Voice AI Concurrency at Scale: CallSphere vs Vapi 100+ Calls
How to scale a voice AI platform to 100+ concurrent calls. K8s HPA, OpenAI Realtime pooling, Twilio media streams. CallSphere vs Vapi capacity tradeoffs.
15 min read
Guides & News
Guides & News archive page 25 of 68
AI Guides, Tutorials & News
Step-by-step guides, technical tutorials, and use-case playbooks for building AI voice and chat agents — plus the latest AI news, model releases, funding, and policy developments.
From the blog
Latest articles
Auto PII Redaction in Call Logs: CallSphere vs Vapi DIY
Voice transcripts leak SSNs, DOBs, and card numbers. See why automatic PII redaction matters and how CallSphere bakes it in vs. Vapi DIY pipelines.
11 min read
Cold-Start Voice AI Performance: CallSphere vs Vapi Benchmarks
Detailed cold-start benchmarks for voice AI: WebSocket setup, model warmup, first-token latency. Compare CallSphere on K8s vs Vapi managed pipeline.
13 min read
ElevenLabs Sarah Voice in CallSphere vs Configuring on Vapi
CallSphere ships the ElevenLabs Sarah voice tuned for sales conversations. On Vapi you bring your own ElevenLabs API key and tune everything yourself.
14 min read
Support Tickets Arrive Without Triage: Use Chat and Voice Agents to Clean the Queue
Unstructured support intake creates backlogs and bad routing. Learn how AI chat and voice agents triage issues before they hit the service desk.
11 min read
Meta AI Research: 5 Papers From April 2026 Worth Reading
Five Meta AI research papers from April 2026 that builders should know about — from JEPA-2 to MoE routing tricks. Practical context for teams in Chicago, IL.
8 min read
xAI Colossus 2: 1.2M GPUs and the New Compute Frontier
xAI announced Colossus 2, a 1.2M-GPU datacenter going live in 2026 — the largest single-site AI training cluster on Earth. Lens: fintech. A 2026 builder briefing.
9 min read
Gemini Robotics-ER 1.5: Embodied Reasoning Goes Multimodal
Gemini Robotics-ER 1.5 brings embodied reasoning to consumer robotics platforms — here is what changed and who's using it. Practical context for teams in New York.
7 min read
Gemini 3 Flash: Fast, Cheap, and Built for Agent Loops
Gemini 3 Flash launches at $0.10/$0.40 per million tokens with sub-400ms first-token latency — the new default for high-volume agents. Practical context for teams in Oregon.
9 min read