# ModelFusion vs Models.dev ModelFusion records 119 monthly visits with -88.2% month-over-month growth and Freemium pricing. Models.dev records 200,451 monthly visits with -3.9% growth and Free pricing. | Metric | [ModelFusion](https://openaitools.app/tool/modelfusion) | [Models.dev](https://openaitools.app/tool/models-dev) | | :--- | :--- | :--- | | Website URL | https://modelfusion.io | https://models.dev | | Categories | AI Models, Large Language Models (LLMs), AI Chatbot, AI Image Generator | AI Models, AI API, Open Source AI Models, AI Tools Directory | | Pricing Model | Freemium | Free | | Monthly Visits | 119 | 200,451 | | MoM Growth Rate | -88.2% | -3.9% | | Primary Market | Global | China | | Direct Visits | 51 | 136,316 | | Review Score | 4.2 | 4.4 | | Saved Count | 1 | 0 | | Supported Platforms | Website | Website | ## ModelFusion ModelFusion is a toolkit aimed at people who work with many large language models at once and want to make better cost and capability decisions. Its core is a set of free, browser-based utilities: an LLM cost calculator that estimates API spend across providers, a prompt tokenizer for counting tokens and trimming prompt length, a model selector quiz, a benchmark comparator using metrics like MMLU and HumanEval, a local LLM runner guide for Ollama and LM Studio, an open-source model directory and a glossary of AI terms. Beyond the calculators, ModelFusion also markets a product layer: MultiChat for comparing responses from multiple models side by side, document projects for chatting with uploaded PDFs and Word files, a unified API that presents one interface across providers, and usage analytics for tracking cost and performance. The site positions these as suitable for research, business, development and education audiences. Much of the toolkit is completely free and needs no registration, with the latest model pricing and benchmark data refreshed regularly. Because the underlying costs it reports come from third-party providers, users should still confirm current rates with OpenAI, Anthropic, Google or whichever vendor they rely on, as provider pricing changes often. **Pricing & Plans:** ModelFusion's calculators, prompt library and comparison tools are advertised as 100% free with no registration required. The platform also lists paid tiers (a Free Trial and Paid options) for its API and enterprise-style usage, so teams needing the unified API or dedicated support should check current plans on the site. - **LLM cost calculator:** Estimate API costs for GPT-4, Claude, Gemini and 25+ models and compare pricing across providers before you spend. - **Prompt library and tokenizer:** Access a large library of ready-made prompts and count tokens for any model to reduce cost and improve efficiency. - **Model selector and benchmark comparator:** Find the best model for a use case and compare MMLU, HumanEval and other performance metrics interactively. - **MultiChat and document projects:** Chat with several AI models at once for side-by-side comparison, and upload PDFs or Word files to query them with AI. - **Unified API and observability:** Use a single consistent interface across providers, with analytics for tracking usage, cost and performance. **Strengths:** Large collection of genuinely free utilities with no sign-up needed.; Useful for comparing pricing and benchmarks across many models in one place.; Covers practical extras like token counting and local model setup guides.; Includes a MultiChat view for comparing model answers directly. **Limitations:** Some tools are informational and model data can lag behind very fast-moving provider updates.; Cost figures are estimates based on third-party pricing and should be verified with each provider. [Profile (Markdown)](https://openaitools.app/tool/modelfusion.md) ## Models.dev Models.dev exists to answer a very practical developer question: which model should I use, and what will it cost? The site organises every entry under a canonical identifier in the form provider/model, so the same model served by several providers can be compared directly rather than guessed at. Columns cover context window, maximum output, whether input and output are supported, reasoning, tool calling, structured output, temperature control, open versus closed weights, price per million tokens, and release and update dates. Because model releases move fast, the catalogue is built to stay current, with sortable and searchable tables that let you scan by lab or provider and filter down to what matters. Entries include both closed flagship models and open-weight alternatives, making it useful for cost planning as well as capability research. The project is open source and free to use, and it is intended to be consumed programmatically. Developers can pull the catalogue into their own tooling through a JSON API or a type-safe SDK, which makes it a practical backend for dashboards, routing logic, or internal