Quotient Changelog: February 19, 2026

Here's what shipped this week — three marquee features, a handful of quality-of-life improvements, and several bug fixes.

Chat Model Selection

You can now choose which AI model responds to your messages. Sonnet 4.6 is the default, with Opus 4.6, Sonnet 4.5, and Haiku 4.5 available as selectable options. Your selection persists per session, giving you direct control over the speed/quality tradeoff depending on the task at hand.

Repost & Quote Tweets for X

Full repost and quote tweet support is now live. Attach a tweet URL, preview the quoted tweet inline in the editor, and publish retweets natively through Quotient. This rounds out our X integration and makes it easier to engage with conversations happening on the platform.

X Post Analytics

You can now view detailed performance analytics for your published X posts directly within Quotient. See impressions, likes, retweets, replies, quote tweets, and bookmarks — all without leaving the platform. This gives you a clear picture of how your social content is performing so you can iterate and improve.

Other New Features

• Blog Export (Markdown & PDF) — Download any blog post as clean Markdown (with frontmatter) or styled PDF from a new "More Options" menu.

• Use Cases Marketing Pages — New use cases listing and detail pages with a marketing grid, filters, and a hero rotator with typewriter effect.

• HEIC/HEIF Image Support — Upload photos directly from iPhone — HEIC/HEIF files are now supported as assets.

• Notification Preferences — Updated notification preferences UI for more granular control.

Improvements

• Upgraded to Claude Sonnet 4.6 — Default model updated across all agents; thinking mode switched to adaptive. Opus 4.6 added as a selectable option.

• X Token Revocation Handling — Expired or revoked X tokens now surface a clear reconnection prompt instead of failing silently.

• Slack Error Surfacing — Agent errors on Slack @mentions now show a warning reaction and error message instead of silent failure.

• Campaign Agent — Can now write mentions and configure knowledge doc ask agent; task descriptions are properly validated in the create-campaign tool.

Bug Fixes

• Streaming Heartbeat Race Condition — Fixed a critical bug where a heartbeat fetch during tool execution could permanently break streaming for a thread.

• Thread Naming — Fixed "Untitled Chat" bug and ensured message context propagates to the thread naming prompt.

• Email Template Newlines — Fixed templates losing newlines when sent via Gmail.

• Email Editor — Fixed text node editing, scroll-to-bottom on 14" MacBooks, and invalid style attribute handling.

• Editor Zoom/Pan — Refactored to a single source of truth, fixing toolbar zoom actions that silently did nothing.

• Email Delivery Status — Corrected soft/hard bounce classification.

• Various fixes — Attach topic bug, max tokens for non-streaming Anthropic calls, and null contentJson parsing crash.