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Articles, reviews and hands-on guides on AI.
Published 2026-09-285 min read
Anthropic releases Claude Opus 5.5: what changes in pricing, the API and agentic work
Claude Opus 5.5 launched Sep 22, 2026: $4/$20 per 1M tokens, cache reads 60% cheaper, 30%+ faster output and 4 breaking API changes. What it means for you.
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Published 2026-09-2811 min read
Prompt engineering from scratch: a 4-week plan for Claude Opus 5.5, ChatGPT and Gemini
Prompt engineering from scratch in 4 weeks: prompt structure, few-shot, long documents, agents and prompt injection defense, with exercises and tables.
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