Anthropic API Alternatives

12 curated alternatives to Anthropic API in ai api. Compare features, pricing, and ratings to find the right tool for your workflow.

You are comparing against

Anthropic API

Claude models via API

Paid

Best Anthropic API Alternatives in 2026

ChatGPT

Conversational AI by OpenAI

Freemium12.4K

Claude

AI assistant by Anthropic

Freemium9.8K

Google Gemini

Multimodal AI by Google

Freemium7.6K

OpenAI API

GPT models via API

Paid8.2K

Groq

Ultra-fast LLM inference

Freemium3.8K

Together AI

Open-source model hosting at scale

Paid2.4K

OpenRouter

One API for all LLMs

Paid2.9K

Replicate

Run ML models with one API

Paid3.4K

Fireworks AI

Fast fine-tuned model inference

Paid1.6K

Ollama

Run LLMs locally on your machine

Open Source6.2K

DeepSeek API

Cost-effective open-source LLM API

Paid3.2K

Mistral API

European LLM API platform

Paid1.8K

Frequently asked questions

What is the best free Anthropic API alternative?

ChatGPT, Claude, Google Gemini offer free plans that work well as Anthropic API alternatives.

Is there an open-source alternative to Anthropic API?

Yes, Ollama are open-source alternatives worth considering.

How do these alternatives compare in pricing?

Each tool card above shows its pricing model (free, freemium, paid, or open-source). Click through for detailed pricing information and feature comparisons.

Want to compare Anthropic API side-by-side?

Use our head-to-head comparison tool to stack any two tools against each other.

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