OpenAI API vs Together AI: Which is Better in 2026?
Choosing between OpenAI API and Together AI? Both are popular llm provider tools. Below we compare them on pricing, free tiers, features, and pros & cons so you can pick the right fit for your stack.
Quick verdict
Together AI is the safer pick if budget matters — it has a free tier, while OpenAI API does not. Choose OpenAI API when its specific features justify the cost. In our catalog, OpenAI API rates slightly higher (4.8 vs 4.5 out of 5).
OpenAI API vs Together AI — Side by Side
| OpenAI API | Together AI | |
|---|---|---|
| Category | LLM Provider | LLM Provider |
| Pricing | Usage-based | Free |
| Starting price | Pay-as-you-go | Free tier available |
| Free tier | — | |
| Rating | 4.8 | 4.5 |
| Best for | LLM Provider — llm, ai | LLM Provider — ai, api |
Pros & Cons
- Largest LLM ecosystem
- Widest range of models
- Extensive SDK support
- Most community resources
- Usage cost at scale
- Data privacy concerns for some use cases
- Rate limits without tier upgrade
- Huge open-model catalog (200+)
- Cheapest at scale
- One API for many models
- Fine-tuning support
- Free is credits (not permanent)
- Open models only
Key Features Compared
OpenAI API
- GPT-4o (multimodal, fast)
- o1 / o3-mini (reasoning models)
- GPT-4-turbo (128K context)
- Embeddings (text-embedding-3)
- Vision & image input
- Function calling & tool use
Together AI
- $25 free credits
- 200+ open-source models
- Serverless inference + fine-tuning
- OpenAI-compatible API
Choose OpenAI API if…
- Largest LLM ecosystem
- Widest range of models
- Extensive SDK support
Choose Together AI if…
- You want to start free — Together AI has a free tier and OpenAI API does not.
- Huge open-model catalog (200+)
- Cheapest at scale
- One API for many models
Frequently Asked Questions
Is OpenAI API better than Together AI?⌄
Together AI is the safer pick if budget matters — it has a free tier, while OpenAI API does not. Choose OpenAI API when its specific features justify the cost. In our catalog, OpenAI API rates slightly higher (4.8 vs 4.5 out of 5).
What is the difference between OpenAI API and Together AI?⌄
OpenAI API — OpenAI's API providing access to GPT-4o, o1, and other frontier models for text, code, images, and embeddings. Together AI — Serverless inference and fine-tuning for 200+ open-source models — the price leader at scale, with $25 free credits. Both are llm provider tools; the comparison table above breaks down pricing, free tiers, and what each is best for.
OpenAI API vs Together AI: which is cheaper?⌄
OpenAI API pricing: Usage-based. Together AI pricing: Free. Confirm current pricing on each tool's official site, as plans change.
Which is rated higher, OpenAI API or Together AI?⌄
In our catalog, OpenAI API rates 4.8 out of 5 and Together AI rates 4.5 out of 5, so OpenAI API has a slight edge on reviews.
See more options in our guide to the best llm provider tools for startups.
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