Anthropic revenue run-rate — April 2026 read — April 2026 update
Anthropic's April 2026 revenue run-rate cleared $5B annualized, with Claude Code and the new Skills/MCP-anchored agent platform driving the bulk of growth.
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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OpenAI revenue run-rate — April 2026 read — April 2026 update
OpenAI's April 2026 reported revenue run-rate cleared $13B annualized, on continued ChatGPT growth, agentic Operator monetization, and enterprise API expansion.
6 min read
Voice AI market April 2026 roundup — CallSphere, Vapi, Retell
April 2026's voice AI market is consolidating around five names — CallSphere, Vapi, Retell, Hippocratic AI, and Sierra — each defining a distinct vertical posture.
6 min read
Bangalore Healthcare AI Agents: Apollo, Manipal, Narayana 2026
Apollo, Manipal, and Narayana scaled AI agents across Bangalore in 2026. Here's the deployments across radiology, intake, and follow-up, the costs.
8 min read
Brex vs Ramp AI Agents 2026: The Spend Management Showdown
Brex and Ramp both shipped autonomous AI agents in 2026 — for receipts, approvals, and vendor management. Here's the head-to-head comparison, the bundled pricing.
11 min read
LexisNexis Lexis+ AI 2026: Litigation Drafting and Pricing
Lexis+ AI shipped major 2026 updates with litigation drafting and Brief Analyzer. Here's what's new, what it costs per seat. The 30-day picture for buyers and operators.
9 min read
Retail AI Agents 2026: Walmart, Target, Best Buy Rollouts
Walmart, Target, and Best Buy scaled customer-facing AI agents in 2026 across web and mobile channels. We profile the deployments, the vendors.
10 min read
Catching Performance Regressions in AI Agent CI Pipelines
Standard benchmarks miss agent regressions because they grade only final outputs. Trajectory-aware evals in CI catch the 20–40% of regressions that single-turn scoring hides.
11 min read
Build a CallSphere-Style Outbound Voice Campaign Tool
Replace expensive outbound SDR tooling with a self-hosted dialer that runs OpenAI Realtime agents at 100 concurrent calls. Full architecture and code.
13 min read
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