Photo by Jakub Żerdzicki on Unsplash
OpenAI and Anthropic don't sell a bundle, but you can use GPT and Claude in one app for less than $40 a month. Here's how, and what it costs.
Not from OpenAI or Anthropic. Neither company sells a bundle, and neither lets you use the other's models, so paying for both means two subscriptions: 20 for ChatGPT Plus and 20 for Claude Pro, or $40 a month. The way to get GPT and Claude under one subscription is an app that runs models from both companies and charges you once.
That's what Zemith is. One subscription gets you GPT, Claude, Gemini, Grok and more in the same chat, on web, iOS and Android.
20 a month in the US as of September 2026, so 480 a year together.29.99 a month, or 299.88 a year) gives you the flagship models from both companies, GPT 6 Sol, GPT 6 Astra and Claude 5.5 Opus, in one app. That's $180 a year less than the two subscriptions.Professional is the like-for-like swap. It includes GPT 6 Sol and GPT 6 Astra from OpenAI and Claude 5.5 Opus from Anthropic. ChatGPT itself only offers GPT-6 Astra on its Pro plan, which starts at $100 a month.
Plus is the cheaper option. It's the better fit if Claude Sonnet is the model you use most and you don't need GPT-6's reasoning models.
| ChatGPT Plus + Claude Pro | Zemith Plus | Zemith Professional | |
|---|---|---|---|
| Price | $40/mo | 15.99/mo (179.88/yr) | 29.99/mo (299.88/yr) |
| OpenAI models | GPT-6 reasoning models | GPT 6 Luna | GPT 6 Sol, GPT 6 Astra |
| Anthropic models | Opus, Sonnet, Haiku | Claude 5 Sonnet, Claude 4.5 Haiku | Adds Claude 5.5 Opus |
| Also included | Nothing from other companies | Gemini 3.1 Pro, Grok 4.7, Perplexity Sonar, DeepSeek, Kimi, Qwen, Mistral | Everything in Plus, plus Perplexity Sonar Pro and Cloud tasks |
| Deep research, images, video | Research in both, images in ChatGPT, no video | All included | All included |
| Apps | Two apps | Web, iOS, Android | Web, iOS, Android |
Prices are from OpenAI, Anthropic and Zemith's pricing page, checked September 27, 2026.
On the two subscriptions alone, Professional saves 180 a year. If Plus covers what you use, you save 300 a year.
The bigger saving is usually the rest of the bill. People who pay for ChatGPT and Claude often pay for a research, image or video tool as well, and Zemith covers those jobs:
| What you pay for today | Per year | Zemith plan | You save per year |
|---|---|---|---|
| ChatGPT Plus + Claude Pro | $480 | Professional | $180 |
| ChatGPT Plus + Claude Pro + Perplexity Pro ($20/mo) | $720 | Professional | $420 |
ChatGPT Plus + Claude Pro + Midjourney (10/mo) + [Runway](https://runway.com/pricing) (15/mo) | $780 | Plus or Professional | 480 to 600 |
The yearly totals use each company's monthly price, and Zemith is shown at its yearly price.
Besides the price, the big win is that your work stays in one conversation. In Zemith you switch models mid-chat and the next model picks up where the last one stopped. Your project files, instructions and memory stay with you. Getting a second opinion from another model takes one click instead of copying everything into another app.
For example, you can:
The tools that usually need their own subscriptions are built in too:
Zemith has more than 70,000 users and is rated 4.6 out of 5 on the App Store and Google Play.
Zemith plans use credits instead of per-app message caps. Plus includes 1.5 million a month and Professional 3 million. Everyday chat, writing and research use little of that. Images and video use the most:
If you need more, top-ups are $10 for 800,000 credits.
Keep one if you use a coding agent every day. Codex comes with ChatGPT and Claude Code comes with Claude Pro. The same goes if you depend on something only one app has, like custom GPTs or Claude's browser extension.
If you mostly chat, write, research and create, you're paying twice for overlapping apps.
Poe also has models from many companies, but its $19.99 plan now includes 660,000 points a month, down from 1,000,000 in July 2026. Reasoning and video models use those points quickly.
Paying the OpenAI and Anthropic APIs directly works for developers with light use. It means managing keys, a separate chat app, and a bill that's hard to predict.
For how GPT and Claude compare as assistants, see ChatGPT vs Claude.
We compared the published plans on the OpenAI, Anthropic, Perplexity, Midjourney, Runway and Poe websites with Zemith's plans and credit rates on September 27, 2026. OpenAI shows local prices outside the US (Plus is SGD 30 in Singapore), and all of these plans change often.
Bottom line: you can't buy ChatGPT Plus and Claude Pro as one subscription, but you don't need to. Zemith Professional gives you the top GPT and Claude models in one app for 29.99 a month. Zemith Plus covers Claude, Gemini and Grok for 15.99. Both include the research, image and video tools you'd otherwise pay for separately.
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