linkWhich productivity apps let you query multiple AIs?

Six major note-taking, task, and planning apps now offer user-selectable multi-AI-provider querying as a built-in or first-party feature — but none support all four providers you specified. Amplenote and Capacities come closest, each covering four of the four (including Grok), while Notion and ClickUp cover three. The remaining dozen-plus apps either lock users to a single provider, hide provider selection behind automated routing, or ship no first-party AI at all. The market for genuine multi-AI productivity tools — where you can compare responses side-by-side while managing notes and tasks — effectively does not exist yet.

linkThe six apps that offer real multi-provider choice

These apps let users actively choose which AI provider handles their query, either through a dropdown, model picker, or API key configuration. All support at least two of the four target providers (Claude, Gemini, GPT-4/5, Grok).

Notion offers the most polished experience among note-centric apps. Its built-in AI supports OpenAI, Anthropic (Claude), and Google (Gemini) with a model picker that lets users manually select which provider handles each query. An "Auto" mode intelligently routes requests to the best-fit model — coding tasks to Claude, large-context work to Gemini, general tasks to GPT. Context persists across model switches mid-conversation. This is available on Business and Enterprise plans with no API keys required. Grok is not supported.

Amplenote has the broadest provider support of any note-taking app. Its first-party AmpleAI plugin (built by Amplenote staff) supports OpenAI, Anthropic, Google, xAI (Grok), DeepSeek, and Ollama — six providers, and the only note app covering all four target providers. The trade-off is a BYOK (bring-your-own-key) model: users must supply their own API keys for each provider. Once configured, users can try different providers for the same query and track per-model usage via a built-in dashboard. There is no side-by-side comparison view — you query one provider at a time and can re-run with another.

ClickUp leads among task management apps. ClickUp Brain (a $7/user/month add-on) exposes a model selector in its "Ask AI" chat interface with access to OpenAI (GPT-4o and newer models), Anthropic (Claude Sonnet and Opus-class models), Google (Gemini Flash), and DeepSeek. Users pick a model from a dropdown before each query and can switch freely between queries. ClickUp markets this as a cost-saving play — one subscription replacing separate ChatGPT Plus, Claude Pro, and Gemini Advanced accounts. Grok is absent.

Airtable provides the deepest enterprise-grade multi-provider setup. Its AI features support models from OpenAI, Anthropic (via Amazon Bedrock), Google (Gemini), Meta (Llama), IBM, and Amazon (Titan/Nova). On Business and Enterprise Scale plans, workspace admins control which providers are enabled, and individual users select models when configuring AI Fields and agents. Free and Team plan users get Airtable's default selection without choice. The Omni conversational assistant specifically requires OpenAI or Anthropic models. No Grok support.

Capacities stands out as the only knowledge-management/PKM tool with five-provider support. Following a significant update, its built-in AI assistant supports OpenAI, Anthropic, Google, Mistral, and xAI (Grok) via BYOK API keys. Users configure keys in settings, assign them to specific spaces, set monthly budget caps, and designate a preferred provider. Capacities' own AI infrastructure handles requests by default, falling back to user-supplied keys when its daily budget is exceeded. Like Amplenote, Capacities is one of only two apps supporting Grok.

Asana rounds out the list with more limited multi-provider access. Its AI Studio workflow builder lets users choose between OpenAI (GPT-4o, GPT-4o mini) and Anthropic (Claude 3.5 Sonnet, Claude 3 Haiku) when configuring AI agents. This is model selection during agent setup rather than a per-query toggle — once an agent is configured with a model, it uses that model consistently. Asana also offers first-party "AI Connectors" to ChatGPT, Claude, and Gemini, but these work in reverse: they let you access Asana data from those external AI tools, not query those providers within Asana. No Gemini or Grok as selectable in-app providers.

linkWhat the multi-provider experience actually looks like

No app in this group offers true simultaneous side-by-side comparison of responses from multiple AI providers. The experience falls into three patterns:

User-selectable dropdown is the most common. Notion, ClickUp, and Airtable each present a model picker where you choose a provider before sending your query. You see one response at a time. To compare providers, you'd need to manually re-run the same prompt with a different model selected — a sequential, manual process. Notion's Auto mode adds intelligent routing on top, choosing the provider for you when you don't want to decide.

