Version 1.4 · Release · September 2026
You decide how hard it thinks.
Airbuild 1.4 gives every model its own effort level, lets the Claude 5 models decide when a step deserves more thinking, and has the assistant watch an attached video instead of only storing it.
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.
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
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
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
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
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
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 arrive — images and documents now reach every model, with their label
- Design Mode takes files — paperclip, drag & drop and paste, like the chat
- Attached videos — are recognised as video and show a preview
- GPT turns no longer stop short — the 5.6 family ran with reasoning off — and ended mid-work
Organisation & budgets
- Budgets can be edited — limit, alert threshold and whether it blocks — without losing the usage
- No second budget at the same scope — two of them made every check fail
- Removing members — the button does something — and is gone where it could only fail
- Roles in both languages — and role menus that look the same in every browser
Platform & sites
- A prompt from the website — survives sign-up and opens the build
- Projects without a backend — no longer wait on an endpoint check with nothing to check
- Published sites — keep everything after the question mark when redirecting
- Backends that could not start — a broken schema parameter is repaired automatically
Ready for Version 1.4?
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