AI & MLIntermediate
Azure OpenAI and Microsoft Foundry for .NET Developers
Use Azure OpenAI in Microsoft Foundry (formerly Azure AI Foundry) from .NET: deployments, keyless auth, guardrails, quotas, PTUs, Agent Service and cost.
OpenAI
19 articles about OpenAI: in-depth .NET and AI guides, senior interview questions and AI news on DotNet AI Hub.
Technologies 3
AI & MLIntermediate
Multimodal AI in .NET: Vision, Audio and Speech
Build multimodal .NET apps that understand images, documents, speech and audio, and generate images and voice, with Microsoft.Extensions.AI and Azure AI.
AI & MLIntermediate
Using the Official OpenAI .NET Library for C#
A practical guide to the OpenAI .NET SDK: ChatClient, streaming, tool calls, structured outputs, the Responses API, embeddings, images, audio and retries.
AI News 16
OpenAI Confidentially Files for an IPO, One Week After Anthropic
OpenAI confidentially filed for an IPO on June 8, 2026, a week after Anthropic, at a last valuation of $852B. What a listing could mean for developers.
Microsoft and OpenAI Amend Their Partnership, Ending Azure Exclusivity
Microsoft and OpenAI amended their partnership on April 27, 2026: OpenAI can sell on any cloud, Azure ships first and Microsoft keeps IP rights through 2032.
OpenAI Releases GPT-5.5, Its Strongest Agentic Coding Model Yet
OpenAI released GPT-5.5 on April 23, 2026, with top agentic coding scores and GPT-5.4-level latency, then brought it to the API at $5/$30 per million tokens.
OpenAI Closes a $122 Billion Funding Round at an $852 Billion Valuation
OpenAI raised $122 billion at an $852 billion valuation from Amazon, Nvidia, SoftBank and retail investors. What the record round means for developers.
OpenAI Launches GPT-5.4 with Native Computer Use and 1M-Token Context
OpenAI released GPT-5.4 on March 5, 2026, with native computer use, tool search and a 1M-token API context, priced at $2.50 and $15 per million tokens.
Xcode 26.3 Brings Agentic Coding With Claude Agent and OpenAI Codex
Apple announced Xcode 26.3 on February 3, 2026, with built-in agentic coding through Anthropic's Claude Agent and OpenAI's Codex, plus MCP support.
OpenAI Launches a Standalone Codex App for Managing Coding Agents
OpenAI launched a standalone Codex app for Mac on February 2, 2026, built to help developers run and manage several AI coding agents at once. What changed.
MCP Apps Launches as the First Official MCP Extension for Interactive UI
MCP Apps, launched on January 26, 2026 as the first official MCP extension, lets tools return interactive UIs that render in Claude, ChatGPT, VS Code and goose.
OpenAI Signs $10 Billion-Plus Deal for 750 MW of Cerebras Compute
OpenAI signed a multiyear deal on January 14, 2026 for 750 MW of Cerebras computing power, reportedly worth over $10 billion, to speed up AI inference.
Agentic AI Foundation Launches With MCP, goose and AGENTS.md
On December 9, 2025, the Linux Foundation formed the Agentic AI Foundation, with Anthropic's MCP, Block's goose and OpenAI's AGENTS.md as founding projects.
OpenAI Launches GPT-5, a Unified Model That Decides When to Think
OpenAI released GPT-5 on August 7, 2025, merging fast answers and deep reasoning in one system, with new API controls, lower prices and fewer hallucinations.
OpenAI Releases gpt-oss-120b and gpt-oss-20b, Its First Open-Weight Models Since GPT-2
OpenAI released gpt-oss-120b and gpt-oss-20b in August 2025, its first open-weight language models since GPT-2, under Apache 2.0 for reasoning and tool use.
OpenAI Acquires Jony Ive's io in a $6.5 Billion All-Stock Deal
OpenAI agreed to buy io, the AI device startup founded by Jony Ive, for about $6.5 billion in stock. What its hardware push could mean for developers.
OpenAI Releases o3 and o4-mini, Reasoning Models That Use Tools
OpenAI's o3 and o4-mini, released April 16, 2025, reason with tools and images, posted strong coding and math results and reached developers through the API.
OpenAI Launches GPT-4.1 in the API with a 1M-Token Context Window
OpenAI released GPT-4.1, mini and nano in April 2025: API-first models with a 1M-token context, stronger coding and more literal instruction following.
OpenAI Adopts the Model Context Protocol, Starting With the Agents SDK
On March 26, 2025, OpenAI said it would support Anthropic's Model Context Protocol across its products, starting with the Agents SDK. What it means for devs.