--- title: "Umesh Malik (@umeshmalik) | Hashnode" description: "Umesh Malik (@umeshmalik) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@umeshmalik" --- @umeshmalik # Umesh Malik @umeshmalik · Joined October 2022 [Website](https://umesh-malik.com/) ### [Anthropic Code Review for Claude Code: Multi-Agent PR Reviews, Pricing, Setup, and Limits](https://umesh-malik.hashnode.dev/anthropic-code-review-for-claude-code-multi-agent-pr-reviews-pricing-setup-and-limits?utm_source=hashnode&utm_medium=feed) Anthropic launched Code Review for Claude Code on March 9, 2026, and the short answer is simple: this is a managed pull-request reviewer that runs multiple Claude agents in parallel, verifies their findings, and posts ranked review comments back into... 7 min read · [umesh-malik.hashnode.dev](https://umesh-malik.hashnode.dev/anthropic-code-review-for-claude-code-multi-agent-pr-reviews-pricing-setup-and-limits?utm_source=hashnode&utm_medium=feed) [Mar 10](https://hashnode.com/posts/anthropic-code-review-for-claude-code-multi-agent-pr-reviews-pricing-setup-and-limits/69afc72420fca12cd4c7485c) ### [Agentic AI Is Changing the Security Model for Enterprise Systems: What CISOs Need to Fix Now](https://umesh-malik.hashnode.dev/agentic-ai-is-changing-the-security-model-for-enterprise-systems-what-cisos-need-to-fix-now?utm_source=hashnode&utm_medium=feed) On March 7, 2026, Heather Wishart-Smith wrote in Forbes that agentic AI is changing the security model for enterprise systems. That framing is correct, but it still sounds smaller than the actual shift. Traditional enterprise security assumed a simpl... 8 min read · [umesh-malik.hashnode.dev](https://umesh-malik.hashnode.dev/agentic-ai-is-changing-the-security-model-for-enterprise-systems-what-cisos-need-to-fix-now?utm_source=hashnode&utm_medium=feed) [Mar 9](https://hashnode.com/posts/agentic-ai-is-changing-the-security-model-for-enterprise-systems-what-cisos-need-to-fix-now/69ae62e42ea5f8ed8fd3b166) ### [OpenAI GPT-5.4 Complete Guide: Benchmarks, Use Cases, Pricing, API, and GPT-5.4 Pro Comparison](https://umesh-malik.hashnode.dev/openai-gpt-54-complete-guide-benchmarks-use-cases-pricing-api-and-gpt-54-pro-comparison?utm_source=hashnode&utm_medium=feed) OpenAI released GPT-5.4 on March 5, 2026, and this is the first GPT release in a while that feels less like a narrow benchmark bump and more like a model-line reset. The reason is simple: GPT-5.4 is the first mainline OpenAI reasoning model that comb... 13 min read · [umesh-malik.hashnode.dev](https://umesh-malik.hashnode.dev/openai-gpt-54-complete-guide-benchmarks-use-cases-pricing-api-and-gpt-54-pro-comparison?utm_source=hashnode&utm_medium=feed) [Mar 6](https://hashnode.com/posts/openai-gpt-54-complete-guide-benchmarks-use-cases-pricing-api-and-gpt-54-pro-comparison/69aaafde0510922b30b9d034) ### [OpenAI GPT-5.3 Instant: Fewer Refusals, Better Web Answers, and a Smoother ChatGPT](https://umesh-malik.hashnode.dev/openai-gpt-53-instant-fewer-refusals-better-web-answers-and-a-smoother-chatgpt?utm_source=hashnode&utm_medium=feed) OpenAI just shipped the most user-visible model update of 2026 — and it is not about benchmarks or parameter counts. GPT-5.3 Instant is about fixing the things that make ChatGPT frustrating to use every day: unnecessary refusals, preachy disclaimers,... 11 min read · [umesh-malik.hashnode.dev](https://umesh-malik.hashnode.dev/openai-gpt-53-instant-fewer-refusals-better-web-answers-and-a-smoother-chatgpt?utm_source=hashnode&utm_medium=feed) [Mar 3](https://hashnode.com/posts/openai-gpt-53-instant-fewer-refusals-better-web-answers-and-a-smoother-chatgpt/69a750dcb4bbf3d76afa14c2) ### [DeepSeek V4 Is About to Test America’s AI Lead: What We Know Before Launch](https://umesh-malik.hashnode.dev/deepseek-v4-is-about-to-test-americas-ai-lead-what-we-know-before-launch?utm_source=hashnode&utm_medium=feed) If DeepSeek ships V4 in the first week of March 2026, this won’t be just another model update. It will be a geopolitical product launch disguised as a technical release. The short answer is simple: DeepSeek appears to be using V4 to pressure two fron... 12 min read · [umesh-malik.hashnode.dev](https://umesh-malik.hashnode.dev/deepseek-v4-is-about-to-test-americas-ai-lead-what-we-know-before-launch?utm_source=hashnode&utm_medium=feed) [Mar 1](https://hashnode.com/posts/deepseek-v4-is-about-to-test-americas-ai-lead-what-we-know-before-launch/69a4727f526b1093f21e9e8d)