# AI tools for “LLM Extensions”

902 matching tools; showing 24, ranked by relevance.

Filters: `group=coding-development`

Related categories: [ai-models](https://openaitools.app/category/ai-models.md), [large-language-models-llms](https://openaitools.app/category/large-language-models-llms.md)

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Why it matched | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/harpa-ai.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. | category: large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/chatgpt-4.md) |
| 3 | [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: large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/deepseek.md) |
| 4 | [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-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/openai.md) |
| 5 | [Mochii](https://openaitools.app/tool/mochii) | 26,988 | -20% | Freemium | One AI sidebar for ChatGPT, Claude and Gemini across the web | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/mochii.md) |
| 6 | [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-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/google-ai-studio.md) |
| 7 | [Qwen 4 (Alibaba Qwen4)](https://openaitools.app/tool/qwen-4) | 35,101,353 | -6.2% | Freemium | Alibaba Cloud's 4th-generation multimodal AI assistant and foundation model lineup (Qwen4-Max, Qwen4-Plus, Qwen4-Flash & open-weight Qwen4-27B) with 1M context. | category: ai-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/qwen-4.md) |
| 8 | [Merlin AI](https://openaitools.app/tool/merlin-ai) | 1,382,634 | +13.1% | Freemium | One-click AI assistant for browsing, writing and research | category: large-language-models-llms; keywords 100% | [.md](https://openaitools.app/tool/merlin-ai.md) |
| 9 | [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-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/openrouter-ai.md) |
| 10 | [Merlin AI](https://openaitools.app/tool/merlin-ai-plugins) | 1,382,634 | +13.1% | Freemium | One AI assistant that plugs ChatGPT, Claude and Gemini into every tab | category: large-language-models-llms; keywords 100% | [.md](https://openaitools.app/tool/merlin-ai-plugins.md) |
| 11 | [Open WebUI](https://openaitools.app/tool/open-webui) | 804,534 | -2.8% | Freemium | Self-hosted AI workspace for local and cloud models | category: large-language-models-llms; keywords 100% | [.md](https://openaitools.app/tool/open-webui.md) |
| 12 | [Ollama](https://openaitools.app/tool/ollama) | 9,421,973 | +4.3% | Free, Freemium, Paid | Run and build with open AI models locally or in the cloud | category: large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/ollama.md) |
| 13 | [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. | keywords 64% | [.md](https://openaitools.app/tool/claude-2.md) |
| 14 | [Gemma Open Models by Google](https://openaitools.app/tool/gemma-open-models-by-google) | 4,900,914 | -13.5% | Freemium, Paid | Google's family of lightweight, open-weight AI models | category: ai-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/gemma-open-models-by-google.md) |
| 15 | [BigModel](https://openaitools.app/tool/bigmodel) | 5,700,686 | -17% | Freemium | Zhipu AI's open platform for GLM large models, multimodal APIs, and agent building | category: ai-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/bigmodel.md) |
| 16 | [Outlier AI](https://openaitools.app/tool/outlier-ai) | 10,372,036 | +7.6% | Paid | Get paid to train the next generation of AI models | category: large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/outlier-ai.md) |
| 17 | [MiniMax Image-01](https://openaitools.app/tool/minimax-image-01) | 5,253,734 | -13.2% | Contact for Pricing | MiniMax's open-weight model for turning prompts into images | category: ai-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/minimax-image-01.md) |
| 18 | [Mammouth](https://openaitools.app/tool/mammouth) | 2,449,134 | +10.4% | Paid | Access many leading AI models through one subscription | category: ai-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/mammouth.md) |
| 19 | [ChatHub](https://openaitools.app/tool/chathub) | 322,618 | -13.9% | Freemium | Compare GPT, Claude, and Gemini answers side by side in one chat | category: large-language-models-llms; keywords 100% | [.md](https://openaitools.app/tool/chathub.md) |
| 20 | [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-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/gemini-4-carbon.md) |
| 21 | [DataCamp](https://openaitools.app/tool/datacamp-com) | 6,237,230 | -0.4% | Freemium | Interactive courses for data science, AI and analytics skills | category: large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/datacamp-com.md) |
| 22 | [Aymo AI](https://openaitools.app/tool/aymo-ai) | 268,974 | +113.3% | Freemium | Every leading AI model in one secure team workspace | category: large-language-models-llms; keywords 100% | [.md](https://openaitools.app/tool/aymo-ai.md) |
| 23 | [WritingMate.ai](https://openaitools.app/tool/writingmate-ai) | 109,629 | +8.5% | Freemium | One subscription that puts 350+ leading AI models, image tools, and video tools in a single chat | category: ai-models, large-language-models-llms; keywords 100% | [.md](https://openaitools.app/tool/writingmate-ai.md) |
| 24 | [ModelScope](https://openaitools.app/tool/modelscope-community) | 3,085,423 | +5.1% | Free | Open-source model and dataset hub with one-click online demos | category: ai-models, large-language-models-llms; keywords 64% | [.md](https://openaitools.app/tool/modelscope-community.md) |

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Source: https://openaitools.app/?q=LLM%20Extensions

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