Bring-Your-Own-Model in Antigravity: Claude, GPT-5.5, Gemini 3
Antigravity supports Claude Opus 4.7, GPT-5.5, and Gemini 3 Pro out of the box — here is how to configure each. Practical context for teams in Ohio.
6 min read
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AI Voice Agent Insights & Guides
Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
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From the blog
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AgentKit 1.0 for Real Estate in Seattle: Brokerage Tech Stacks
Seattle real estate brokerages are building agent-powered tech stacks on OpenAI AgentKit 1.0 — what is working for buyer search, listing prep, and ops.
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Public AI Voice Case Studies in Property Management 2026: EliseAI's $14M Payroll Save
EliseAI saved multifamily operators $14M in payroll, recovered $4.13B in delinquent rent, and saved 10.8M leasing hours. Plus the 60% response-time drop other PM teams reported in 2026.
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Toronto Startups Replace Pair Programming with Claude Code 2.1
A practical engineering deep dive into Claude Code 2.1 Toronto, covering architecture, tradeoffs, and what production teams need to know about Canadian startups.
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Amazon Rufus Shopping Agent 2026: Conversational Commerce Scale
Amazon Rufus crossed 250M monthly users in 2026 across the consumer base. Here's the product, the conversion impact on Amazon proper. The 30-day picture for buyers and operators.
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CoreWeave aftermarket performance — April 2026 take
By April 2026 CoreWeave shares are trading roughly 60% above its March 2024 IPO price, with Q1 2026 earnings re-rating the AI infrastructure cohort.
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AWS Bedrock + Transcribe + Polly Stitched vs Realtime: Real Cost
Bedrock Claude + Transcribe streaming + Polly Neural runs $0.06–$0.10 per minute on paper. The honest math reveals where the AWS-native stack beats and where it loses to OpenAI Realtime.
11 min read
Enterprise CIO Guide: Retell AI Knowledge Base — RAG Goes Native in Voice
Enterprise CIO Guide perspective on Retell shipped first-class knowledge bases for voice agents, removing one of the last reasons to roll your own RAG layer.
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South Africa Calling Platform with POPIA Compliance
Deploy a compliant calling platform in South Africa with POPIA data protection, ICASA regulations, and load-shedding resilience strategies for reliable operations.
11 min read
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