JSON Placeholder
JSON Server
mocki Fake JSON API
httpbin(1)
MockRest
Nacapi
Format JSON Online
A hosted REST-API ready to respond to your AJAX requests.

ChatGPT
Gemini
Claude AI
Claude by Anthropic
OpenRouter
Eden AI
DeepSeek
GPT-3 access without the wait

Which is more popular?
Based on our record, OpenAI seems to be a lot more popular than ReqRes. While we know about 413 links to OpenAI, we've tracked only 21 mentions of ReqRes.
Website, pricing, platforms and company facts side by side.
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ReqRes
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| Website | reqres.in | openai.com |
| Pricing | โ | |
| Company | โ | Startup from the United States |
| Listed in |
What each product offers, as listed by its team.

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An editorial look at what each product does well and who it suits.

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OpenAI GPT-3 - Good At Almost Everything! ๐ค
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External articles and on-site reviews we used to compare the two products.

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But let's cut through the hype. When you actually look under the hood of what OpenAI Sites provides versus what Hatrio has spent years perfecting, a very clear divide emerges. OpenAI has built the ultimate IT...
OpenAI is an artificial intelligence research laboratory consisting of the for-profit corporation OpenAI LP and its parent company, the non-profit organization OpenAI Nonprofit. OpenAI is driven by the goal of...
Recommendations tracked on public social media and blogs since March 2021.

Https://reqres.in/ - roughly that much in ads revenue. Would love to add a paid plan for more features, but....time. - Source: Hacker News / almost 2 years ago
Reqres.in - A Free hosted REST-API ready to respond to your AJAX requests. - Source: dev.to / over 2 years ago
As stated earlier we are using the REQ | RES API in the example, you can check it out to see all the methods it provides. Now, go to the core/internet_services/ create a dart file and name it paths.dart, this will contain the baseurl and... - Source: dev.to / over 3 years ago
That's more than four times the previous rewards, and it puts OpenAI's program among the most generous in tech. The message to the security community is unmistakable: we want your best work, and we'll pay for it. Researchers can find the... - Source: dev.to / 1 day ago
The Copilot work from earlier in the cycle is where the agentic usage shows up. Version 18.9 added a Git agent that reviews uncommitted changes and commits, with inline comments, on both GitHub and Azure DevOps repos. Version 18.10 let... - Source: dev.to / 6 days ago
As of October 2026, major CLI-based AI coding agents have matured significantly, providing native mechanisms for remote interaction. Claude Code 2.1.310 introduces the claude remote-control functionality, which allows developers to... - Source: dev.to / 7 days ago
When comparing ReqRes and OpenAI, you can also consider the following products.

JSON Placeholder is a modern platform that provides you online REST API, which you can instantly use whenever you need any fake data.
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Get a full fake REST API with zero coding in less than 30 seconds. For front-end developers who need a quick back-end for prototyping and mocking
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Gemini, formerly known as Bard, is a generative artificial intelligence chatbot developed by Google. Based on the large language model (LLM) of the same name, it was launched in 2023 in response to the rise of OpenAI's ChatGPT.
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mocki Fake JSON API is an advanced platform that offers you to create API for personal use or testing purposes.
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Claude is a next generation AI assistant built for work and trained to be safe, accurate, and secure. An AI assistant from Anthropic.
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