Bump install.sh / install.ps1 pins to unsloth>=2026.9.5

[danielhanchen]

unsloth 2026.9.5 and unsloth_zoo 2026.9.4 are both on PyPI now, so move the installer floors up to match, same as #5716.

What changed

install.sh

• _unsloth_release_install_spec default: unsloth>=2026.9.4 -> unsloth>=2026.9.5
• 5 unsloth-zoo>=2026.9.3 call sites -> unsloth-zoo>=2026.9.4

install.ps1

• $_unslothReleaseInstallSpec default: unsloth>=2026.9.4 -> unsloth>=2026.9.5
• 6 unsloth-zoo>=2026.9.3 call sites -> unsloth-zoo>=2026.9.4

No other files. pyproject.toml already carries unsloth_zoo>=2026.9.4 on all three lines, which is the current PyPI release, so it is left alone.

Why 2026.9.5 matters for the floor

2026.9.5 is the first release that carries the Windows on ARM work end to end, so a fresh irm https://unsloth.ai/install.ps1 | iex on an ARM64 box now resolves a wheel set that actually exists:

• triton-windows>=3.8.0.post28 under the win32 + ARM64 marker
• hf_transfer gated off ARM64 where it has no wheel

Checks

• bash -n install.sh clean
• PowerShell parser over install.ps1 clean, 0 errors
• No unsloth>=2026.9.4 or unsloth-zoo>=2026.9.3 strings left in either script
• Diff is 13 lines, pins only, no logic touched

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-16T16:02:37.296741Z	f3b1e26	PR opened

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