Airbuild
Version 1.4
Release · September 2026

You decide
how hard it thinks.

Every model now carries its own effort level — and the Claude 5 models decide for themselves when a step deserves more thinking. Alongside that: the assistant really watches a video you attach — including the recording of an old application you hand over when you create a project — and a running turn no longer blocks your other projects.

Five highlights

What Version 1.4 adds.

Every demo runs on its own — this is how it looks in the workspace.

01
Models

Choose how hard a model thinks

Every model in the picker carries its own control: Low, Medium, High — side by side, without switching model or closing the menu. Claude Fable 5, Opus 5.5 and Sonnet 5 additionally offer Adaptive and start there: the model decides per step.

High is the new default — the better answer is usually worth more
Thinking is billed like the rest of the output; Low is there for the simple work
The level belongs to you and to that model, not to a project
Model & effort
Claude Opus 5.5newALMH
Claude Sonnet 5ALMH
GPT-6 SolnewLMH
GPT-6 LunanewLMH
AAdaptive — the model decides per stepLLowMMediumHHigh
Remembered per person and per model — not per project
New project
Rebuild this software — the source code is gone.
legacy-system-2011.mp418,4 MB · 00:42attached
The assistant watches
t=0.0s
t=2.4s
t=5.1s
t=7.8s
Video up to 50 MB · click or drag & drop
02
Starting a project

Show what you want rebuilt — on video

An old application whose source code is long gone: record it running and attach the recording when you create the project. The assistant watches it frame by frame — screens, fields, steps — and builds the first version from that.

By click or drag & drop, up to 50 MB per video
Say what is happening while you record — the narration is transcribed
Screenshots, PDFs and code still work exactly as before
03
Attachments

The assistant watches your video

A screen recording could be uploaded and shipped — but not watched. The assistant now sees it as timestamped frames: a coarse pass to find the moment, then a closer look at the seconds around it.

Identical frames collapse — “the picture did not move” is a finding
The narration can be transcribed: the explanation lives in the voice
A silent recording is reported as silent, not as empty
read_video · bug-report.mp4
Window 1.2 – 2.6 s
t=0.0s
form open
t=1.3s
click
t=1.6s
fields cleared
t=2.4s
9 unchanged
Narration
transcribing …
1.2–2.6 s · 8 frames/s
Your projects
shop-backendwriting tests
crm-portalbuilding the form
Another AI turn is already running for your account
Both running. No waiting.
04
Working

Two projects at once

A running turn blocked every other project in your account — half an hour, on a long turn. The lock guarded nothing the database was not already guarding, and it is gone.

One turn at a time per chat, as before
The workspace now speaks your language everywhere — chat, tests, agent flow, logs
Permission and session errors read in your language too
05
Publishing

One question, and a bar that moves

A publish can stop twice for a decision — open endpoints, security findings. Both dialogs used to stand on screen at the same time. Now one question is asked, and the second follows if it still applies.

The question reaches the person who started the publish
Progress creeps forward inside a step instead of standing still
The scanners count themselves off as they go
Publishing
checking endpoints9%
checking endpoints
One question at a time — and it reaches you
And much more

Everything else in Version 1.4.

Improvements across the platform — from chat and attachments to billing and published sites.

Chat & attachments
Attachments arriveimages and documents now reach every model, with their label
Design Mode takes filespaperclip, drag & drop and paste, like the chat
Attached videosare recognised as video and show a preview
GPT turns no longer stop shortthe 5.6 family ran with reasoning off — and ended mid-work
Organisation & budgets
Budgets can be editedlimit, alert threshold and whether it blocks — without losing the usage
No second budget at the same scopetwo of them made every check fail
Removing membersthe button does something — and is gone where it could only fail
Roles in both languagesand role menus that look the same in every browser
Platform & sites
A prompt from the websitesurvives sign-up and opens the build
Projects without a backendno longer wait on an endpoint check with nothing to check
Published siteskeep everything after the question mark when redirecting
Backends that could not starta broken schema parameter is repaired automatically

Ready for Version 1.4?

Active users find everything live in the workspace. New here? Start for free, no credit card.