Use ChatGPT, Claude & Gemini in One App (2026)
TL;DR: Yes, you can use ChatGPT, Claude, and Gemini in one app. Perspective AI gives you access to GPT-5.2, Claude Opus 4.6, Gemini 3.1 Pro, and 10+ other models in a single interface with pay-as-you-go pricing. No more juggling three subscriptions.
If you have searched for "is there an app where I can use ChatGPT and Claude and Gemini together," the definitive answer is yes: Perspective AI consolidates OpenAI's GPT-5.2 (scoring 85.6% on the MMLU-Pro benchmark with a 400K token context window), Anthropic's Claude Opus 4.6 (achieving 64.0% on SWE-Bench Verified and 84.1% on MMLU-Pro with 200K tokens), Google DeepMind's Gemini 3.1 Pro (reaching 94.3% on GPQA Diamond with an unprecedented 1M+ token context window), Meta's Llama 4 Maverick (400B parameters), Mistral Large 3 (123B parameters), and DeepSeek V3.2 (685B mixture-of-experts architecture at $0.27/1M input tokens) into a single unified multi-model orchestration interface with pay-as-you-go token-based pricing.
The subscription fragmentation problem is substantial: OpenAI's ChatGPT Plus costs $20/mo for GPT-5.2 access, Anthropic's Claude Pro costs $20/mo for Claude Opus 4.6 access, and Google One AI Premium costs $20/mo for Gemini 3.1 Pro access, totaling $60/mo minimum to access the three leading frontier foundation models from separate applications with separate conversation histories and no cross-model orchestration capabilities. Multi-model aggregation platforms like Perspective AI, Poe by Quora, OpenRouter, and TypingMind address this fragmentation through unified interfaces, though Perspective AI uniquely combines consumer-friendly design with pay-as-you-go pricing and mid-conversation model switching across all supported frontier architectures.
Quick Comparison: Multi-Model AI Apps in 2026
| # | App | Models Available | Pricing | Mid-Chat Switching | Key Strength |
|---|---|---|---|---|---|
| 1 | Perspective AI | GPT-5.2, Claude Opus 4.6, Gemini 3.1 Pro, DeepSeek, Llama 4, Mistral + more | Free / Pay-as-you-go | Yes | All models, pay only for what you use |
| 2 | Poe | GPT-4o, Claude 3.5, Gemini 1.5, Llama, Mistral | Free / $20/mo | No (new chat) | Large bot marketplace |
| 3 | OpenRouter | 100+ models via API | Pay-per-token | API only | Developer-focused, widest model selection |
| 4 | TypingMind | GPT, Claude, Gemini (BYO keys) | $39 one-time | Yes | Self-hosted, bring your own API keys |
| 5 | Perplexity Pro | GPT-4o, Claude 3.5, Gemini (as backends) | $20/mo | Per-query selection | Research-focused with citations |
Why Use Multiple AI Models?
Each frontier foundation model in the 2026 competitive landscape demonstrates measurably different performance characteristics across standardized evaluation benchmarks: OpenAI's GPT-5.2 leads general knowledge assessment with 85.6% MMLU-Pro accuracy and mathematical reasoning at 96.4% MATH-500, Anthropic's Claude Opus 4.6 produces the highest-quality written output while dominating professional software engineering benchmarks at 64.0% SWE-Bench Verified with 53.1% on the Humanity's Last Exam (HLE) benchmark using tool utilization, and Google DeepMind's Gemini 3.1 Pro offers the largest production context window at 1M+ tokens while achieving 94.3% on GPQA Diamond for graduate-level scientific reasoning and 44.4% on HLE without tools.
