Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
From the blog
Reflection turns a one-shot LLM into an agent that critiques and rewrites itself. We cover Reflexion-style loops, separate-critic vs same-agent reflection, and how CallSphere uses critics on agent transcripts before they hit Postgres.
Skip Redis and Kafka for moderate-scale AI realtime — Postgres LISTEN/NOTIFY gives you pub/sub with ACID semantics. Build an agent event bus, watch for the global commit lock, and know when to graduate.
PolyAI raised Vodafone NPS from 14 to 64. Web surveys hit 2-5% response, AI voice surveys hit 25-40%. Here is the outbound CSAT/NPS build that actually finishes the conversation.
Mistral OCR, LandingAI, and docAnalyzer push agentic document extraction past 95% accuracy. Here is how 2026 chat agents accept uploads, OCR, and answer with cited spans inline.
LLM TTFT is the single biggest latency line item, often 70% of total. We show how to cut it with prompt caching, smaller models, region pinning, and Realtime APIs that fuse STT + LLM.
<Gather> now picks Google V2, Deepgram Nova-2, or Twilio's own model per language. We benchmark the four modes, show hint tuning, and explain when to ditch <Gather> for <Stream>.
Akamai's 2026 sensor.js inspects WebRTC stack alongside GPU and audio context to score every visitor. For AI voice apps, the trick is using the same signals against bots without nuking real users.
The SAFE Act draws a hard line: quoting rates or recommending a loan product is licensed-MLO activity, period. Here is what an AI voice agent can and cannot say at a mortgage shop in 2026.
Voice latency budgets live or die under 800 ms. We show how OpenAI's Stored Completions + Distillation pipeline turns GPT-4o traces into a fine-tuned gpt-4o-mini that hits the same task accuracy at 1/8 the cost and 250 ms lower TTFT.
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