Axis ⑧

Inference Infrastructure & Serving

66 records · 3 notes · records tagged with this as a related axis are included.

Running a model every day costs more than building it

Training happens once, but inference happens with every request. This axis records the work of making it cheaper and faster: memory-saving implementations of attention, scheduling that batches requests together, quantization that lowers precision, and distillation that passes a big model's answers on to a small one. It rarely makes headlines, but it's what actually sets a service's price and response speed, so watching this area shows you what will become possible next sooner than product announcements do.

Reflection
Reflection launches Beam, an open-weight model

It is the first model from a new US lab. Company-reported scores were SWEBench Verified 81.6%, GPQA Diamond 90.6%, AIME 2026 97.7% and Terminal Bench v2.1 80.1% (on BF16), and it ships in three versions, BF16, FP8 and NV

IBM
IBM releases Granite Switch 4.1

Because these are activated LoRAs, the KV cache built by the base model can be reused for the judgment that follows, and IBM said GPU memory with all three components added stays close to that of the base model alone. It

OpenAI
OpenAI unveils a bundle of announcements at DevDay 2026

The key is that speed has been split off into a separately billed tier. When latency becomes the bottleneck of agent loops, tokens per second become a product separate from quality, and investment in inference infrastruc

Martin Hickey (IBM Research), vLLM
Taking vLLM Apart: A Practical Guide to Disaggregated Serving

Disaggregated serving has come down from a research claim to an operational guide. The key is using p99 latency rather than average throughput as the yardstick, since agent loops are directly exposed to tail latency. It

OpenAI
OpenAI releases GPT-6.1 Sol

A mid-tier update released alongside Anthropic's Sonnet 5.5 in the same week. That two labs simultaneously touted "nearly the same work at 1/5 of the frontier price" shows the competitive axis of the second half of 2026

Tune thinking effort instead of swapping models

This rundown takes apart the announced metrics of a frontier lab's new top-tier model item by item, then tests them against four outputs made from the same prompt. The change singled out as most important is not the scor

The debate over a model that returns only probabilities instead of sentences

The back-and-forth over a model that, instead of answering a question in long sentences, returns only a number for how likely each predefined option is to be correct is laid out with the arguments of both sides. The crit

OpenAI
OpenAI revamps prompt caching for GPT-6

A change that brings to the API surface the fact that the cost of long-running agent loops depends on cache design. Taking tool-list changes and reasoning-effort adjustments off the list of reasons for cache invalidation

xAI
xAI releases Grok Voice Transcribe 2.0

With transcription prices down to 10–20 cents an hour, voice enters the range where all of it gets stored, like logs.

MultimodalOfficial
DeepSeek-AI
DeepSeek releases DeepSeek-V4.1-Flash

A case of pushing the diagnosis that the bottleneck for agent workloads has shifted from compute to KV-cache storage and bandwidth through the entire model design. Using different active parameters for prefill and decode

StepFun
StepFun publishes StepAudio 3 Realtime technical report

Full-duplex voice came from a Chinese lab as well, in the same week as OpenAI's GPT-Live-1 (Sep 10) and Google's Gemini 3.8 Live (Sep 15) — a stretch in which the voice interface settles from one lab's differentiator int

OpenAI
Scaling Storage for 1 Billion ChatGPT Users (Part I)

Leaves a first-hand record that the bottleneck of AI products has moved from models to stateful infrastructure, and is a case of a coding agent actually being put to work rewriting the company's core infrastructure.

Eight accelerators down to two: slimming the model decides the cost

This conversation answers the conventional wisdom about the race to secure accelerators, that whoever has the most wins, by agreeing with the premise but saying that is no longer the case. The example given as evidence i

d-Matrix
d-Matrix adopts NVIDIA NVLink Fusion for its Raptor XPU inference accelerator

A trend in which, as NVLink Fusion absorbs even competing inference silicon, NVIDIA's rack architecture is hardening into the de facto standard interconnect for AI data centers.

vLLM
vLLM releases a Tiered KV Cache Offloading framework

An inference-architecture shift in which, as long multi-turn and agent workloads become standard, the KV cache extends beyond GPU memory into the storage hierarchy.

vLLM, AMD, Embedded LLM
vLLM, AMD and Embedded LLM optimize MiniMax M3 on AMD Instinct MI355X

A record, in concrete numbers, of AMD GPUs being optimized in a major open inference engine into a real alternative to NVIDIA.

vLLM
vLLM publishes optimization results for SemiAnalysis's AgentX benchmark

As agentic coding becomes the representative workload of inference serving, the goal of benchmarks itself has shifted from one-shot throughput to the economics of long multi-turn sessions.

