Best OpenAI-compatible inference APIs: drop-in alternatives for 2026

Jul 23, 2026 · 1:02 PM UTC ·4 min read · 0 reactions · 0 comments · 13 views

#ai #cloud #inference #api #pricing #DigitalOcean #Fireworks AI #Groq #Nebius Token Factory #OpenAI #Anthropic #Llama

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The article reviews several providers offering OpenAI-compatible inference APIs, highlighting their model support, pricing, and performance. DigitalOcean, Fireworks AI, Groq, and Nebius Token Factory each present distinct trade‑offs in endpoint coverage, speed, and feature completeness. The analysis helps users choose a drop‑in alternative based on cost, latency, and compatibility needs.

Key facts

▪DigitalOcean provides a single endpoint that serves both open‑weight and closed models, matching owner token rates and achieving 230 tokens per second on DeepSeek V3.2.
▪Fireworks AI supports open models, automatically adjusts max‑tokens to fit context windows, and records the highest throughput at 651.8 tokens per second on GPT‑OSS‑120B.
▪Groq runs models on a custom LPU chip, lacks certain OpenAI features such as logprobs, and delivers 482.1 tokens per second on GPT‑OSS‑120B.
▪Nebius Token Factory offers over 60 open models with a fast variant that uses speculative decoding, providing the lowest price for Llama 3.3 70B among the surveyed providers.

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Publication time	2026-07-23T13:02:00.000Z
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Provider details Providers appear in the same alphabetical order as the table. DigitalOcean Inference Engine (Serverless Inference) DigitalOcean’s Serverless Inference gives you a single OpenAI-compatible endpoint (https://inference.do-ai.run/v1/) that serves both open-weight models (Llama, Mistral, DeepSeek, GPT-OSS) and closed models from OpenAI and Anthropic, making it one of the few providers where a base-URL swap gets you Claude and GPT-class models alongside open ones, per DigitalOcean’s documentation.

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