I design and ship systems built on language models and AI agents, and I am currently building a harness for AI agents. I write about what actually works in practice, and what is just noise.https://sobolewski.pro/en-gbhttps://sobolewski.pro/en/blog/deepseek-deepinfer-open-source/https://sobolewski.pro/en/blog/deepseek-deepinfer-open-source/DeepSeek DeepInfer, the engine behind V4.1 Flash, is now Apache 2.0. Here's what's inside, what's still missing and who can actually run it.Tue, 20 Oct 2026 00:00:00 GMTAIopen-weightDeepSeekhttps://sobolewski.pro/en/blog/gemini-minecraft-ender-dragon/https://sobolewski.pro/en/blog/gemini-minecraft-ender-dragon/Gemini Minecraft agents: four Gemini 4 Argon agents went from a random spawn to killing the dragon in 27 hours, with no human help. Here is how they did it.Tue, 20 Oct 2026 00:00:00 GMTAIAI agentsGeminihttps://sobolewski.pro/en/blog/mercury-3-diffusion-llm/https://sobolewski.pro/en/blog/mercury-3-diffusion-llm/The Mercury 3 diffusion LLM from Inception: over 1,000 tokens/s, 1M context and $0.20 per 1M tokens. I explain how it works and how to try it.Tue, 20 Oct 2026 00:00:00 GMTAIAPIAI modelshttps://sobolewski.pro/en/blog/ai-cyberattack-cairn/https://sobolewski.pro/en/blog/ai-cyberattack-cairn/An AI cyberattack hit more than 100 companies, including Deere and SharkNinja: agents in Cairn worked almost alone, at about $50 per successful break-in.Mon, 19 Oct 2026 00:00:00 GMTAIAI agentsClaude Codehttps://sobolewski.pro/en/blog/minimax-m3-1-flash/https://sobolewski.pro/en/blog/minimax-m3-1-flash/MiniMax M3.1 Flash is the mysterious "Space Bunny" from OpenRouter. Let's check the price ($0.15 per 1M tokens), the benchmarks and how to try it today.Mon, 19 Oct 2026 00:00:00 GMTAIAI agentsAPIhttps://sobolewski.pro/en/blog/google-willow-magic-states/https://sobolewski.pro/en/blog/google-willow-magic-states/Google Willow showed magic state "cultivation" in practice: 40x fewer errors and 99.99% fidelity. I explain what magic states are and what this changes.Sun, 18 Oct 2026 00:00:00 GMTGooglequantum computinghttps://sobolewski.pro/en/blog/claude-code-review/https://sobolewski.pro/en/blog/claude-code-review/Claude Code Review is now generally available on Team and Enterprise: PR reviews in 6–10 minutes, Quick, Standard and Deep levels. How it works and how to turn it on.Sat, 17 Oct 2026 00:00:00 GMTAIClaudeAnthropicAI agentshttps://sobolewski.pro/en/blog/claude-quantum-circuits/https://sobolewski.pro/en/blog/claude-quantum-circuits/Quantum circuits designed by Claude Mythos 5 beat the best published designs in 7 of 8 tasks, including 17x fewer gates for elliptic curve point addition.Sat, 17 Oct 2026 00:00:00 GMTAIAnthropicClaudeMythoshttps://sobolewski.pro/en/blog/opencode-api-key-leak/https://sobolewski.pro/en/blog/opencode-api-key-leak/The OpenCode API key leak hit 1.4% of Console users and their OpenAI, Anthropic and Google keys. What we know about the attack and what to do with your keys now.Sat, 17 Oct 2026 00:00:00 GMTAIAI agentsAPIhttps://sobolewski.pro/en/blog/reflection-beam-open-weights/https://sobolewski.pro/en/blog/reflection-beam-open-weights/Reflection Beam open weights are out: 501B parameters, 23B active, Apache 2.0 license and a 1M-token context. What it can do and how to try it.Sat, 17 Oct 2026 00:00:00 GMTAIopen-weightAI agentshttps://sobolewski.pro/en/blog/ai-news-2026-10-16/https://sobolewski.pro/en/blog/ai-news-2026-10-16/AI news this week (Oct 10–16, 2026): Gemini 4 Argon, Claude Haiku 5.5 and fast mode, Muse Spark open weights, Krea 3, OpenCode 2.0 and the OpenAI bugging case.Fri, 16 Oct 2026 00:00:00 GMTAIWeekly roundupGoogleAnthropicOpenAIMetahttps://sobolewski.pro/en/blog/claude-code-tutorial/https://sobolewski.pro/en/blog/claude-code-tutorial/A Claude Code tutorial for beginners: one-command install, login, your first task in the terminal, the CLAUDE.md file and the commands worth knowing.Fri, 16 Oct 2026 00:00:00 GMTAIClaudeClaude CodeAI agentshttps://sobolewski.pro/en/blog/claude-fast-mode-opus-5-5/https://sobolewski.pro/en/blog/claude-fast-mode-opus-5-5/Claude fast mode for Opus 5.5 is out of research preview: up to 2.5x faster output, $8/$40 per million tokens, no waitlist. Here is how to turn it on.Fri, 16 Oct 2026 00:00:00 GMTAIClaudeAnthropichttps://sobolewski.pro/en/blog/claude-mythos-bank-of-america/https://sobolewski.pro/en/blog/claude-mythos-bank-of-america/Claude Mythos at Bank of America: so many flaws that the bank hired 1,000 contractors to patch them. What the CEO said, what it costs and what Mythos is.Fri, 16 Oct 2026 00:00:00 GMTAIAnthropicClaudeMythoshttps://sobolewski.pro/en/blog/deepseek-free-opencode/https://sobolewski.pro/en/blog/deepseek-free-opencode/DeepSeek free in OpenCode: V4.1 Flash with a 200K-token context no longer uses credits. What it can do, where the catches are and how to turn it on.Fri, 16 Oct 2026 00:00:00 GMTAIAI agentsopen-weighthttps://sobolewski.pro/en/blog/krea-3-whats-new/https://sobolewski.pro/en/blog/krea-3-whats-new/What's new in Krea 3: 2K photo edits in under 8 s for $0.06, up to 6 reference images and LoRA training. How it compares to Nano Banana Pro and how to try it.Fri, 16 Oct 2026 00:00:00 GMTAIimage generationkreahttps://sobolewski.pro/en/blog/ai-act-enforcement-openai-anthropic/https://sobolewski.pro/en/blog/ai-act-enforcement-openai-anthropic/AI Act enforcement has started: the EU AI Office sent OpenAI and Anthropic requests for information after agent incidents. What it means for companies using AI.Thu, 15 Oct 2026 00:00:00 GMTAIAI Actregulationhttps://sobolewski.pro/en/blog/gpt-4o-api-deprecation/https://sobolewski.pro/en/blog/gpt-4o-api-deprecation/GPT-4o API deprecation: on January 14, 2027 OpenAI shuts down GPT-4o, GPT-4o mini and GPT-4.1. Check if it affects you and how to move to the new model.Thu, 15 Oct 2026 00:00:00 GMTAIOpenAIAPIhttps://sobolewski.pro/en/blog/muse-spark-open-business/https://sobolewski.pro/en/blog/muse-spark-open-business/Muse Spark Open for business: Meta released the weights of its 816B model. What the license allows, what hardware you need and what the API costs. No hype.Thu, 15 Oct 2026 00:00:00 GMTAImetaopen-weight