Cohere
Cohere releases decode megakernel serving engine for North Mini Code

A case showing that competition in inference optimization has moved down from schedulers and batching to the level of GPU kernel redesign.

vLLM
vLLM details Hybrid HiSparse offloading in GLM 5.3 optimization part 1

An attempt to handle contexts in the 1 million-token class on a single node; solutions to the memory bottleneck of long-context agents are converging on a combination of sparse attention and hierarchical memory.

Tenstorrent
Tenstorrent releases the vLLM TT plugin

Shows a path by which a non-mainstream accelerator joins the mainstream inference stack through a plugin that leaves the vLLM core untouched — the barrier to hardware diversification is coming down.

Sergii Kozyrev, Davyd Maiboroda
Sergii Kozyrev and Davyd Maiboroda release Minima

Overturns the conventional wisdom that "errors in recurrent state accumulate over long contexts", arguing that the recurrent half of a hybrid LLM is in fact the easier half to quantize, and offers four mechanistic explan

Heng Wang et al.
Researchers release Random Attention

Raises a counterargument against the entire lineage of importance-score-based KV eviction: "the scores themselves are unnecessary". The authors explain that only the prompt is fragile, while reasoning sequences sustain t

Hugging Face
Hugging Face releases @huggingface/kernels

A case of attacking, under an open license, the point that the bottleneck of on-device inference is kernel implementation rather than models. Per the company's report, it is 2.57 times faster than ORT WebGPU by geometric

Guowei Wang et al.
Researchers release AInfer-PD

A strand that, instead of P/D disaggregation, which requires separate device pools and KV-cache transfers, overlaps P and D on the same devices by isolating only collective-communication order and state while sharing wei

Google (Gemini API)
Google brings agentic video understanding to Gemini

Instead of feeding in a long video whole, the model explores it on its own — multimodal input is folded into the agent loop

MultimodalOfficial
Anthropic
Anthropic releases Claude Fable 5.1 and Claude Mythos 5.1

The competitive axis for frontier models shifts from coding to autonomous scientific research. Tiered deployment that opens the top model only to screened users has hardened into a product line, and the fact that the pri

Alexia Jolicoeur-Martineau, Rhea Sanjay Sukthanker, Pashmina Cameron, Emy Gervais
Sliding-window beats linear attention

A rebuttal paper that sets a baseline — "a sliding window that needs no post-training is enough" — against the strand of linear-attention retrofits that had been in the spotlight as a fix for quadratic scaling. The autho

NVIDIA
NVIDIA puts Groq 3 LPX into full production

A low-latency unit for agents is integrated into the rack

vLLM
vLLM adds sharded weight-transfer engine built on Ray Direct Transport

Multi-node model loading and weight swapping (RL rollouts) are promoted to first-class problems of the serving stack

AMD
AMD launches Helios rack-scale system and Instinct MI455X

72 GPUs per rack, a single scale-up domain and 31TB of HBM4 — alternative silicon entering real-world deployment

NVIDIA
NVIDIA's Vera Rubin NVL72 enters volume production

Integrates the Vera CPU, Groq 3 LPX, BlueField-4 and Spectrum-6, with agent workloads as an explicit target

Google (AI Edge)
Google makes LiteRT-LM generally available (GA)

The stage at which an on-device runtime covers not just mobile OSes but browsers with the same stack. Figures are the vendor's own measurements

Google Cloud (Cloud Next)
Google Cloud previews its 8th-generation TPUs at Cloud Next

Split training and inference silicon for the first time; a signal that the era of general-purpose accelerators is ending

Google Cloud
Google Cloud makes TPU7x generally available (GA)

Ironwood went from announcement to actual supply

vLLM
vLLM introduces Model Runner V2

The second rewrite of the execution layer since the V1 redesign. Serving competition moved from kernels to schedulers and execution cores

Hugging Face
Hugging Face archives the text-generation-inference repository

The README recommends moving to vLLM, SGLang, llama.cpp or MLX; the serving engine market consolidated into two leaders plus local

Zadouri, Shah, Thakkar, Dao et al.
FlashAttention-4

The latest generation of the kernel lineage, formally published at MLSys 2026

NVIDIA, Groq
NVIDIA takes non-exclusive Groq inference license, hires Jonathan Ross and team

