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How we build, by the numbers.

We build software with AI agents, every day. These are the receipts for the last 12 months: how much we commit, what we write, how much of it Claude wrote alongside us, and roughly how many tokens it takes.

Every number is rounded on purpose: counts to two significant figures, percentages to the nearest 5. They're estimates, not an accounting. Data through October 21, 2026.

Commits per month #

About 65,000 commits over 12 months, about 5,400 a month on average.

Commits per month, across every repository we pushed to. Bots, merges and forks are left out.
Show the numbers
MonthCommits
Nov 2025about 2,700
Dec 2025about 2,600
Jan 2026about 2,400
Feb 2026about 3,500
Mar 2026about 6,200
Apr 2026about 9,300
May 2026about 6,500
Jun 2026about 6,600
Jul 2026about 4,400
Aug 2026about 6,100
Sep 2026about 3,600
Oct 2026 (to date)about 11,000

What we write #

About 8.9 million lines of code changed, and about 26 million with docs and data. Most of what we write isn't code.

Code Docs Data and config. Lines added plus lines removed. Single commits over 20,000 lines (corpus snapshots, imports, moves) are left out.
Show the numbers
MonthCodeDocsData and config
Nov 2025200K1.1M97K
Dec 2025300K830K130K
Jan 2026540K560K110K
Feb 2026570K1M84K
Mar 2026930K1.3M130K
Apr 20261M1.8M100K
May 20261M1.2M220K
Jun 20261.1M1.2M230K
Jul 2026500K560K210K
Aug 2026750K1.2M660K
Sep 2026480K840K400K
Oct 2026 (to date)1.5M1.6M1.7M

Written alongside Claude #

About 75% of our commits name Claude as a co-author. AI writes alongside us; we decide what ships.

Share of commits each month with a Claude co-author line. Many agent commits don't carry one, so the real share is higher.
Show the numbers
MonthShare
Nov 202580%
Dec 202580%
Jan 202685%
Feb 202675%
Mar 202680%
Apr 202665%
May 202665%
Jun 202665%
Jul 202680%
Aug 202675%
Sep 202665%
Oct 2026 (to date)85%

Tokens per month #

Estimated, team-wide · how we counted

About 920 billion tokens since May 2026, across everyone who builds here.

Estimated tokens per month. We have Claude Code's own records from May 2026 on; earlier months have no data, and we don't guess at them.

For scale: the models write about 250M tokens a month, including their reasoning. That's roughly 2,100 novels' worth of writing every month (estimated).

Show the numbers
MonthTokens
Nov 2025no data
Dec 2025no data
Jan 2026no data
Feb 2026no data
Mar 2026no data
Apr 2026no data
May 2026about 150 billion
Jun 2026about 160 billion
Jul 2026about 110 billion
Aug 2026about 150 billion
Sep 2026about 86 billion
Oct 2026 (to date)about 260 billion

Where the tokens go #

Re-reading context: over 95% Everything else, including what the model writes: under 5%

Almost every token is the agent reading its own conversation again: the code, the plan and the tool results so far, re-read on every turn so it can take the next step. On average, each new token is read back about 49 times. What the model actually writes is a sliver.

Re-reading is far cheaper than writing, so token volume isn't the same as cost, or as fresh work. Starting fresh sessions for new tasks, and handing reading-heavy work to helpers, saves far more than writing less.

How this compares #

There's no reliable yardstick for commits or lines per engineer. The famous "ten lines of code a day" isn't something Fred Brooks measured: he reported 600 to 800 debugged instructions a year for 1960s assembly-language programs, with design and testing included. The fairer comparison is with studies of AI coding tools:

Our numbers sit far outside all of these. That's a reason to publish them, not a claim to be some number of times faster. Volume isn't value, and the Carnegie Mellon result is a fair warning, so the next thing we want to measure is how much of this code is still in use months later.

What it produced #

The commits above became the projects on For Humans and For AI Agents: tools for people, from local newsrooms to patent groundwork, and places AI agents use themselves. Some are businesses, some are experiments, and a few have already been retired.

What these numbers don't mean #

Where the code lives #

About 130 repositories had pushes in the last 12 months, and 24 of them are public. The public ones live on GitHub, under five organizations:

Each project on the For Humans and For AI Agents pages also links to its own code.

How we counted #

Commits and lines come from the git history of every repository we pushed to in the last 12 months, counted by month, with bots, merges and forks left out. Tokens come from Claude Code's own records on a machine we measured, scaled up to the commits it didn't make. "Novels" assume about 0.75 words per token and 90,000 words per novel. Everything is rounded before it reaches this page.