kitio.aiOpenAI API vs OpenRouter
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. OpenAI API starts at See pricing page and OpenRouter starts at See pricing page. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Responses API
- Agents SDK
- Realtime voice API
- Image and audio models
- Batch API
- Fine-tuning and evals
- Unified OpenAI-compatible API
- Automatic provider fallback
- Free model variants
- Bring your own key
- Usage rankings
| Feature | OpenAI API | OpenRouter |
|---|---|---|
| Best for | Developer API for GPT, reasoning, image, audio and embedding models | One API and key for hundreds of models from dozens of providers |
| Category | Models & APIs | Models & APIs |
| Pricing model | Paid | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | No | Yes |
| Made by | OpenAI | OpenRouter |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
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Pricing compared
OpenAI API starts at See pricing page and OpenRouter starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
GPT-6 Luna
$0.10 / $0.50 per 1M tokens
- Input / output
- Fast, low-cost model
- 1.05M context
GPT-6.1 Sol
$2 / $10 per 1M tokens
- Input / output
- Balanced model
- 1.05M context
GPT-6 Astra
$10 / $50 per 1M tokens
- Input / output
- Most capable model
- 1.05M context
3 plans
Free
Free
- Free models with rate limits
- One API for many models
Pay-as-you-go
Per-token model pricing
- Buy credits
- Pay provider rates per model
Enterprise
Contact sales
- Volume pricing
- Dedicated support
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
OpenAI API
- Wide model range in one API
- Mature SDKs and docs
- Built-in tools like web search
- Top models are costly at scale
- Rate limits depend on spend tier
- Model names change frequently
OpenRouter
- Huge model choice with one key
- Easy model switching
- Built-in failover
- Small fee on credit purchases
- Provider quality varies
- Adds a middle layer for data
Which one should you choose?
Choose OpenAI API if you want:
- Wide model range in one API
- Mature SDKs and docs
- Built-in tools like web search
Watch out: top models are costly at scale.
Choose OpenRouter if you want:
- Huge model choice with one key
- Easy model switching
- Built-in failover
Watch out: small fee on credit purchases.
OpenAI API vs OpenRouter FAQ
What is the difference between OpenAI API and OpenRouter?
OpenAI API: Developer API for GPT, reasoning, image, audio and embedding models. OpenRouter: One API and key for hundreds of models from dozens of providers. Both are models & apis tools.
Is OpenAI API or OpenRouter cheaper?
OpenAI API starts at See pricing page and OpenRouter starts at See pricing page. Check both pricing pages for current plans.
Do OpenAI API and OpenRouter have free plans?
OpenAI API: No. OpenRouter: Yes.
Who makes OpenAI API?
OpenAI API is made by OpenAI, based in United States.
Who makes OpenRouter?
OpenRouter is made by OpenRouter, based in United States.
Which should I choose, OpenAI API or OpenRouter?
Choose OpenAI API if you value wide model range in one api and mature sdks and docs. Choose OpenRouter if you value huge model choice with one key and easy model switching.