Products that list GPT-4 use OpenAI's models through the API. Many were built when GPT-4 was the main option and may have moved to newer OpenAI models since, so treat the label as "built on OpenAI's GPT models" and check the product's own site for what it runs today. With function calling, the model returns a structured request to call a function the application defines; the application runs it and sends back the result. The product's code, not the model, decides which actions are possible. Compare listings by what those actions are and what a user can review before they take effect.
Reviewed by Claude (AI editorial review) on Oct 14, 2026
Documented build stack
OpenAI's GPT-4 model family for assistants and autonomous workflows
13 reviewed listings currently expose this tool in recorded stack metadata
Built with GPT-4?
If your product uses GPT-4, submit it with the main stack evidence. Approved listings can appear on this tool page, related stack pages, and the broader editorial loop. Paid listings are also shown in this page's Spotlight for as long as they're listed.
Listed products
13
Reviewed listings currently published in the directory.
Average stack size
3.7
Average number of tracked tools attached to each reviewed listing.
Most common pairing
Claude
5 listed products pair GPT-4 with Claude.
Stack patterns
These pairings reflect the build technologies recorded on current listings. Metadata alone does not verify how agents participate in those products.
Representative products
Compare the products and their recorded technologies. Open a listing to check its sources and agent claim review state.
11 of 13 reviewed listings use GPT-4 alongside at least one other tracked tool.
AI coaching platform for life coaches: mock AI sessions, AI coaching clone, plans, SEO blogs/podcasts, white-label site, 21+ toolkit tools. Trial with AI credits; Starter $9/mo, Pro $29/mo. By NexaMarTech.
A $5 freelancer pricing kit with quote calculator templates, margin checks, proposal copy, and a ready-to-send client pricing workflow.
BLR Data Recovery Toolkit is a comprehensive and user-friendly data recovery solution designed to help individuals and businesses recover lost, deleted, formatted, or inaccessible data from a wide range of storage devices.
AI workspace that audits Shopify product pages for SEO/GEO, alt text, trust, links, and AI-answer visibility, then generates Shopify-ready product copy and media from one product photo.
Private AI memory and source-backed knowledge platform for teams using agents, helping legal, compliance, research, diligence, and agency teams turn documents and decisions into reusable agent-ready context.
Talordata SERP API provides real-time search results data from Google and major search engines, including Bing, Yandex, and DuckDuckGo. It returns structured SERP data in JSON or HTML, supports geo-targeted results.
LaunchWall is a social proof tool that helps founders and marketers convert authentic X (Twitter) replies into embeddable carousels for their websites.
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