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Claude Opus 5.5 is Anthropic's efficiency turn: the same frontier coding quality as Opus 5, 20% cheaper, and finishing tasks in far fewer tokens and turns.

Claude Opus 5.5 is the first Opus to get cheaper: $4 and $20 per million tokens, plus cache reads at a fifth of the old rate. Here is what a real run costs.

A plain-English guide to GPT-6 Luna, OpenAI's cheapest GPT-6 model: what it is, what it's good at, how to access it in ChatGPT and the API, and where it falls short.

OpenAI's GPT-6 Sol landed on 23 September 2026 as the balanced, half-price workhorse of the GPT-6 family. Here is what it actually is, the real benchmark story, the $2/$10 pricing, and who should use it.

A full breakdown of GPT-6 Luna pricing: the $0.10/$0.50 standard API tier, the cheapest model in the GPT-6 family, Batch and Fast mode, the long-context surcharge, and which ChatGPT plans include it.

A full breakdown of GPT-6 Sol pricing: the $2/$10 standard API tier, the 50% cut versus GPT-5.6 Sol, Batch and Fast mode, the long-context surcharge, and which ChatGPT plans include it.

A hands-on Chatbase vs SiteGPT comparison: real monthly pricing, how each bot gets billed, what it can train on, and which support job each one actually fits.

A hands-on Chatbase vs Chatling comparison: real 2026 pricing, the credit-meter gotchas, agent caps, knowledge base limits, and which one fits your team.

A hands-on Gradient Labs vs Lorikeet comparison: pricing, how each agent is built, who each fits, and where a lighter helpdesk teammate makes more sense.