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September 26, 2026
In open PR #35 from Sep 25, the ASM version of ttfx sped up the `print` effect from 267 to 16 ms: 16.7× on Zen 5. Opus 5.5 converted the engine from Rust to x86-64 assembly in a single pass. The `asm-zen5` branch has 88 commits.
Source
story · 3 stories — how events unfolded
Insight
Long agent projects will cost less: Claude Opus 5.5 is up to 40% cheaper than Opus 5September 22
Release
Claude Opus 5.5 work got cheaper: Anthropic promises 40% savingsSeptember 22
who it's about
about the same entities
Release
GitHub Copilot will surface configuration errors: validator shows the JSON pathSeptember 26
Release
Claude Code will not allow a new model without approval: exact mode in v2.1.283September 26
Release
Review delays will be visible by stage: GitHub adds them to the Usage metrics APISeptember 26
Insight
Chat is not always enough for GitHub Copilot: the app includes canvasesSeptember 25
Release
Copilot brings chat, code and agents into one window: Microsoft combines 3 modesSeptember 25
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