Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
From the blog
Small language models (Phi-4-mini, Gemma 3, Llama 3.3) for personalization and recommendations — a May 2026 comparison grounded in current model prices, benchmark...
Multi-LLM router (LiteLLM / Portkey / OpenRouter) for personalization and recommendations — a May 2026 comparison grounded in current model prices, benchmarks, an...
Self-hosted on-prem stack for personalization and recommendations — a May 2026 comparison grounded in current model prices, benchmarks, and production patterns.
Lowest-latency LLM stack for personalization and recommendations — a May 2026 comparison grounded in current model prices, benchmarks, and production patterns.
Cheapest LLM stack for personalization and recommendations — a May 2026 comparison grounded in current model prices, benchmarks, and production patterns.
Open-source vs closed-source LLMs for personalization and recommendations — a May 2026 comparison grounded in current model prices, benchmarks, and production pat...
DeepSeek V4 vs Llama 4 vs Qwen 3.5 vs Mistral Large 3 for personalization and recommendations — a May 2026 comparison grounded in current model prices, benchmarks...
GPT-5.5 vs Claude Opus 4.7 vs Gemini 3.1 Pro for personalization and recommendations — a May 2026 comparison grounded in current model prices, benchmarks, and pro...
Fine-tune vs prompt vs RAG for intent classification (cheap, fast) — a May 2026 comparison grounded in current model prices, benchmarks, and production patterns.
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