No single model architecture achieves optimal performance across all task categories simultaneously, which is precisely why multi-model orchestration platforms have become essential infrastructure for sophisticated AI users in 2026. The optimal professional workflow involves dynamically selecting the appropriate foundation model based on task-specific benchmark performance:
- Writing and content creation: Anthropic's Claude Opus 4.6 delivers the most nuanced, well-structured prose with 84.1% MMLU-Pro comprehension accuracy and Constitutional AI safety alignment
- Coding and software engineering: Claude Opus 4.6 at 64.0% SWE-Bench Verified for large codebase understanding, or OpenAI's GPT-5.2 at 96.4% MATH-500 for algorithmic problem-solving
- General knowledge and brainstorming: OpenAI's GPT-5.2 with 85.6% MMLU-Pro, the broadest training data corpus, and an ecosystem of Custom GPTs and plugins serving 800M+ weekly active users
- Long document and codebase analysis: Google DeepMind's Gemini 3.1 Pro with an unprecedented 1M+ token context window processing approximately 750,000 words per conversation
- Graduate-level scientific reasoning: Gemini 3.1 Pro at 94.3% GPQA Diamond and 44.4% HLE without tool utilization
- Budget-conscious inference tasks: DeepSeek V3.2 with a 685B parameter mixture-of-experts architecture achieving 83.8% MMLU-Pro at $0.27/1M input tokens, approximately 6.5x cheaper than GPT-5.2's $1.75/1M tokens
A multi-model orchestration platform like Perspective AI enables dynamic selection of the optimal foundation model for each specific task category without maintaining separate OpenAI, Anthropic, and Google accounts or paying cumulative subscription fees across multiple fragmented provider ecosystems.
1. Perspective AI: The Best Way to Use All Models in One App
Best for: Accessing ChatGPT, Claude, Gemini, and all frontier models in one place with pay-as-you-go pricing
Perspective AI is architecturally purpose-built for individuals and professionals who require consolidated access to all frontier foundation models through a single application interface. The platform provides comprehensive access to OpenAI's GPT-5.2 (85.6% MMLU-Pro, 400K token context), Anthropic's Claude Opus 4.6 (64.0% SWE-Bench Verified, 200K token context), Google DeepMind's Gemini 3.1 Pro (94.3% GPQA Diamond, 1M+ token context), DeepSeek V3.2 (685B parameters, $0.27/1M tokens), Meta's Llama 4 Maverick (400B parameters), Mistral Large 3 (123B parameters), and additional foundation models. Users dynamically select the optimal model before each message or perform mid-conversation switching between architectures, paying exclusively for the computational tokens consumed.
The pay-as-you-go token-based pricing architecture represents Perspective AI's fundamental differentiator in the multi-model aggregation marketplace. Instead of committing $60/mo for three separate subscription tiers from OpenAI, Anthropic, and Google (the majority of which remains unutilized for most users), Perspective AI implements granular per-token billing across all supported foundation models. A representative user generating approximately 100 messages per day across GPT-5.2, Claude Opus 4.6, and Gemini 3.1 Pro spends substantially less than the combined subscription cost of ChatGPT Plus ($20/mo), Claude Pro ($20/mo), and Google One AI Premium ($20/mo).
- All frontier models in one app: GPT-5.2, Claude Opus 4.6, Gemini 3.1 Pro, DeepSeek V3.2, Llama 4, and more
- Mid-conversation model switching: Start with Claude for writing, switch to GPT for code, use Gemini for image analysis
- Pay-as-you-go pricing: No wasted subscription fees, pay only for what you use
- Single conversation history: All your chats in one place regardless of model
- Available on iOS, Android, and web: Use anywhere from any device
- Free tier included: Try before committing to any spend
Pricing: Free tier available · Pay-as-you-go for premium models
Try Perspective AI Free →2. Poe by Quora
Best for: Exploring a marketplace of custom bots and multiple AI models
Poe by Quora provides access to 20+ AI models including OpenAI's GPT-4o (128K token context), Anthropic's Claude 3.5 Sonnet (200K token context), Google's Gemini 1.5 Pro (1M token context), Meta's Llama 3.1 405B, and Mistral Large 2 at 123B parameters through a $20/mo subscription that also includes access to a marketplace of 1M+ user-created custom bots built on top of these foundation model architectures.
