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Alternatives · LLM APIs and model providers

Best Anthropic API alternatives

Rankings as of

The Anthropic API serves Claude models for chat, tool use, and long context. Use it when the product should call Claude, or when you are already building with Claude Code and want the same model family in production. Billing is usage-based. Rates: check site.

Anthropic API scores 8.3 in LLM APIs and model providers (The model behind the feature). The 5 alternatives below are the other tools in that job, ordered by their StackPick score. How we score.

Initial editorial estimate. Not a measured benchmark. Affiliate links may be used to monetize, but they never affect scores or rankings, and rankings are never sponsored.

Some links may earn us a commission. It never changes scores or order.

The tool

Anthropic API

Claude models via API. The pair to Claude Code.

8.3

Visit

Best for Calling Claude from your own product

Ranked alternatives

  1. 01

    OpenAI API

    Pick this if The model API most libraries already speak

    The default model API. GPT models, tools, and a platform console.

    Usage-based

    8.0

    Visit

  2. 02

    OpenRouter

    Pick this if Switching models without switching SDKs

    One API key for many models, including labs and open weights.

    Usage-based

    7.9

    Visit

  3. 03

    Groq

    Pick this if Low-latency calls to open models

    Fast inference API for open models.

    Usage-based

    7.7

    Visit

  4. 04

    Gemini API

    Pick this if A capable model API with a free starting quota

    Google's Gemini models, with a free tier that moves.

    Usage-based

    7.6

    Visit

  5. 05

    Mistral

    Pick this if A European model API, or open weights you can host

    European model lab with an API and open-weight releases.

    Usage-based

    6.7

    Visit