# AI tools for “LLM Engineering”

1,370 matching tools; showing 24, ranked by relevance.

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 | [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; semantic match | [.md](https://openaitools.app/tool/deepseek.md) |
| 2 | [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; semantic match | [.md](https://openaitools.app/tool/openai.md) |
| 3 | [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 100% | [.md](https://openaitools.app/tool/chatgpt-4.md) |
| 4 | [Prompt Cowboy](https://openaitools.app/tool/prompt-cowboy) | 1,130,450 | -22.4% | Freemium | Turn lazy prompts into great ones and get more out of any large language model | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/prompt-cowboy.md) |
| 5 | [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 100% | [.md](https://openaitools.app/tool/google-ai-studio.md) |
| 6 | [Learn Prompting](https://openaitools.app/tool/learn-prompting) | 159,807 | -8.6% | Freemium, Free Trial, Contact for Pricing | Free open course for prompt engineering and AI security | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/learn-prompting.md) |
| 7 | [LiteLLM](https://openaitools.app/tool/litellm) | 576,967 | +7.9% | Freemium, Contact for Pricing | One open-source AI gateway for 100+ LLM providers | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/litellm.md) |
| 8 | [PromptLayer](https://openaitools.app/tool/promptlayer) | 85,899 | -4.6% | Free Trial, Contact for Pricing | The collaboration layer for AI engineering teams | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/promptlayer.md) |
| 9 | [Portkey](https://openaitools.app/tool/portkey-ai) | 195,650 | -9.4% | Freemium, Paid, Contact for Pricing | AI gateway, observability and guardrails for production LLM apps | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/portkey-ai.md) |
| 10 | [Maxim AI](https://openaitools.app/tool/maxim-ai) | 121,351 | +10% | Contact for Pricing, Free Open Source | Evaluate, monitor, and govern your AI applications in production | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/maxim-ai.md) |
| 11 | [The Full Stack (fullstackdeeplearning.com)](https://openaitools.app/tool/fullstackdeeplearning-com) | 46,082 | +6.6% | Free (educational content) | Courses and best practices for building AI-powered products end to end | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/fullstackdeeplearning-com.md) |
| 12 | [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 100% | [.md](https://openaitools.app/tool/claude-2.md) |
| 13 | [ApX Machine Learning](https://openaitools.app/tool/apx-machine-learning) | 252,389 | -6.5% | Freemium | VRAM, throughput and GPU cost calculators plus courses for open-weight LLM deployment | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/apx-machine-learning.md) |
| 14 | [Google Gemini](https://openaitools.app/tool/gemini-gemini-advanced) | 2,637,398,242 | -0.1% | Freemium | Google's multimodal AI assistant powered by Gemini 4 Carbon (Gemini Carbon 4), Gemini 4 Argon, and Gemini 3.8 Flash with a 1M-token context window and Workspace integration. | category: ai-models, large-language-models-llms | [.md](https://openaitools.app/tool/gemini-gemini-advanced.md) |
| 15 | [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; semantic match | [.md](https://openaitools.app/tool/ollama.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 100% | [.md](https://openaitools.app/tool/outlier-ai.md) |
| 17 | [Latitude](https://openaitools.app/tool/latitude) | 48,210 | -30.6% | Freemium, Open Source, Enterprise | Open-source observability that finds your AI agent's failures — and fixes them | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/latitude.md) |
| 18 | [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 100% | [.md](https://openaitools.app/tool/datacamp-com.md) |
| 19 | [Not Diamond](https://openaitools.app/tool/not-diamond) | 29,244 | +25.3% | Freemium, Paid, Contact for Pricing | Intelligent model routing for coding agents | category: ai-models, large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/not-diamond.md) |
| 20 | [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; semantic match | [.md](https://openaitools.app/tool/gemma-open-models-by-google.md) |
| 21 | [Aleph Alpha](https://openaitools.app/tool/aleph-alpha-com) | 175,069 | +338.4% | Contact for Pricing | Aleph Alpha is a European AI company building sovereign large language models and AI solutions for enterprises, governments and regulated industries, with a focus on keeping control of data, models and deployment inside | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/aleph-alpha-com.md) |
| 22 | [Respan](https://openaitools.app/tool/respan) | 91,503 | -14.5% | Freemium | Open-source AI gateway with observability and evals built in | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/respan.md) |
| 23 | [LangWatch](https://openaitools.app/tool/langwatch) | 52,098 | +73% | Contact for Pricing | Agent observability, evals and governance for AI platform teams | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/langwatch.md) |
| 24 | [AlphaCorp AI](https://openaitools.app/tool/alphacorp-ai) | 38,657 | +108.4% | Contact for Pricing | AI agent development studio for production-grade systems | category: large-language-models-llms; keywords 100%; semantic match | [.md](https://openaitools.app/tool/alphacorp-ai.md) |

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

More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)