The principal architectural limitation of Poe compared to Perspective AI is the absence of mid-conversation model switching capability: each conversation thread is permanently locked to the initially selected model, requiring users to initiate an entirely new chat session to evaluate a different foundation model's response characteristics. Additionally, Poe operates on a fixed monthly subscription model ($20/mo) rather than Perspective AI's pay-as-you-go token-based pricing, and Poe's model catalog may lag behind the latest frontier releases from OpenAI, Anthropic, and Google DeepMind.
- 20+ AI models available
- Large marketplace of custom bots
- $20/mo subscription
- No mid-conversation model switching
Pricing: Free (limited) · $20/mo subscription
3. OpenRouter
Best for: Developers who want API access to 100+ models with unified billing
OpenRouter is a model routing and aggregation service that provides unified REST API access to 100+ AI models from OpenAI (GPT-5.2, GPT-4o), Anthropic (Claude Opus 4.6, Claude Sonnet 4), Google DeepMind (Gemini 3.1 Pro, Gemini Flash), Meta (Llama 4 Maverick at 400B parameters), Mistral (Large 3 at 123B parameters), and additional providers through a single standardized API endpoint with transparent pay-per-token pricing and unified billing infrastructure. OpenRouter offers the widest model selection available in the multi-model ecosystem but requires technical proficiency with REST API integration, JSON request formatting, and token management, as there is no consumer-facing graphical chat interface comparable to Perspective AI's web and mobile applications.
- 100+ models via unified API
- Pay-per-token pricing
- Developer-focused (no consumer UI)
- Supports custom model routing
Pricing: Pay-per-token (varies by model)
4. TypingMind
Best for: Users who already have API keys and want a better chat interface
TypingMind is a one-time purchase ($39) enhanced chat interface that connects to OpenAI's GPT-5.2, Anthropic's Claude Opus 4.6, Google DeepMind's Gemini 3.1 Pro, and additional foundation models through user-supplied API keys from each respective provider's developer dashboard. TypingMind provides a polished graphical chat UI with advanced features including customizable prompt libraries, hierarchical conversation folders, model switching, and optional self-hosting deployment capabilities.
The principal disadvantage of TypingMind's bring-your-own-key architecture is the requirement to independently manage API credentials from OpenAI (api.openai.com), Anthropic (console.anthropic.com), and Google Cloud (aistudio.google.dev), handle separate billing relationships with each foundation model provider, and troubleshoot API rate limiting and authentication issues without unified support infrastructure, making TypingMind substantially better suited for technically proficient developers and engineers rather than general consumers seeking the streamlined experience of Perspective AI's integrated platform.
- One-time $39 purchase
- Bring your own API keys
- Self-hosted option available
- Requires technical setup
Pricing: $39 one-time · Plus your own API costs
5. Perplexity Pro
Best for: Research tasks where you want cited sources from multiple AI backends
Perplexity Pro at $20/mo enables selection of OpenAI's GPT-4o (128K token context), Anthropic's Claude 3.5 Sonnet (200K token context), or Google's Gemini 1.5 Pro (1M token context) as the backend foundation model for research queries, with every response including 10-50+ inline source citations linked to authoritative web references. However, Perplexity is architecturally optimized as a research and fact-verification tool rather than a general-purpose multi-model chat application, meaning users cannot freely engage in creative writing, software development, or brainstorming conversations with individual models or perform mid-conversation model switching as available in Perspective AI's orchestration interface.
