# AI tools for “GPT API”

1,587 matching tools; showing 24, ranked by relevance.

Filters: `group=coding-development`

Related categories: [ai-api](https://openaitools.app/category/ai-api.md)

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Why it matched | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [OpenAI Platform](https://openaitools.app/tool/openai) | 234,678,639 | -9.6% | Paid | Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents. | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/openai.md) |
| 2 | [ChatGPT](https://openaitools.app/tool/chatgpt-4) | 6,048,022,723 | +2.2% | Freemium | OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research. | keywords 57%; semantic match | [.md](https://openaitools.app/tool/chatgpt-4.md) |
| 3 | [AI/ML API](https://openaitools.app/tool/ai-ml-api) | 232,946 | -20.1% | Pay-as-you-go credits (free to start); enterprise custom pricing on request | One universal API for 500+ AI models and 1,000+ agentic tools | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/ai-ml-api.md) |
| 4 | [OpenRouter](https://openaitools.app/tool/openrouter-ai) | 19,941,437 | -6.2% | Paid | One API key for hundreds of AI models from every major provider | category: ai-api; semantic match | [.md](https://openaitools.app/tool/openrouter-ai.md) |
| 5 | [APIMart](https://openaitools.app/tool/apimart) | 383,148 | +6.3% | Freemium, Paid | One OpenAI-compatible API for 190+ text, image, video and audio models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/apimart.md) |
| 6 | [ZeroGPT](https://openaitools.app/tool/zerogpt) | 32,864,541 | +19.7% | Freemium, Paid | AI content detection and a full writing toolkit in one place | category: ai-api; semantic match | [.md](https://openaitools.app/tool/zerogpt.md) |
| 7 | [Claude](https://openaitools.app/tool/claude-2) | 1,253,439,413 | +23.8% | Freemium | Anthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing. | category: ai-api | [.md](https://openaitools.app/tool/claude-2.md) |
| 8 | [Crazyrouter](https://openaitools.app/tool/crazyrouter) | 77,144 | +1.8% | Paid | One API key, hundreds of AI models behind a single endpoint | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/crazyrouter.md) |
| 9 | [DeepSeek](https://openaitools.app/tool/deepseek) | 372,761,591 | +4.3% | Freemium | High-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs. | category: ai-api | [.md](https://openaitools.app/tool/deepseek.md) |
| 10 | [Groq](https://openaitools.app/tool/groq) | 3,987,936 | +10% | Paid | Ultra-fast AI inference on the LPU and LPX platform | category: ai-api; semantic match | [.md](https://openaitools.app/tool/groq.md) |
| 11 | [GPT Image 2 API (APIMart)](https://openaitools.app/tool/gpt-image-2api) | 383,148 | +6.3% | Paid, Contact for Pricing | A developer endpoint for OpenAI's GPT Image 2 model with 1K–4K output and pay-as-you-go pricing | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/gpt-image-2api.md) |
| 12 | [ToAPIs](https://openaitools.app/tool/toapis) | 14,757 | -51.4% | Free Trial, Paid | One OpenAI-compatible key for 200+ text, image and video models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/toapis.md) |
| 13 | [GPTOnline](https://openaitools.app/tool/chatgpt-online-gptonline-ai) | 32,047 | -48.6% | Free | Free AI chat with no signup, paired with ready-made writing tools, AI news and a tools directory. | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/chatgpt-online-gptonline-ai.md) |
| 14 | [Google AI Studio](https://openaitools.app/tool/google-ai-studio) | 112,620,020 | +2% | Freemium | Google's rapid prototyping IDE and developer API workbench for building multimodal applications with Gemini models. | category: ai-api | [.md](https://openaitools.app/tool/google-ai-studio.md) |
| 15 | [MacGPT](https://openaitools.app/tool/macgpt) | 26,224 | -7.5% | Freemium | ChatGPT in your Mac menu bar, inline and everywhere | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/macgpt.md) |
| 16 | [Chat01.ai](https://openaitools.app/tool/chat01-ai) | 122,748 | -15.4% | Freemium | Free, unlimited-feeling access to frontier ChatGPT-style models in your browser | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/chat01-ai.md) |
| 17 | [NoFilterGPT](https://openaitools.app/tool/nofiltergpt-com) | 87,497 | -4.7% | Freemium | Uncensored, anonymous AI chat with image and voice tools | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/nofiltergpt-com.md) |
| 18 | [APIMaster](https://openaitools.app/tool/apimaster) | 210,182 | +46.3% | Paid | One OpenAI-compatible key for discounted GPT, Claude and Gemini access | category: ai-api; keywords 100% | [.md](https://openaitools.app/tool/apimaster.md) |
| 19 | [GPTunneL](https://openaitools.app/tool/gptunnel) | 1,272,003 | +11.4% | Freemium, Pay-as-you-go | One subscription hub for 200+ AI models without a VPN | category: ai-api; semantic match | [.md](https://openaitools.app/tool/gptunnel.md) |
| 20 | [OrcaRouter](https://openaitools.app/tool/orcarouter) | 975,300 | -5.2% | Freemium | One OpenAI-compatible gateway for adaptive LLM routing, guardrails, and spend control | category: ai-api; semantic match | [.md](https://openaitools.app/tool/orcarouter.md) |
| 21 | [DeepL](https://openaitools.app/tool/deepl) | 95,110,871 | -1.7% | Freemium | Enterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages. | category: ai-api | [.md](https://openaitools.app/tool/deepl.md) |
| 22 | [OminiGate](https://openaitools.app/tool/ominigate) | 12,708 | -1.8% | Paid, Contact for Pricing | One key, one balance, and every major text, image, and video model behind a single OpenAI-compatible endpoint. | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/ominigate.md) |
| 23 | [Best API (Beat API)](https://openaitools.app/tool/beat-api) | 4,847 | -18% | Paid | One OpenAI-compatible endpoint for OpenAI, Claude and Gemini models | category: ai-api; keywords 100%; semantic match | [.md](https://openaitools.app/tool/beat-api.md) |
| 24 | [Gemini 4 Carbon (Gemini Carbon 4)](https://openaitools.app/tool/gemini-4-carbon) | 4,339,429 | +12.7% | Freemium | Google DeepMind's #1 frontier AI model (Gemini Carbon 4) for long-horizon agentic coding, cybersecurity defense, and 1M-token multimodal reasoning. | category: ai-api; keywords 100% | [.md](https://openaitools.app/tool/gemini-4-carbon.md) |

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Source: https://openaitools.app/?q=GPT%20API

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