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AI · alternatives · 2026

24 alternatives to Merlin Unified API

One unified API for all AI models like Gemini, GPT-4, DALL-E

Merlin Unified API provides a single integration point for accessing over 20 AI models including Gemini, GPT-4, and DALL-E through a standardized OpenAI-compatible format. Developers can stream responses without… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Merlin Unified API launched in 2023; newer entries below may have overtaken it.

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    Frontier AI intelligence, now at half the price

    29d ago · openai.com · its alternatives →

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    The easiest way to access frontier AI models.

    Aug 2026 · tokenharbor.ai · its alternatives →

  4. 4

    One API 100+ AI models

    2024 · aimlapi.com · its alternatives →

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    LLM Gatewayfree tier▲296

    I built an OpenAI-compatible LLM gateway that routes requests to OpenAI, Anthropic, Ollama, vLLM, llama-server, SGLang... anything that speaks /v1/chat/completions. Single Go binary, one YAML config file, no infrastructure. It does the things you'd expect from this kind of gateway... semantic routing via a three-layer cascade (keyword heuristics, embedding similarity, LLM classifier) that picks the best model when clients omit the model field, weighted round-robin load balancing across local inference servers with health checks and failover. The part I think is most…

    2025 · llmgateway.io · its alternatives →

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    Avoid OpenAI downtimes - one API for 30+ LLMs

    2023 · github.com · its alternatives →

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    Hey HN, We've been building a multi-model API for LLMs called OpenRouter since we launched the Window AI extension in April this year [0]. The events of the last week make it clear the LLM landscape is unpredictable, so LLM aggregators are picking up interest. Unlike others, we're making a router on top of a public, explorable dataset. We recently built a way to rank and visualize this data, including the token counts we see going to and from different models, both open-sourced (like Llama, Mistral, finetunes, and variants) and closed-sourced (OpenAI, Anthropic). The API supports - 50+…

    Apr 2026 · openrouter.ai · its alternatives →

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    Unified AI Access One API, All Models

    2025 · its alternatives →

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    Your all-access pass to top AI models — free & fast

    Nov 2025 · nx-relay.com · its alternatives →

  10. 10

    One OpenAI-compatible API for GPT, Claude, Gemini, Flux, Kling and 100+ models. Compare pricing, switch instantly, pay per token.

    Jul 2026 · velokey.ai · its alternatives →

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    Talk to multiple LLMs thru a unified API

    2025 · ai-gateway.dev · its alternatives →

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    OneMux▲10

    Low-cost, OpenAI-compatible API for multiple AI models

    Jul 2026 · onemux.net · its alternatives →

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    Henry, Matt and James here – we’re building an open source toolkit that makes it easy to integrate an LLM-powered copilot that talks to your API into software products. It works by calling API endpoints which you choose to expose to it. This lets the chatbot complete tasks within your software in response to natural language queries. It’s also open source, so you don’t have to send user data to another 3rd party. We support Llama 2, but we haven’t fine-tuned Llama 2 yet (coming soon) so highest accuracy is seen with GPT-4 or fine-tuned GPT-3.5 (much faster). We started working together 2…

    2023 · github.com · its alternatives →

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    One API Key. 45+ AI Models. 43x Cheaper Than OpenAI.

    Jun 2026 · its alternatives →

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    One API for every frontier model — GPT, Claude, Gemini

    Jul 2026 · ai-gateway.app · its alternatives →

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    'One Prompt, Every AI'

    Feb 2026 · chromewebstore.google.com · its alternatives →

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    One API for GPT, Claude, Gemini & every major AI model

    May 2026 · apilink.io · its alternatives →

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    Universal API bridge for Gemini, Claude, and Qwen clients.

    Jan 2026 · github.com · its alternatives →

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    A4F ▲6

    Access hundreds of LLMs through one API for Free

    2025 · a4f.co · its alternatives →

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    GyaniAI: Your Smart AI Companion for daily Assistance.

    2024 · play.google.com · its alternatives →

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    Cut your Claude and GPT API costs by up to 96%

    Jul 2026 · cheap-ai-apis.carrd.co · its alternatives →

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    Access leading Chinese AI models through one unified API

    Aug 2026 · easytoken.site · its alternatives →

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    The AI Compute Gateway - One API. Every AI Model. Contribute to radium0090/Compute-Gateway development by creating an account on GitHub.

    Aug 2026 · github.com · its alternatives →

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    Multiple AIs. One question. Smarter answers together.

    2025 · allaithink.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →