Changelog

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Changed

• Per-second and per-hour pricing in dollars. Model pricing is now displayed as US-dollar rates on the Pricing & Billing page.

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New

• Pricing & billing docs. Published Pricing & Billing, covering session pricing, idle vs. active billing, and recoverable-state behavior.
• Beta status callouts. Added a banner across docs and the Overview noting that Reactor is in beta. APIs and pricing may evolve.

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New

• Token TTL with expires_after. Auth tokens now carry an expires_after field so clients can refresh proactively instead of waiting for a 401. See Authentication.

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New

• File uploads in the Python SDK. reactor-sdk now supports upload_file() returning a FileRef that can be passed into send_command().
• File uploads in the JavaScript SDK. uploadFile() and FileRef are available in @reactor-team/js-sdk for passing files (images, audio, blobs) as command arguments.
• New concept page: File Uploads documents the upload-then-reference pattern in both SDKs.

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Breaking

• Token endpoint is now POST. The auth-token endpoint moved from GET to POST to allow request-body parameters. Update any direct API callers; the SDKs handle this automatically once upgraded.

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Breaking

• New SDK protocol. Wire-level protocol overhaul shipped in @reactor-team/js-sdk 2.7 and reactor-sdk 0.4. Older SDK versions will no longer connect. Upgrade to the latest release.
• Removed fetchInsecureToken() and JWT helpers. The development-only insecure token helpers were removed; all auth now flows through the standard token endpoint.

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Improved

• Maple theme refresh. Docs site updated to Mintlify’s Maple theme with Lucide icons, new codeblock styling, and refreshed colors.
• Navigation split into separate “SDK” and “API Reference” tabs.

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New

• Image conditioning for Helios. set_image() accepts a reference image to steer generation, with cut or blend transitions for swapping mid-stream. See Helios.

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Improved

• Image size guidance clarified: 64KB limit with JPEG quality 0.5 recommended for set-image calls.

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Breaking

• API renames in @reactor-team/js-sdk 2.6.0. Several public methods and types were renamed for consistency with the Python SDK. Update import paths and call sites.

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New

• Helios launch. Reactor’s first interactive real-time video generation model, built on a 14B-parameter Diffusion Transformer. Produces a continuous infinite stream you can steer with prompts and reference images.
• Helios prompt guide. A dedicated Prompt Guide covering scene composition, transitions, and steering techniques.

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Improved

• Renamed “Realtime AI” → “Realtime Video AI” across the docs to better reflect what Reactor does. No API or SDK changes.

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New

• Python SDK launched. reactor-sdk is now available on PyPI, async-first, with parity for sessions, commands, and message handling. See Using the SDK.

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Breaking

• sendCommand() replaces sendMessage(). The command API was renamed to clarify the distinction between commands (client → model) and messages (model → client). Update all sendMessage call sites. See Commands and messages.
• Removed message queueing. Commands now have explicit waiting state instead of implicit queueing. Applications can decide whether to drop, replace, or buffer in-flight commands.

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Breaking

• JWT auth replaces insecureApikey. All client connections now require a short-lived JWT minted server-side from your API key. The insecureApikey development flow is removed.
• New API Reference section. Published a complete API Reference covering the Reactor class, React components, hooks, types, and events.

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New

• Reactor docs site launched. Initial release with Overview and Quickstart. Ported from the legacy readme.io site.