LLM API Providers Comparison
Compare the leading LLM API providers on available models, pricing, speed, rate limits, and developer experience.
Feature Comparison Matrix
| Tool | Top Models | Speed (Tokens/s) | Context Window | Pricing (Input) | Pricing (Output) | Rate Limits | Fine-Tuning | Free Tier | Pricing |
|---|---|---|---|---|---|---|---|---|---|
| OpenAI | GPT-4o, o3, o4-mini | 80-100 | 128K | $2.50/1M | $10/1M | Tier-based | Yes | Yes (Limited) | Pay-per-token |
| Anthropic | Claude Opus 4, Sonnet 4 | 70-90 | 200K | $3/1M | $15/1M | Tier-based | No | Yes ($5 credit) | Pay-per-token |
| Google (Gemini) | Gemini 2.5 Pro, Flash | 80-120 | 1M+ | $1.25/1M | $5/1M | Generous | Yes | Yes (Generous) | Pay-per-token |
| Groq | Llama 3, Mixtral | 500-800 | 128K | $0.05/1M | $0.08/1M | Limited | No | Yes | Pay-per-token |
| Together AI | Llama 3, Mixtral, DBRX | 100-200 | 32K-128K | $0.20/1M | $0.60/1M | Flexible | Yes | Yes ($5 credit) | Pay-per-token |
| AWS Bedrock | Claude, Llama, Titan | 60-90 | 200K | Varies by model | Varies by model | Scalable | Yes | AWS Free Tier | Pay-per-token |
Best For
Our Verdict
OpenAI remains the most widely adopted API. Anthropic offers the best reasoning capabilities. Google Gemini provides the best value with massive context windows. Groq delivers unmatched inference speed for open-source models. Together AI offers the widest open-source model selection.
Frequently Asked Questions
Which LLM API is cheapest?
Groq offers the lowest per-token pricing for inference on open-source models. Google Gemini offers the best value among frontier models with competitive pricing and a generous free tier.
Which LLM API is fastest?
Groq is the fastest LLM API provider, delivering 500-800 tokens per second using their custom LPU hardware. This is 5-10x faster than most other providers.
Can I use multiple LLM APIs in one app?
Yes, many developers use multiple providers for different tasks (e.g., Claude for reasoning, Groq for speed). Tools like LiteLLM and OpenRouter provide unified interfaces for multiple providers.
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