Prompt Caching Pricing 2026: Anthropic, OpenAI, Google, and the Savings Math
Prompt caching pricing varies a lot across providers in 2026. The numbers, the savings math, and how to architect for cache hits.
8 min read
Archive page 618 of 1224
AI Voice Agent Insights & Guides
Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
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Agent Latency Budgets: How to Hit Sub-Second Decisions
Sub-second agent decisions need explicit budgets at every step. The 2026 latency-engineering patterns from real production deployments.
8 min read
AutoGen for Finance Research Analyst Teams: A Production Story
A New York hedge-fund team uses AutoGen 0.5 to coordinate research analyst agents on equities. The team-of-experts pattern in finance and what made it ship.
10 min read
Domain-Specific RAG: Medical, Legal, Financial Vocabularies
Domain vocabulary breaks generic embeddings. The 2026 patterns for medical, legal, and financial RAG that actually retrieve the right docs.
8 min read
Performance Profiling for AI Pipelines End-to-End
End-to-end performance profiling across LLM, retrieval, tool, and UI layers. The 2026 patterns for finding the real bottleneck in AI pipelines.
7 min read
Decision-Making in AI Agents: Bayesian, Utility, and Heuristic Approaches
How production AI agents actually decide in 2026 — from cheap heuristics to Bayesian inference to utility-based scoring, and where each one wins.
8 min read
Negative Prompts and Constraint Engineering for Safety
Telling the model what not to do is its own discipline. The 2026 patterns for negative prompts, constraint engineering, and safe behavior.
7 min read
Small Language Models That Beat GPT-4: Phi-4, Gemma-3, and SmolLM-3 Benchmarks
By 2026, sub-10B models beat 2024-era GPT-4 on most benchmarks. The Phi-4, Gemma-3, and SmolLM-3 family compared head-to-head.
8 min read
Enterprise CIO Guide: Vapi 2.0 — Workflow Builder, Squads, and Real Observability
Enterprise CIO Guide perspective on Vapi 2.0 added a visual workflow builder, multi-agent 'squads', and OpenTelemetry-grade observability — closing real gaps for production teams.
9 min read
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