BYOK with provider switching is how Amplenote and Capacities work. After entering API keys, users can direct queries to different providers, but there's no built-in comparison UI. Amplenote's usage tracking helps users understand which models they rely on most. Capacities adds budget controls and space-specific provider assignments, letting users dedicate certain workspaces to certain models.

Workflow-level model selection describes Asana's approach. You pick a model when building an AI agent or automation, and that choice persists for the life of that workflow. This is less about interactive querying and more about powering automated processes with your preferred model.

linkApps designed around multi-AI querying

Several apps are built specifically for querying multiple AI models, but none of them are genuine note-taking, task management, or planning tools. The market has bifurcated: productivity apps add AI as a feature, while multi-AI platforms add light productivity features as an afterthought.

HaloMate comes closest to bridging the gap. It offers GPT, Claude, Gemini, Grok, and DeepSeek with model switching mid-chat and side-by-side response comparison. It adds Projects for organizing files and chats, persistent AI "Mates" with long-term memory, and export to Markdown/DOCX. But it lacks a real note editor, task lists, or database features — it's a professional AI chat workspace, not a Notion competitor.

TypingMind is a BYOK frontend for all major AI models with strong organizational features: project workspaces, prompt libraries with variables, a RAG knowledge base, and 60+ pre-built agents. It's powerful for power users but remains fundamentally a chat interface, not a productivity app.

ChatHub and Poe offer genuine simultaneous multi-model comparison (ChatHub shows four models side-by-side), but neither has any note-taking or task management features whatsoever. Fello AI provides a polished Mac-native multi-AI experience but is similarly chat-only.

The gap between "multi-AI comparison tool" and "productivity app with multi-AI support" represents a clear market opportunity. As of early 2026, no single product does both well.

linkSingle-provider apps and those with no AI at all

Several prominent apps are locked to one provider or offer no first-party AI, making them notable omissions from the multi-provider landscape:

Single-provider apps include Craft (Anthropic/Claude only, with Fast and Max tiers using Haiku and Sonnet-class models), Evernote (OpenAI only, developed in close collaboration with OpenAI for its v11 relaunch), Mem (OpenAI/GPT-4 only, with no model selection exposed to users), and Coda (OpenAI only, though the company has stated it is testing other models). Each of these deeply integrates AI but gives users zero choice over which provider powers it.

Auto-routed multi-provider apps deserve a special category. Monday.com uses Azure OpenAI, Anthropic (via AWS Bedrock), and Mistral behind the scenes, but the system — not the user — decides which model handles each request, and custom model selection is explicitly unsupported. Todoist similarly uses multiple LLMs via AWS Bedrock and Google Vertex AI internally, with its Ramble voice feature specifically running on Gemini, but exposes none of this to users. Apple Notes routes between Apple's on-device models (for editing tasks) and ChatGPT (for generative composition) automatically, with no user choice. Linear does not even disclose which provider(s) power its AI features.

Apps with no first-party AI include Obsidian (all AI comes from its 2,700+ community plugins — none from Obsidian's developers, though official MCP support lets external AI tools access vaults), Roam Research (no native AI; the popular LiveAI extension is community-built), Bear (developer Shiny Frog has explicitly stated privacy concerns prevent AI adoption, and no AI features exist), and Things (no AI from Cultured Code; only Apple's system-level Writing Tools work in the app).

linkConclusion

The multi-AI provider landscape in productivity apps as of early 2026 clusters around a clear hierarchy. Amplenote and Capacities are the only apps supporting all four target providers (Claude, Gemini, GPT, and Grok), both via BYOK API keys. Notion and ClickUp offer the most polished multi-provider experiences across three providers without requiring API key setup. Airtable provides the broadest raw model access but gates meaningful choice behind enterprise plans. The biggest structural finding is that no productivity app offers true simultaneous multi-model comparison — the side-by-side response pattern seen in dedicated tools like ChatHub hasn't crossed over into the note-taking or task management world. For users who want to compare AI responses within a productivity workflow, the current workaround is sequential re-querying with different models selected, or using a dedicated multi-AI chat tool alongside their productivity app of choice.