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Git 2.56, Rust 1.99 and Firefox 157 ship, Python 3.10 reaches end of life, and Gemini 4 Argon goes to cyber defenders first

It was a heavy release week for the tools developers touch every day: Git, Rust, Firefox and npm all shipped changes worth reading before you upgrade. On the AI side, the newest frontier models went to a small group of users first, and OpenAI's cheaper GPT-6.1 Sol came close to the flagship it replaced.

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  1. Git 2.56.0 ships faster merge-base and smaller repacks

    One Linux kernel merge-base walk drops from 167,441 steps to 3,887, and one test repository's pack shrinks by 71%. It shipped September 28.

  2. Rust 1.99 stabilizes C-variadic function definitions

    Stable Rust can now define printf-style functions. The release also moves to LLVM 23 and makes no_mangle on generics an error.

  3. Python 3.10 hits end of life as five releases fix 8 CVEs

    Python 3.10.22 is the last 3.10 release. Versions 3.11 to 3.14 shipped fixes for up to eight CVEs, so check which Python your images still run.

  4. Firefox 157 ships a redesign and hardware AV1 for WebRTC

    Out September 29, it adds hardware AV1 decoding for WebRTC calls, a CSS at-rule() test and Mozilla's biggest visual refresh in years.

  5. npm trusted publishing can now move dist-tags over OIDC

    Short-lived OIDC tokens can now add, move and remove tags such as latest. It is off by default and needs npm 11.21.0.

  6. Android developer verification starts in four countries

    Since September 30, apps in Brazil, Indonesia, Singapore and Thailand need a Google-verified developer to install from seven app stores.

  7. Gemini 4 Argon opens to cyber defenders before developers

    It scores 77.9% on DeepSWE v1.1 and can write 1M tokens per answer, but only Google's Fairwind Program members can use it so far.

  8. GPT-6.1 Sol nearly matches Astra at one-fifth the cost

    OpenAI's new model cuts the factual-error rate to 7.7% and costs one-fifth as much as the shelved GPT-6 Astra.

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