Prompt caching is the cheapest cost lever most LLM teams have not fully exploited: providers charge a fraction of the normal input rate for any prompt prefix your workload reuses, and the discounts are large enough to reorder architecture decisions. DeepSeek bills disk-cache hits at $0.014 per million tokens against …
Kubernetes GPU Scheduling with Node Pools: The Setup
Kubernetes GPU scheduling with node pools comes down to one contract: a vendor device plugin registers the accelerators with the kubelet, the node advertises a schedulable extended resource such as nvidia.com/gpu, and your containers consume it through resource limits. The scheduler then treats a GPU like any other allocatable resource. …
Cut Inference Spend With Model Routing: Practical Guide
Model routing is the highest-leverage cost decision in an LLM stack. Most production traffic does not need a frontier model, and a router that sends simple queries to a cheap endpoint while escalating the hard ones keeps quality where it matters and cuts the bill everywhere else. The evidence is …
LLM Evaluation Pipelines in CI: The Engineer Setup
LLM evaluation pipelines in CI turn model and prompt quality from a manual review into a build gate: a versioned test set, a runner that executes it, and a threshold that fails the pipeline when scores drop. For most engineering teams the practical stack is two open-source tools. promptfoo evaluates …
AWS Console in Brazil: What Engineers Need to Know
Brazilian cloud engineers interact with the AWS Management Console daily, but the experience differs meaningfully from what counterparts in us-east-1 or eu
Choosing Embedding Models for Semantic Search in 2026
Choosing embedding models for semantic search in production comes down to five axes: retrieval quality on a benchmark that matches your languages, context length, dimension and its index cost, Matryoshka (MRL) support for dimension flexibility, and total operating cost across API calls or self-hosted GPUs. Managed APIs such as Cohere …
KV Cache and Batching: Raising LLM Serving Throughput
LLM serving throughput is decided by two memory-side mechanics before any GPU upgrade matters: how the engine stores the key-value (KV) cache and how it refills batches during decoding. Profiling published with the vLLM paper found that in systems that pre-allocate contiguous cache for each request, only 20.4% to 38.2% …
Multi-Region Failover for AI APIs: The Engineer Setup
Multi-region failover for AI APIs is no longer a bespoke project: the three hyperscalers now ship managed routing for model inference, and the engineering work has moved to configuration, policy, and verification. Amazon Bedrock’s global cross-Region inference profiles price approximately 10% below standard regional inference while sending requests to regions …
Serverless Inference Cold Starts: An Engineer’s Guide
Serverless inference cold starts are two stacked problems, not one. The platform provisions compute, attaches storage and pulls your container image; only then does the inference engine load model weights into GPU memory, compile execution graphs and accept traffic. On GPU platforms the second stage dominates: as RunPod documents from …
Fine-Tuning vs Prompt Engineering: Cost Trade-offs
Prompt engineering wins on cost for most production workloads, because inference dominates lifetime spend and prompt-side levers — caching, compression, model routing — cut that bill without any training run. Fine-tuning pays back only in a narrow band: high-volume, stable tasks where shrinking the prompt removes more token cost than …
LLM Observability in Production: The Engineer Setup
Production LLM observability stands on two legs: distributed tracing that records every model call, and evaluation that scores whether those calls were any good. The OpenTelemetry GenAI semantic conventions now give both legs a shared foundation, because they define a common span vocabulary for generative AI operations that any SDK …
Cloud AI Cost Optimization: The Engineer’s Playbook
Cloud AI cost optimization is an architecture and purchasing problem, not a negotiation exercise. Four levers move the bill: model and inference selection, discount instruments such as commitments and spot capacity, token and workflow controls, and the elimination of idle GPU hours. Applied together, they attack training and inference spend …