This week in AI updates: Anthropic acquires Bun, GPT-5.1-Codex-Max added to API, and more (December 5, 2025)

Anthropic acquires Bun

Bun is a JavaScript, TypeScript, and JSX toolkit, and Anthropic plans to incorporate it into Claude Code to improve performance and stability and enable new capabilities.

“Bun is redefining speed and performance for modern software engineering and development. Founded by Jarred Sumner in 2021, Bun is dramatically faster than the leading competition. As an all-in-one toolkit—combining runtime, package manager, bundler, and test runner—it’s become essential infrastructure for AI-led software engineering, helping developers build and test applications at unprecedented velocity,” Anthropic wrote in a post.

GPT-5.1-Codex-Max now available in OpenAI API

GPT-5.1-Codex-Max is the company’s latest frontier agentic coding model, and it is faster, more intelligent, and uses fewer tokens than the base GPT-5.1-Codex.

OpenAI also announced that developers can now delegate tasks from Linear to Codex. They can assign or mention Codex in an issue to trigger it, and then as Codex works through the task, it posts updates back to Linear.

Google adds Data Commons extension to Gemini CLI

Google is adding a Data Commons extension to the Gemini CLI to make it easier for developers to access and interact with publicly available data.

Data Commons is a large library of public data from around the world, gathered from sources like the United Nations, the World Bank, and a number of government agencies.

The new extension can be used to ask questions like “What are some interesting statistics about India?” or “Analyze the impact of education expenditure on GDP per capita in Scandinavian countries” directly in the CLI.

Amazon releases Nova Forge, Nova Act, and new Nova models

Nova Forge allows developers to build their own frontier models using Nova models. Users can combine their own datasets with Amazon Nova-curated training data, and then host their models on AWS.

Nova Act is a new service that helps developers build, deploy, and manage fleets of agents for UI workflows.

Finally, Nova 2 Lite is a fast and cost-effective reasoning model that supports extended thinking, and Nova 2 Sonic is a speech-to-speech model for building voice interactivity.

Amazon adds 18 new open weight models to Bedrock

The new models include ones from Google, Mistral, NVIDIA, OpenAI, Moonshot AI, MiniMax AI, and Qwen. These include the four newest models from Mistral, which are only available on Bedrock: Mistral Large 3, Ministral 3 3B, Ministral 3 8B, and Ministral 3 14B.

“With this launch, Amazon Bedrock now provides nearly 100 serverless models, offering a broad and deep range of models from leading AI companies, so customers can choose the precise capabilities that best serve their unique needs,” the company wrote in a blog post.

Parasoft releases latest version of C/C++test with agentic AI workflows

First previewed at embedded world North America last month, the updates include agentic AI workflows, static analysis for CUDA C/C++, and improved support for GoogleTest.

Parasoft’s MCP server allows AI agents to be connected to C/C++test to automatically fix violations, optimize rule sets, and generate documentation.

“This is what AI developers actually want—one that acts as a true partner,” said Igor Kirilenko, chief product officer at Parasoft. “By automating the heavy lifting, it frees up your experts to focus on more complex challenges, turning quality and compliance from a burden into their greatest advantage.”

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