Plotting AI model release cadence: two labs are accelerating, three aren't

Plotting frontier model release cadence, with methodology

Ethan Mollick made an offhand observation this month: if AI self-improvement is real, even weakly, then the labs that have it should ship faster over time, and the ones that don't should fall behind. He claimed this was already visible at Anthropic and OpenAI but nowhere else. I wanted to check whether the release data actually supports that, so I plotted it.

If AI self-improvement, even in a very limited way, is possible, the cadence of shipping both AI products, harnesses, and models should go up. This appears to be happening at Anthropic and OpenAI, but not for any other labs, including those that seemed to be catching up last year. Ethan Mollick, June 19, 2026 [1]

The claim is falsifiable, which is rare for AI-progress takes, so it's worth testing against data rather than vibes. Here's the cumulative count of major frontier model releases per lab since Q1 2023.

The thing to look at is which lines are bending. Anthropic and OpenAI don't just have the steepest slopes, their slopes increase toward the right. Google sat nearly flat through 2025, then sprinted in Q2 2026. Meta plateaued after Llama 4 in April 2025 and hasn't shipped a frontier model since. DeepSeek runs a steady quarterly cadence without accelerating.

To isolate acceleration, here's the annualized release rate, a trailing four-quarter window. On this view a flat horizontal line means constant cadence; an upward-bending line means accelerating cadence.

Two labs bend up. Three don't. Anthropic roughly tripled its annualized rate over the window; OpenAI more than doubled. Google held flat until a 2026 catch-up; Meta is in decline.

The recursion argument

There's a deflationary reading where this is just spending and headcount, and the cadence gap won't compound. The argument that it does compound rests on a specific loop: the labs use their own products to build their successors. Anthropic engineers use Claude Code to write training and eval infrastructure for the next Claude. OpenAI uses Codex on Codex. Each release improves the harness that produces the next release, so the next one ships sooner and better.

Note what this is and isn't. The deployed model is frozen between versions, so there's no online learning happening inside the weights. The recursion is at the level of the organization, not the model. Call it offline RSI: the loop closes across release cycles rather than within a forward pass. That's a much weaker claim than "self-improving AI," and it's the one the chart is actually consistent with.

Two other things landed in the same window that the recursion reading predicts. First, compute efficiency: Tri Dao's FlashAttention-4 hit 71% utilization on NVIDIA B200 in March 2026 [3], and Mamba-3, from the same group, was explicitly designed inference-first rather than training-first [4]. Cheaper training and inference per cycle means more cycles per quarter. Second, talent concentration: in the week of June 19, Noam Shazeer (Transformer co-author) joined OpenAI to lead architecture research, and John Jumper (AlphaFold, 2024 Nobel) left Google DeepMind for Anthropic [5]. Talent is flowing toward the labs already shipping fastest.

What would falsify this

The honest failure modes, since the whole point was to test a falsifiable claim:

• The slope stops bending. If the next two quarters show Anthropic and OpenAI flattening, the acceleration was a 2026 artifact, not a loop.
• A lagging lab ships true online learning first. If continual in-weights learning arrives from Google, an open-source effort, or anyone outside the cohort, the offline-RSI cadence advantage stops mattering.
• The release definition is doing the work. If you count point releases, the picture changes. I excluded them deliberately, but it's a judgment call, and the data file is the thing to argue with.
• Meta's plateau is strategy, not failure. Meta shifted toward open-weight and a different release philosophy; a flat frontier-release line may understate what they shipped.

So what

The chart doesn't prove AI is improving, and it doesn't prove recursion. What it shows is narrower and more defensible: two specific labs have a release cadence that is accelerating, and three don't, exactly as Mollick described. If you think that gap is a loop rather than a coincidence, it should keep widening. If you think it's funding or luck, it should regress. Either way, the next two quarters of release dates are a clean test, and the prediction is on the record.

For the markets-minded: the cleanest read-through, if the loop is real, is to the compute substrate (the fast labs spend concentrated dollars on GPUs and power) rather than to the labs themselves, which are mostly private. But that's a separate argument, and it's the speculative part. The chart is the defensible part.