3 min read
DeepSeek V4 Pro on AgentX: MI355X vs B200, and the August 21 Flip
AMD matched B200 vLLM on performance per dollar for end-to-end latency, then upstream vLLM work moved the line
- agentx
- agentic
- benchmark
- +6
InferenceX Research
Articles
Benchmark write-ups on agentic inference, AgentX results, and chip and serving-stack economics.
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Tagged “mi355x”
9 articles
2 min read
GLM 5.3 on AgentX: MI355X ATOM Beats GB300 NVL72 on Part of the Curve
Where AMD’s vendor engine wins on performance per dollar, and what E2E Normalized Interactivity actually measures
- agentx
- agentic
- benchmark
- +9
2 min read
GLM 5.3 on AgentX: NVIDIA Is Up to 5x Cheaper per Token at 150 tok/s/user
At this operating point, free AMD silicon would still not close the gap
- agentx
- agentic
- benchmark
- +8
2 min read
Kimi K3 on AgentX: MI355X ATOM Beats GB300 NVL72 on Part of the Curve
AMD’s vendor engine wins a real slice of the performance per dollar frontier, while Hopper struggles to serve K3 at all
- agentx
- agentic
- benchmark
- +8
29 min read
DeepSeekV4 1.6T Day 0 to Day 43 Performance Over Time — Huawei, GB300 NVL72, MI355X, B200
Day 0 Inference Performance, InferenceX, 100x performance improvement in 26 Days, Cost per Million Tokens, Huawei 950DT Inference Trace Analysis
- benchmark
- gpu
- inference
- +13
13 min read
MI355X DeepSeek-V4-Pro on SGLang: 110.5x Throughput per GPU in 26 Days
The amd/deepseek_v4 side branch shipped TileLang attention indexer, Triton sparse MLA, fused RoPE/Hadamard, FlyDSL MoE, and FP4 weights across 31 performance optimizations PRs — lifting first-light 20 tok/s/GPU at 2.4 tok/s/user into 2,256 tok/s/GPU at 9.4 tok/s/user on 8K/1K, with both throughput and interactivity climbing together
- benchmark
- gpu
- inference
- +6
7 min read
AMD MI355X GLM-5 Inference: Up to 40% Cheaper per Million Tokens than B200 on SGLang FP8
14 weeks after GLM-5 launched, AMD landed both MTP and non-MTP SGLang FP8 recipes on MI355X — fused MLA + FP8 KV cache via TileLang flips the single-node FP8 cost curve in AMD favor across most of the performance Pareto
- benchmark
- gpu
- inference
- +7
6 min read
AMD MI355X Qwen3.5 397B-A17B Inference: Up to 19x Throughput per GPU in 3 Months on SGLang FP8
From v0.5.8 (Feb) → v0.5.10rc0 (Apr) → v0.5.12 (May), three AITER kernel landings on MI355X plus a TP=8 → TP=2/TP=4 retune push Qwen3.5 8k/1k peak from 1.3k to 6.4k tok/s/GPU and extend the curve out to 75 tok/s/user
- benchmark
- gpu
- inference
- +5
6 min read
AMD MI355X Kimi K2.5 Inference: 7.7x Throughput, Up To 15x Interactivity in 25 Days on vLLM
vLLM PR #35850 Fixed AITER MLA Dispatch on MI355X CDNA4, Unlocking Kimi K2.5 Inference Performance at TP=8, Shipped in vLLM 0.18
- benchmark
- gpu
- inference
- +5