Non-GPU inference IP is absorbed. Groq continues as an independent company

Google Cloud
Google Cloud announces Ironwood (TPU v7)

A TPU for the inference era. Actual GA came on Mar 31, 2026

NVIDIA
NVIDIA announces DGX Spark (ships Oct 15)

Inference on 200B models and fine-tuning of 70B models on a desktop; local machines become agent runtimes

DeepSeek
DeepSeek-V3.2-Exp

Puts fine-grained sparse attention into a commercial API and cuts long-context costs

NVIDIA
NVIDIA introduces NVFP4

A precise standardization of 4-bit precision

PyTorch Foundation
PyTorch Foundation takes in vLLM as a hosted project

The serving engine went from research project to infrastructure public good

SGLang (LMSYS)
SGLang reproduces large-scale EP on 96 H100s

An open-source reproduction of frontier-class MoE serving

Google
Gemma 3 QAT int4

Quantization-aware training became a standard step in open-weight releases

NVIDIA (GTC)
NVIDIA announces Dynamo at GTC

Explicitly targeted reasoning models, making PD disaggregation, KV routing and autoscaling a vendor standard

Epoch AI
Epoch AI measures how fast inference prices are falling

The first quantitative measurement breaking down, task by task, the steep drop in token prices at equal performance

DeepSeek
DeepSeek discloses the cost of its V3/R1 inference system

The first primary source on the unit economics of inference. DeepSeek itself cautioned that this is an upper bound assuming all usage is paid, and that actual revenue is much lower

DeepSeek
DeepSeek holds Open Source Week

Released, one per day over 5 days, working proof of large-scale EP, PD disaggregation and FP8

vLLM
vLLM releases its V1 engine in alpha

Made prefix caching the default; up to 1.7× faster than V0

xAI
xAI opens the Grok API in public beta

A strategy of lowering switching costs by adopting compatibility with competitors' APIs

xAI
xAI brings Colossus online in Memphis

The fastest build-out in the industry, by the company's own announcement. But the initial grid connection was only 8 MW, so it relied on temporary gas turbines, and was stepped up to 150 MW only in November

Cerebras
Cerebras launches Cerebras Inference

Used wafer-scale SRAM to get around the bandwidth limits of GPU HBM, popularizing the category of inference-only chips

Moonshot AI, Tsinghua (Qin et al.)
Mooncake

Tiered KV cache management grounded in a production service

NVIDIA
Blackwell platform

A paradigm that treats a whole rack as one giant GPU

Microsoft Research India (Agrawal et al.)
Sarathi-Serve

Solved the problem of long prompts stalling decode; 2.6–5.6× the serving capacity of vLLM

UCSD, PKU (Zhong et al.)
DistServe

Splits prefill and decode into separate GPU pools so that latency metrics can be tuned independently

LMSYS
LMSYS releases SGLang + RadixAttention

Brought a cache layer for workloads with overlapping prompts, such as multi-turn and agents, down to the runtime level

Zheng et al.
SGLang paper

Automatically reuses the prefix KV cache through a radix tree

Microsoft (Patel, Choukse et al.)
Splitwise

The first proposal in the prefill-decode disaggregation line

NVIDIA
NVIDIA announces H200

The first product to put memory capacity and bandwidth, rather than compute, forward as its generational differentiator

NVIDIA
NVIDIA releases TensorRT-LLM

Integrated in-flight batching, paged attention and FP8 into the vendor stack

llama.cpp community
llama.cpp community introduces the GGUF format

A single-file distribution format with metadata and backward compatibility — the container image of local model distribution

UC Berkeley
UC Berkeley releases vLLM + PagedAttention

Manages the KV cache like OS paging, cutting memory waste to under 4%; the starting point of the open-source serving standard

MIT Han Lab (Ji Lin et al.)
AWQ

Quantization that protects only the top weights as judged by activations; TinyChat runs more than 3× faster than HF FP16

Georgi Gerganov
Georgi Gerganov creates the llama.cpp repository

Dependency-free inference in pure C/C++ opened the way to running LLMs on a laptop without a GPU

DeepMind (Chen et al.)
Accelerating LLM Decoding with Speculative Sampling

An independent formulation of the same technique, with a 2–2.5× speedup

Google (Leviathan et al.)
Speculative Decoding

Sidesteps the memory-bound nature of decoding without changing the output distribution

Seoul National University (Gyeong-In Yu et al.)
Orca

The prototype of continuous batching