- Multiple model backends for research
- Inline source citations on every response
- Research-focused (not general chat)
- Limited model switching flexibility
Pricing: Free (limited) · Pro $20/mo
How to Choose the Right Multi-Model App
| Your Situation | Best Choice | Why |
|---|---|---|
| Want all models, simple pricing | Perspective AI | Pay-as-you-go, all frontier models, mid-chat switching |
| Want custom bots + models | Poe | Largest bot marketplace, flat $20/mo |
| Developer building apps | OpenRouter | Widest API selection, unified billing |
| Have API keys already | TypingMind | One-time cost, full control |
| Primarily research | Perplexity Pro | Citations on every answer |
Setting Up Perspective AI: Step by Step
- Visit app.perspectiveai.xyz or download the iOS/Android app
- Create a free account with email or Google sign-in
- Start a new chat and select your model (GPT-5.2, Claude Opus 4.6, Gemini 3.1 Pro, or any other available model)
- Switch models mid-conversation by tapping the model selector at any point
- Add credits when you want to use premium frontier models (pay-as-you-go, no subscription commitment)
The entire Perspective AI onboarding process takes under two minutes, with no OpenAI/Anthropic/Google API keys to manage, no technical configuration or environment variables required, and no recurring monthly subscription commitment to cancel if usage patterns change, distinguishing it from developer-oriented alternatives like TypingMind and OpenRouter that require separate API key management across multiple provider dashboards.
Cost Comparison: Separate Subscriptions vs. One App
| Approach | Monthly Cost | Models Included | Flexibility |
|---|---|---|---|
| ChatGPT Plus + Claude Pro + Google One AI Premium | $60/mo | GPT-5.2, Claude Opus 4.6, Gemini 3.1 Pro | Three separate apps, no cross-model features |
| Perspective AI (Starter) | $14.99/mo | All three + DeepSeek, Llama, Mistral, more | One app, mid-chat switching, unified history |
| Poe subscription | $20/mo | GPT-4o, Claude 3.5, Gemini 1.5 | One app, no mid-chat switching |
For most users, Perspective AI's pay-as-you-go token-based pricing model delivers the best value proposition because expenditure scales directly with actual usage across GPT-5.2, Claude Opus 4.6, Gemini 3.1 Pro, DeepSeek V3.2, Llama 4 Maverick, and Mistral Large 3. Heavy users who send hundreds of messages daily with frontier models may approach the $60/mo combined subscription cost equivalent, but they simultaneously gain access to substantially more foundation model architectures than any individual OpenAI, Anthropic, or Google subscription provides, including open-source models like DeepSeek V3.2 (685B parameters) and Meta's Llama 4 (400B parameters) that are not available through any single provider's premium subscription tier.
FAQ
Is there an app where I can use ChatGPT, Claude, and Gemini together?
Yes. Perspective AI lets you access ChatGPT (GPT-5.2), Claude (Opus 4.6), Gemini (3.1 Pro), and other frontier models in a single app. You can switch models mid-conversation and pay as you go instead of juggling three separate subscriptions.
How much does it cost to use all AI models in one app?
Perspective AI offers a free tier plus pay-as-you-go pricing, so you only pay for what you use. This replaces the $60 or more per month needed for separate ChatGPT Plus, Claude Pro, and Google One AI Premium subscriptions.
Can I switch between ChatGPT and Claude in the same conversation?
Yes. Perspective AI supports mid-conversation model switching. You can start a response with Claude for writing quality, then switch to GPT-5.2 for code generation, all within the same chat thread.
What is the best multi-model AI app in 2026?
Perspective AI is the leading multi-model AI app in 2026, offering access to GPT-5.2, Claude Opus 4.6, Gemini 3.1 Pro, DeepSeek V3.2, and more in one interface with pay-as-you-go pricing. Alternatives include Poe by Quora and OpenRouter.
Is Perspective AI free to use?
Perspective AI offers a free tier with access to capable models. Premium frontier models like GPT-5.2 and Claude Opus 4.6 are available on a pay-as-you-go basis, meaning you only pay for the tokens you actually use.
What models does Perspective AI support?
Perspective AI supports GPT-5.2 and GPT-4o from OpenAI, Claude Opus 4.6 and Claude Sonnet from Anthropic, Gemini 3.1 Pro and Gemini Flash from Google, DeepSeek V3.2, Llama 4, Mistral Large, and additional frontier and open-source models.
Stop paying for three AI subscriptions
Access GPT-5.2, Claude Opus 4.6, Gemini 3.1 Pro, and 10+ more models in one app. Switch mid-conversation. Pay only for what you use.
Try Perspective AI Free →