-track approach now covers DeepSeek-V4.1-Flash (PR #61868, open); early Muse Spark Open results exceed 950 tok/s/user
Read full story

vLLM adds NVIDIA Vera Rubin NVL72 support: up to 7.84x per-GPU throughput over GB200 on AgentX with MiniMax M3

On Oct 9 the vLLM team, with Inferact, Red Hat and NVIDIA, shipped early Vera Rubin NVL72 support: CUDA 13.4 nightly images already serve DeepSeek, Kimi, GLM and MiniMax. Vendor-reported results: up to 7.84x per-GPU throughput vs GB200 on SemiAnalysis AgentX (MiniMax M3, matched interactivity) and up to 3.7x vs GB300 NVL72 on the MLPerf Inference v6.1 VLM benchmark (Qwen3-VL-235B-A22B).

vLLM adds NVIDIA Vera Rubin NVL72 support: up to 7.84x per-GPU throughput over GB200 on AgentX with MiniMax M3

Key Takeaways

  • Versus GB200 NVL72: 5x NVFP4 FLOPS, ~2.4x HBM4 bandwidth, 1.7x bidirectional NVLink, 2–4x faster softmax exponentials (vLLM blog)
  • AgentX with MiniMax M3: up to 7.84x per-GPU throughput at matched interactivity, 5.18x under a 150 TPS cap (vendor-reported, early)
  • MLPerf Inference v6.1: Qwen3-VL-235B-A22B on vLLM + Dynamo, up to 3.7x vs GB300 NVL72
  • CUDA 13.4 locality domains split MoE weights for ~1.2x average MoE-layer speedup in small-token decode
  • Image: vllm/vllm-openai:cu134-nightly (CUDA 13.4 + PyTorch 2.15)
Read full story

NVIDIA Vera Rubin Posts First On-Silicon Agentic Numbers: Up to 30x Throughput per MW vs GB300

NVIDIA published the first on-silicon benchmark metrics for its Vera Rubin architecture on long-horizon agent workloads, demonstrating up to 30x throughput per megawatt and 35x lower token cost versus GB300 NVL72.

Key Takeaways

  • Inference benchmarks rebased from short chat to multi-step agent coding workloads with deep context expansion;
  • Benchmarked against DeepSeek V4 Pro on SemiAnalysis AgentX real coding traces as the reference workload;
  • Delivers up to 30x throughput per megawatt and 35x lower token cost compared to GB300 NVL72.
Read full story
Linked Models & Agents:
⚡ DeepSeek-V4-Pro⚡ Nvidia Rubin
ADSponsored