> ## Documentation Index
> Fetch the complete documentation index at: https://docs.speckle.systems/llms.txt
> Use this file to discover all available pages before exploring further.
> ## Agent Instructions
> These docs contain multiple Speckle product experiences. For Speckle 2026.9, prefer /next/ pages for the topics and changes they cover. The navigation label Current does not override this version-specific precedence.
> Coverage under /next/ is incremental. Use Current documentation for unchanged topics and when a /next/ page says coverage is unavailable or explicitly refers you to Current. Do not infer a feature was removed from a missing page.
> Read the page-specific documentation status, applicability, affected guidance and replacement links in agent-only content. Impacted, changed and superseded apply only to the stated scope; they do not mean the entire feature is deprecated. Historical connector guides apply only to the legacy connector described.
> Match guidance to the customer's deployment version, model data format and connector. Respect plan, permission and compatibility restrictions. If an unknown version or data format changes the answer, ask a focused clarification; do not infer deployment version from the date alone.
# Compare 2026.8 and 2026.9
> What changes for you in 2026.9, next to how Speckle works today.
Documentation set: Speckle 2026.9. Status: current. Authority: canonical for this version and the coverage on this page.
Applies to version 2026.9, from 2026-09; this is not a rollout date for every deployment.
Authoritative Speckle 2026.9 documentation for the topic covered here. For Speckle 2026.9, prefer this page over conflicting earlier guidance. Follow the linked pages in the other documentation version for unchanged topics and where this page says coverage is not yet available. Respect data-format, deployment, plan, permission, and compatibility limitations stated in the page.
This is 2026.9 documentation. Coverage here is incremental: a page exists only where 2026.9
differs or is newly documented. For any other topic, switch to **Current** (2026.8 and earlier) in
the version selector.
Use this page to see what 2026.9 changes for you, next to how Speckle works today. For the
current product, switch to **Current** in the version selector.
If you only publish and load through Speckle connectors, your day-to-day work stays the same. The
rows below are the exceptions and dates that matter. For the full steps, see
[Speckle's data model is changing](/workspaces/data-model-migration).
## What's different
| What you do | Before 2026.9 | In 2026.9 | Learn more |
| ---------------------------- | ------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------- |
| Publish, load, and view | You publish and load through connectors and the web app | You still do. After your project moves to the new data format, those flows are faster | [What to do next](/workspaces/data-model-migration) |
| Models you already published | Your existing models stay readable | They stay readable. New publishes use the new format going forward | [What to do next](/workspaces/data-model-migration) |
| ACC sync or drag-and-drop | Uploads use today's data format | Uploads move to the new format. If another tool still needs the old format, ask Speckle to turn on compatibility mode. That option ends **1 November 2026** | [Who should pay closer attention](/workspaces/data-model-migration#who-should-pay-closer-attention) |
| Connector updates | Your current connectors keep working | Update them from **1 September 2026**, and no later than **1 November 2026** | [What you should do now](/workspaces/data-model-migration#what-you-should-do-now) |
| Speckle Intelligence | It looks at properties on each object | It can also see how parts of a model relate to each other — what connects to what, and what contains what | [What to do next](/workspaces/data-model-migration) |
| Data Validation | Checks, plus project standards on Enterprise | Project standards are not in 2026.9. Author checks. A later rollup from Checks to workspace standards is planned | [Data Validation in 2026.9](/next/analytics/data-validation/overview) |
| Open a model in the web app | Current viewer: section box, Selection info, Filters | New viewer: hybrid load, docked **Selection** / **Filters** / **Views**, section planes | [3D viewer in 2026.9](/next/3d-viewer/introduction) |
| Compare model versions | ··· **View changes** on a version opens a dedicated diff view | Deprecated — no diff view in the Models ··· menu. Ask Speckle Intelligence (Chat, the viewer sparkle, or a Report) to detect, report, and assess the impact of what changed | [Worked example](/next/workflows/assess-model-changes-with-intelligence) |
| Navisworks models | Publish from the desktop connector | No 2026.9 desktop connector. **2026.8** is last, and still advised at **200 MB**. Larger NWC/NWD: upload to **2 GB**, ACC tested to **6 GB** | [Navisworks in 2026.9](/next/connectors/navisworks/introduction) |
| Trimble Connect | Not available | New beta cloud sync on Team and Enterprise. Service account for background downloads; personal Trimble ID to browse | [Sync models from Trimble Connect](/next/connectors/cloud-integrations/trimble-connect) |
This table is a summary. Follow the linked page for steps and dates.
Connector-specific changes live under Publishing & Loading: [Revit in
2026.9](/next/connectors/revit/introduction), [Grasshopper in
2026.9](/next/connectors/grasshopper/introduction), [Power BI in
2026.9](/next/connectors/power-bi/introduction), [Navisworks in
2026.9](/next/connectors/navisworks/introduction), and [Trimble
Connect](/next/connectors/cloud-integrations/trimble-connect). Viewer chrome, **Selection**,
**Filters**, and **Views** are on [3D viewer in 2026.9](/next/3d-viewer/introduction). Until a
2026.9 page exists for another topic, use the guides under **Current** in the version selector.
## If you build on Speckle
If you use SDKs, APIs, Automate, or a self-hosted server, see
[Data model migration for developers](/developers/migration/data-model-migration). That page covers
SDK updates, compatibility mode for uploads, and when to stay on 2026.8. Holding notes for the
other developer tabs are under Developers in this preview.
## FAQ
Most people who publish and load through Speckle connectors keep the same workflow. 2026.9
details for Revit, Grasshopper, Power BI, Navisworks, and Trimble Connect are under Publishing &
Loading. Other design tools still use the connector guides under **Current** in the version
selector.
Use the guides under **Current** in the version selector. If there is no 2026.9 page for that
topic yet, the feature is still documented there. It did not go away.
No. Compatibility mode is only for ACC sync and drag-and-drop uploads when another tool still
expects the old format. It ends on **1 November 2026**. See [Who should pay closer
attention](/workspaces/data-model-migration#who-should-pay-closer-attention).