Changelog

Follow new updates and improvements to Happycapy.

July 21st, 2026

New

  • Added support for the Kimi K3 model

Improvements

  • Retired the Kimi K2.6 and MiniMax M2.7 models

July 14th, 2026

New

  • Added the Seedream 5.0 Pro image generation model

  • Added a Grok 4.5 model page

  • Added i18n localization for blog and tools pages across es, ko, ja, and more

July 10th, 2026

New

  • Added support for the Grok 4.5 model

Improvements

  • Improved the create slides UI

  • Improved multi-language localization for the /blog and /tools marketing pages

  • Improved system-prompt caching to be shared across sessions

  • Reduced non-essential background traffic for non-Claude models

  • Limited free users to 1 concurrent video generation

Bug Fixes

  • Fixed a bug where team renewal combined with a seat reduction incorrectly deducted credits into negative

July 3rd, 2026

New

  • Relaunched the Fable 5 model

  • Added Google Omni Flash video generation model

  • Added Google Nano Banana 2 Lite image generation model

July 2nd, 2026

New

  • Added support for the new Sonnet 5 model with an upgrade toast

Improvements

  • Reduced sandbox startup time when an image update is required

  • Improved the range of models supported by the generate image skill

  • Optimized sandbox build cache by saving it to the fly.io registry, reducing image size per update

Bug Fixes

  • Fixed empty model field in sub-session chat events

  • Fixed team usage to hide deleted members and correct the All Members view

  • Fixed a bug where unsupported models were directed to the paid upgrade flow

June 25th, 2026

New

  • Added a $5 discount toast shown after free users complete their first task

Improvements

  • Added a Mac Mini AI Server 2026 blog article

  • Added the Humanizer Article Writer tool page

  • Updated the discount checkout loading page to use the CapyLoader animation

  • Improved session title generation to match the language the user asks questions in

June 24th, 2026

Improvements

  • Locked the model selector to Sonnet 4.6 for free users

  • Improved pricing page copy and the slash-command selector

  • Added effort and thinking switching support for GLM 5.2 and DeepSeek V4 Pro

  • Switched the sandbox browser task model to openai/gpt-5.4

  • Improved the team usage chart with per-member viewing

Bug Fixes

  • Fixed project card rendering in share mode and enabled opening previews from the conversation

  • Fixed the expired "credits exhausted" card to be hidden when not on the last message

June 23rd, 2026

New

  • Added SDK session update and delete endpoints, with friendlier errors on creation failure

  • Added "Continue" instead of "Upgrade" in conversations after credits are restored

  • Added 4 new tools pages

  • Added 5 blog articles

Improvements

  • Improved model selector with per-model effort configuration and a new Haiku thinking entry

  • Upgraded video generation with alibaba happyhorse to 1.1

  • Switched gpt-image-2 to Openrouter

  • Added gpt-5.4 (bedrock) to supported OpenAI models

  • Disabled switching between Claude and non-Claude models within a session

Bug Fixes

  • Fixed streaming thinking blocks rendering duplicates and their expand/collapse state being overwritten

  • Fixed the Image Upload Not Available popup being obscured by the input box

June 18th, 2026

New

  • Added mobile Fork Session / Fork from here entry

  • Added 3 new tools pages

  • Added 5 blog articles

Improvements

  • Improved telemetry by filtering out all browser extension errors

Bug Fixes

  • Fixed skills being unable to call the Claude API

  • Fixed Kimi 2.7 Code billing issue

June 17th, 2026

New

  • Added display of thinking duration after each thinking completes

  • Added Kimi K2.7 Code model to production

  • Added 4 blog articles

Improvements

  • Improved first-screen load performance by making third-party scripts (Google Fonts, gtag, Turnstile) non-blocking for page rendering