March 3rd 2026

Web app projects

Added web apps as a project type. Includes a live preview and interactive chat for vibe coding
Provides Convex for backend services
Sensible default development environment and settings for ease of use
Automatically deploys and configures TanStack codebase

Product and UX

Projects & workspaces: Organize repos and apps into projects, with improved onboarding and nicer defaults.
Chat quality: Better long-chat handling via compaction so sessions can continue without hitting context limits.
MCPs: Manage MCP connections from the web UI, with clearer re-auth prompts when needed.

Billing & limits

Increased monthly usage limits across all paid tiers.

Models

Added/updated models including Claude Opus 4.6, Gemini 3.1 Pro, GLM-5.
Allow model selection for free users.

February 6th 2026

Product and UX

Start building without linking a git provider.
Better handling of common failure modes.
Chats are now “agent sessions” with clearer scoping between sessions.
Cleaner task logs with improved tool-call rendering and live status.
Tasks started from chat now stay scoped to the current session.
Prevent duplicate messages while a chat run is already in progress.
Automatic team naming.

Infrastructure

Migrated sandboxes to Daytona for faster startup and responsiveness.

Integrations

Added Supabase and Vercel MCP presets.
Improved MCP auth/setup reliability.

Models

Added GPT‑5.2 Codex.
Added Kimi K2.5.

December 23rd 2025 ☃️

Live Previews (beta)

Live preview available in beta to all users.
Start new template project from cto.new.
Add build and run commands to task runner.
Setup agent attempts build and run commands.

Smarter model selection

Route tasks based on quality, speed, capacity, and cost.
Expanded model support, including:
- GPT-5.2
- Sonnet 4.5 - GPT 5.2 alloy
- Claude Opus 4.5
- Gemini 3 Flash preview)
- GLM-4.7
- MiniMax M2.1
- Devstral 2

Engine-agent chat improvements

Faster, more reliable task planning.
Better visibility into tool usage during runs.
Tasks started from chat are now properly scoped and isolated.
Simplified planning and draft task UX.

MCP overhaul

Unified MCP system with clearer setup and fewer edge cases.
Global MCPs can now be configured once and reused in agents and chats.
Per-chat MCP selection for more control.
Improved support for HTTP, SSE, and stdio MCPs.
Better error handling and clearer tool naming.

Reliability & performance

Faster VM startup times.
More robust VM lifecycle handling.
Better handling of temporary provider outages.

Benchmark

Introduced cto bench, measuring real-world task success rates across models.
Live chart and leaderboard updated every day.

UI & UX polish

Mobile improvements.
Keyboard shortcut: ⌘ + Enter throughout the app.
Create empty repo from cto.new.
Clearer task and preview states.
General responsiveness and stability improvements.

November 26th 2025

Product & UX

Add “get code” buttons for easily copyable git checkout commands for a task.
Add task preview in alpha.
Clearer draft PR/MR status.
Chats moved to their own page.
Add privacy mode for zero data use.

Models & Routing

Added GPT-5.1 and GPT-5.1 Codex and removed GPT-5 and GPT-5 Codex.
Added GPT-5.1 Codex Mini.
Added Gemini 3 Pro Preview.
Added Kimi K2 Thinking.
Added MiniMax M2.
Improved and updated auto model routing.

Infra, Events & Git

Harden events queueing and retries.
Update GitHub webhooks and improve git reliability.
Status page: status.cto.new.

November 15th 2025

Models

Added auto-model selection.
Haiku set as chat default for improved speed and tool calling.
Tasks started from drafts use preferred model.

Chat

Optimistic send for chat messages.
Cancel chat messages.
20k character message limit.

UI/UX

Git checkout command in task view.
Fix chat text area resizing, mobile fixes, dark-mode tweaks.
Surfaced secrets error messages.

Auth and Invites

Update invite eligibility to prevent abuse.
Google sign-in restored.

Reliability and Bugfixes

Fix diff saving.
Race fix on user/org creation.
Validate env/secret format.
Fix “ghost queued” tasks.

October 31st 2025 🎃

Chat & UX

Fixed chat text area resize.
Optimistic send - show user messages instantly.
Chat summaries: agent can now reference last 10 chats.

Models & Memory

Added memory to chat agent.
Improved chat label generation.
Added Haiku, improved Anthropic prompt caching.

October 29th 2025

Tasks & Workflow

Shorter draft titles.
Chat agent now aware of tasks.

Models & Execution

Anthropic fully restored (incl. Alloy).
Add GLM-4.6.
Improve prompt caching.

Abuse & Rate Limits

20k-char cap on first chat message.
Domain blocks for obvious botting.
Added CAPTCHA and bot blocks.

Git & Repos

Hardened git token fetching/retries.

Reliability & Ops

Removed legacy ticket plans/speculative mode; removed context7 MCP and Anthropic web_search tool.
Start routing tasks to Northflank for scalability.

UI

Dark mode.
Text area resize fixes.

October 22nd 2025

Access & onboarding

Invite UX: add invite button; generate all available codes.
Team invites: invited team members no longer need codes.
Sign-up protections to block bots.

Draft tasks & task UX

Prevent multiple tasks per draft.
Save draft edits on start; show actionable controls only when valid.

Models & routing

Add AWS Bedrock for Anthropic model failover.
Better labels & long-chat handling; include model name in system prompt.

GitHub & repos

Fix Start GitHub issue from @cto tag.
Branch selector no longer crashes if branch deleted.

Reliability & safety

Fewer flaky runs: increase events timeout; harden Git token fetching/retries; empty-repo/default-branch fixes.
Auto-ban abusive agent chat calls (unknown adapter/invalid schema).