OpenAI
AI research company behind ChatGPT and the GPT model family, accessed through apps and an API.
Pricing FreemiumPaid from $20 a month for ChatGPT Plus; API pricing varies by modelOpen source noStars 11.2knpm a week 51M
Anthropic alternatives
10 tools you can use instead of Anthropic, ranked by live GitHub stars and npm downloads. OpenAI, OpenAI API and Ollama are the most used. Stats updated 5 hours ago.
OpenAI is the closest alternative, with ChatGPT and an API billed per token. Mistral AI and Cohere also offer their models through an API. To run open models yourself, compare Ollama and LM Studio, or Together AI for hosted open models.
When Anthropic is not a good fit
Anthropic is an AI company, set up as a public benefit corporation, that builds the Claude family of large language models. Developers use Claude through the Claude API, Amazon Bedrock or Google Cloud Vertex AI, and people use it through the Claude apps and Claude Code. As of September 2026 the current models are Claude Fable 5.1, Opus 5.5, Sonnet 5 and Haiku 4.5.
It is a weaker choice for:
- Running a model on your own hardware: Anthropic doesn't release open-weight models
- Image or video generation: Claude reads images but doesn't create them
- Fixed, predictable costs at high volume: API spend grows with tokens used
The alternatives
Most used first.
Anthropic vs OpenAI
OpenAI API
Pay-per-token API access to OpenAI's GPT models for building AI into your own applications.
Pricing Pay as you goPaid from $0.10 input / $0.50 output per million tokens on GPT-6 LunaOpen source noStars 11.2knpm a week 51M
Ollama
Run open source AI models locally, with an optional hosted cloud and Pro plan.
Pricing FreemiumPaid from $20 a month for the Pro plan, including $60 of usage credit for cloud modelsOpen source yesStars 182knpm a week 896k
Hugging Face
Hub for open source AI models, datasets and demo apps, plus paid hosting for inference and Spaces.
Pricing FreemiumPaid from $9 a month for a PRO accountOpen source yesStars 167knpm a week 441k
Mistral AI
French AI company building open-weight and proprietary language models, accessed via API or Le Chat.
Pricing Pay as you goPaid from $5.99 a month for Le Chat Pro (student pricing), $14.99 a month standardOpen source nonpm a week 9.4M
Replicate
Run and deploy machine learning models in the cloud through a simple API, billed by the second.
Pricing Pay as you goPaid from about $0.000025 a second for small CPU instances, varying by model and hardwareOpen source noStars 598npm a week 705k
Cohere
Enterprise-focused AI company offering language, embedding and rerank models through an API.
Pricing Pay as you goPaid from $0.30 input / $0.60 output per million tokens on Command-light; current flagship Command A models are priced on requestOpen source nonpm a week 556k
Together AI
Cloud platform for running and fine-tuning open source AI models, with serverless inference and GPU clusters.
Pricing Pay as you goPaid from $0.09 per million input tokens (lowest-cost serverless models)Open source nonpm a week 120k
LM Studio
Desktop app for downloading and running open-weight language models locally, with a chat UI and local API.
Pricing FreemiumOpen source nonpm a week 68.6k
Perplexity AI
AI-powered answer engine that searches the web and cites sources, with a free tier and paid Pro/Max plans.
Pricing FreemiumPaid from About $20 a month (Pro plan)Open source no
Anthropic and its alternatives, side by side
| Tool | Pricing | Free plan | Paid from | Open source | GitHub stars |
|---|---|---|---|---|---|
| Anthropic | Pay as you go | Yes, in the Claude apps. The API is billed per token. | $20 a month for Claude Pro; API from $1 per million input tokens (Haiku 4.5) | No | 2.1k |
| OpenAI | Freemium | Yes, in ChatGPT. The API has no free plan and is billed per token. | $20 a month for ChatGPT Plus; API pricing varies by model | No | 11.2k |
| OpenAI API | Pay as you go | No, the API has no free tier and is billed per token from the first request | $0.10 input / $0.50 output per million tokens on GPT-6 Luna | No | 11.2k |
| Ollama | Freemium | Yes, running models locally is always free | $20 a month for the Pro plan, including $60 of usage credit for cloud models | Yes, MIT | 182k |
| Hugging Face | Freemium | Yes: unlimited public model, dataset and Space hosting, free CPU and limited ZeroGPU compute | $9 a month for a PRO account | Yes, Open source libraries (e.g. Transformers) are Apache-2.0; hosted models and datasets carry their own individual licenses | 167k |
| Mistral AI | Pay as you go | Yes, in Le Chat, with limited usage and $10 a month in API credits | $5.99 a month for Le Chat Pro (student pricing), $14.99 a month standard | No | None |
| Replicate | Pay as you go | No ongoing free plan; billing is pay-as-you-go with no monthly minimum | about $0.000025 a second for small CPU instances, varying by model and hardware | No | 598 |
| Cohere | Pay as you go | Yes: evaluation API keys are free but limited in usage | $0.30 input / $0.60 output per million tokens on Command-light; current flagship Command A models are priced on request | No | None |
| Together AI | Pay as you go | Limited free credits are typically available for new accounts to try the platform | $0.09 per million input tokens (lowest-cost serverless models) | No | None |
| LM Studio | Freemium | Yes, the core app and running local models is free | Not listed | No | None |
| Perplexity AI | Freemium | Yes: free tier available with standard search and limited access to advanced features | About $20 a month (Pro plan) | No | None |
Pricing facts come from each tool's official pricing page, with the checked date on the tool's own page.
Questions
What is the most popular alternative to Anthropic?
By GitHub stars, OpenAI is the most used alternative to Anthropic listed on ScratchDB, with 11.2k stars.
Which Anthropic alternatives are open source?
Ollama and Hugging Face are open source.
Which Anthropic alternatives have a free plan?
OpenAI, Ollama, Hugging Face, Mistral AI, Cohere, LM Studio and Perplexity AI have a free plan. The table on this page shows what each one includes.