platform.openai.com · Model APIs
Developer platform for OpenAI's models, with the Responses API, tools, fine tuning, embeddings and realtime voice endpoints.
OpenAI API is one of 6 model API tools on Intelsi. See all model API tools or how we check facts.
// guides
ChatGPT vs LLM explained: an LLM is the model that predicts text, while ChatGPT is OpenAI's app built on several of them. See what each is and which you need.
ChatGPT vs Enterprise explained: how personal plans, ChatGPT Business and ChatGPT Enterprise differ on price, privacy, admin controls and who should buy each.
Is Anthropic API free? Keys are free and new users get a small test credit, but Claude API calls are prepaid per token. Prices, plan credits, student options.
Kimi K3.1 Pro explained: Moonshot's new 1 million token flagship, the Highspeed version, API and plan prices, the November 4 weights date and its cyber limits.
Qwen Chat vs ChatGPT in October 2026: Alibaba's free Qwen3.8-Max app vs OpenAI's GPT-6 plans, features, privacy, data location and who should pick which.
ChatGPT vs ChatGPT Classic explained: what changed in OpenAI's new desktop app, what Classic still gets, who should switch and how to move over safely.
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AI21 Labsai21.comIsraeli lab behind the Jamba hybrid SSM-transformer models, aimed at long context enterprise workloads.Model APIsSee siteHN 1
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Google AI Studioaistudio.google.comBrowser workspace for prototyping with Gemini models and generating API keys, with a generous free tier for experimentation.Model APIsFreemium
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