cost calculators rather than just a reference page to browse. **Pricing & Plans:** Models.dev is free and open source. It is a reference database, so the prices it lists are the per-million-token rates charged by the model providers themselves, not a fee for using the site. - **Canonical model identifiers:** Every model uses a consistent provider/model format so the same model across providers can be compared directly. - **Specification comparison:** Side-by-side context window, output limit, reasoning, tool calling, structured output, and temperature support. - **Pricing transparency:** Input and output prices per million tokens listed alongside release and update dates. - **Open and closed models:** Covers closed flagship APIs and open-weight models from many labs in one sortable catalogue. - **Developer access:** Consume the catalogue through a JSON API or a type-safe SDK for your own tools and dashboards. **Strengths:** Free and open source with no account required; Consistent canonical identifiers make cross-provider comparison reliable; Covers pricing, limits, and capabilities in one sortable table; Available as a JSON API and type-safe SDK for programmatic use **Limitations:** It is a reference catalogue, not an inference or hosting service; Data quality depends on community and maintainer updates keeping pace with releases; Interface is aimed at developers and offers little guidance for non-technical users [Profile (Markdown)](https://openaitools.app/tool/models-dev.md) ## Frequently Asked Questions ### How do ModelFusion and Models.dev compare in monthly traffic? ModelFusion has 119 monthly visits, while Models.dev has 200,451. Traffic estimates describe audience size, not product quality. ### How do their growth rates compare? ModelFusion has a month-over-month growth rate of -88.2%; Models.dev has -3.9%. ### How does pricing compare? ModelFusion: Freemium. ModelFusion's calculators, prompt library and comparison tools are advertised as 100% free with no registration required. The platform also lists paid tiers (a Free Trial and Paid options) for its API and enterprise-style usage, so teams needing the unified API or dedicated support should check current plans on the site. Models.dev: Free. Models.dev is free and open source. It is a reference database, so the prices it lists are the per-million-token rates charged by the model providers themselves, not a fee for using the site. ## Alternatives | # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 1 | [Code Arena](https://openaitools.app/tool/code-arena) | 35,827,928 | +19.4% | Free | Battle-test AI coding models side by side | [.md](https://openaitools.app/tool/code-arena.md) | | 2 | [Surge AI](https://openaitools.app/tool/surgehq-ai) | 245,142 | +6.6% | Contact for Pricing | Expert human data and evaluation for training frontier AI | [.md](https://openaitools.app/tool/surgehq-ai.md) | | 3 | [Stork](https://openaitools.app/tool/stork) | 201,544 | +2.3% | Free | Includes model pricing trackers and developer news alongside tools directories, but less focused on raw API specs. | [.md](https://openaitools.app/tool/stork.md) | | 4 | [AI for Work](https://openaitools.app/tool/ai-for-work) | 72,615 | -14.9% | Free | A free prompt library and AI workflow hub for professionals | [.md](https://openaitools.app/tool/ai-for-work.md) | | 5 | [InfraBase.ai](https://openaitools.app/tool/infrabase-ai) | 39,072 | -13.6% | Free | Catalogues and compares AI infrastructure tools and services across categories, but lacks deep per-token pricing tables. | [.md](https://openaitools.app/tool/infrabase-ai.md) | | 6 | [CalcForge](https://openaitools.app/tool/calcforge) | 31,360 | -4.8% | Free, Paid | Open-source engineering calculators for civil and structural design | [.md](https://openaitools.app/tool/calcforge.md) | | 7 | [PromptZone](https://openaitools.app/tool/promptzone) | 20,937 | +40% | Free | A free community and toolbox for prompt engineers and AI builders | [.md](https://openaitools.app/tool/promptzone.md) | | 8 | [Museum of Models (Rival)](https://openaitools.app/tool/rival) | 9,187 | -35% | Free | Archives how various AI models answer identical prompts over time, offering qualitative comparison rather than pricing. | [.md](https://openaitools.app/tool/rival.md) | | 9 | [LLM Price Check](https://openaitools.app/tool/llm-price-check) | 8,255 | -34.7% | Free | Tracks per-token API prices across major AI providers in a simple comparison table, but omits broader model specs. | [.md](https://openaitools.app/tool/llm-price-check.md) | | 10 | [OpenGPT](https://openaitools.app/tool/opengpt-com) | 3,559 | -24.7% | Freemium | Helps compare foundation model performance and AI stacks, but functions more as a decision workspace than raw database. | [.md](https://openaitools.app/tool/opengpt-com.md) | --- Source: https://openaitools.app/compare/modelfusion-vs-models-dev More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)