Hydra and ChatGPT
ChatGPT is OpenAI's assistant. Hydra brings models from several companies, OpenAI's included, into one chat.
| Hydra | ChatGPT | |
|---|---|---|
| Models | Claude, GPT, Gemini, Grok, DeepSeek, Mistral, Perplexity and more through OpenRouter (the ones connected to the site, plus any you add with your own key) | OpenAI's models only 1 |
| Several models answer at once | Yes: Fusion merges their answers and checks disputed claims on the web; Compare shows them side by side | Not that we found (ChatGPT uses OpenAI's own models) 1 |
| Free use | 10 messages, no account needed | Free account: everyday text chat on a smaller model; uploads, images, voice and deep research have limits 2 |
| Paid plans | Hydra Plus, £13.99 a month | Go $8 a month and Plus $20 a month in the US; Pro from $100 a month. OpenAI bills UK users in pounds but its pages show no pound prices 7,8,9,10 |
| Use your own API keys | Yes, free: the AI companies bill you directly | No (only for Codex, OpenAI's coding agent) 4 |
| Web search with sources | Yes, with numbered citations; Research writes a cited report | Yes, on every plan 5 |
| Projects and memory | Yes, with memory you can review, edit and switch off | Yes; memory is larger on paid plans 3 |
| Images | Yes, and photo editing from chat (when the site has Higgsfield connected) | Yes; limits depend on the plan 3 |
| Agents and automation | Scheduled tasks, Mission Control for multi-step jobs, and MCP connectors to your apps | ChatGPT Work: an agent that browses, uses your computer on desktop, runs scheduled tasks and connects to apps 6 |
The US prices are OpenAI's own; Go's price is localised in some countries. Plans, prices and limits change often: check ChatGPT's own pages for today's. We don't claim either is better at answering; that depends on the question and the models used.
Sources
- OpenAI Help: GPT-6 and other models in ChatGPT
- OpenAI Help: ChatGPT Free tier FAQ
- ChatGPT pricing
- ChatGPT pricing explained (OpenAI)
- ChatGPT Free plan
- OpenAI: ChatGPT for your most ambitious work
- OpenAI: Introducing ChatGPT Go
- OpenAI Help: What is ChatGPT Plus?
- OpenAI Help: About ChatGPT Pro tiers
- OpenAI Help: Multi-currency billing
More: Hydra and Poe · Hydra and T3 Chat. Try Hydra: your first 10 messages are free.