AI illustration: Open-source the entire X codebase
XAI
Partial

X open source algorithm: Elon promised the whole codebase

Elon Musk said X would open-source its entire codebase by Jan 31, 2026. It only partly happened.

“hopefully by next month, we should be able to open source literally all of the @X codebase. Nothing left out at all.”
— Elon Musk · Dec 5, 2025 · @elonmusk on X ↗
See his original post on XLoads Elon's actual tweet, right here.
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What actually happened

Musk promised (Dec 2025) to open-source 'literally all of the @X codebase. Nothing left out at all' by roughly end of January 2026. X open-sourced its recommendation algorithm (xai-org/x-algorithm) on January 20, 2026. Fetched Sep 30 2026: GitHub README is still titled 'X For You Feed Algorithm'; latest notable update is still Sep 18 Under the Hood legal-compliance labels. 'What's not in this repo' still excludes Grox prompts, some botmaker rules, and the rest of the X website/app. Status stays partial. GitHub xai-org/x-algorithm README fetched Sep 30 2026 — still For You ranking stack, not the entire X codebase ↗

The Progression

Dec 5, 2025
The promise: “hopefully by next month, we should be able to open source literally all of the @X codebase. Nothing left out at all.” · @elonmusk on X ↗
Jan 20, 2026
Partial — on time. Musk promised (Dec 2025) to open-source 'literally all of the @X codebase. Nothing left out at all' by roughly end of January 2026. X open-sourced its recommendation algorithm (xai-org/x-algorithm) on January 20, 2026. Fetched Sep 30 2026: GitHub README is still titled 'X For You Feed Algorithm'; latest notable update is still Sep 18 Under the Hood legal-compliance labels. 'What's not in this repo' still excludes Grox prompts, some botmaker rules, and the rest of the X website/app. Status stays partial. GitHub xai-org/x-algorithm README fetched Sep 30 2026 — still For You ranking stack, not the entire X codebase ↗
Today · Sep 30, 2026
Status: Partial · on time. Sort of happened.

X open-sourced only its recommendation algorithm in March 2026 — after the Jan target and far short of 'literally all of the @X codebase, nothing left out.'

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LAST CHECKED 2026-09-30

X’s record

Delivered
4
80% of resolved claims delivered.
Missed
1
Deadline passed, still no-show.
Still open
1
On the clock now. All 6 X claims →

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“Grok 5 will be out before the end of this year and it will be crushingly good.”
goalposts: 2025 → 2026 · moved 1×
called AUG 2025273 days past due

Discussion

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← Grok 4.20 in ~3 weeks, Grok 5 in a few months Security-test and open-source all of X Chat →
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