kitio.aiOpenAI API vs ComfyOnline
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 ComfyOnline 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
- Serverless ComfyUI
- Automatic workflow APIs
- Per-second GPU billing
- Choice of GPU types
- Hosted video and image models
- Private models and LoRAs
| Feature | OpenAI API | ComfyOnline |
|---|---|---|
| Best for | Developer API for GPT, reasoning, image, audio and embedding models | Serverless cloud for running ComfyUI workflows and APIs |
| Category | Models & APIs | Models & APIs |
| Pricing model | Paid | Paid |
| Starting price | See pricing page | See pricing page |
| Free plan | No | No |
| Made by | OpenAI | ComfyOnline |
| Based in | 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 ComfyOnline 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
4 plans
Pay-as-you-go
From $10 credit packs
- Runs on RTX 4090 by default
- Billed per second of runtime
- Private models and LoRAs
Personal
$17.5/mo billed yearly
- Unlimited relax-mode queue
Startups
$70/mo billed yearly
- Monthly credit allowance
- Custom deployments
- Wider GPU choice incl. H100
Business
$700/mo billed yearly
- Large monthly credit allowance
- Custom features
- Everything in Startups
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
ComfyOnline
- No idle GPU costs
- Workflows become APIs quickly
- Access to many commercial models
- Credit rates differ by GPU and are hard to estimate
- H100 access needs the Startups plan
- Only useful for ComfyUI users
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 ComfyOnline if you want:
- No idle GPU costs
- Workflows become APIs quickly
- Access to many commercial models
Watch out: credit rates differ by gpu and are hard to estimate.
OpenAI API vs ComfyOnline FAQ
What is the difference between OpenAI API and ComfyOnline?
OpenAI API: Developer API for GPT, reasoning, image, audio and embedding models. ComfyOnline: Serverless cloud for running ComfyUI workflows and APIs. Both are models & apis tools.
Is OpenAI API or ComfyOnline cheaper?
OpenAI API starts at See pricing page and ComfyOnline starts at See pricing page. Check both pricing pages for current plans.
Do OpenAI API and ComfyOnline have free plans?
OpenAI API: No. ComfyOnline: No.
Who makes OpenAI API?
OpenAI API is made by OpenAI, based in United States.
Who makes ComfyOnline?
ComfyOnline is made by ComfyOnline.
Which should I choose, OpenAI API or ComfyOnline?
Choose OpenAI API if you value wide model range in one api and mature sdks and docs. Choose ComfyOnline if you value no idle gpu costs and workflows become apis quickly.