kitio.aiOpenAI API vs Gemini Enterprise Agent Platform
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 Gemini Enterprise Agent Platform starts at See pricing page. Check both pricing pages for current plans.
Google Cloud's platform for models and agents, formerly Vertex AI
PaidAt 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
- Model Garden
- Fine-tuning and evaluation
- Search grounding
- Agent hosting
- Enterprise security controls
| Feature | OpenAI API | Gemini Enterprise Agent Platform |
|---|---|---|
| Best for | Developer API for GPT, reasoning, image, audio and embedding models | Google Cloud's platform for models and agents, formerly Vertex AI |
| Category | Models & APIs | Models & APIs |
| Pricing model | Paid | Paid |
| Starting price | See pricing page | See pricing page |
| Free plan | No | No |
| Made by | OpenAI | |
| 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 Gemini Enterprise Agent Platform 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
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
Gemini Enterprise Agent Platform
- Many models under one bill
- Deep Google Cloud integration
- Strong governance tools
- Complex for small teams
- Renamed services confuse docs
- Pricing spread across many SKUs
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 Gemini Enterprise Agent Platform if you want:
- Many models under one bill
- Deep Google Cloud integration
- Strong governance tools
Watch out: complex for small teams.
OpenAI API vs Gemini Enterprise Agent Platform FAQ
What is the difference between OpenAI API and Gemini Enterprise Agent Platform?
OpenAI API: Developer API for GPT, reasoning, image, audio and embedding models. Gemini Enterprise Agent Platform: Google Cloud's platform for models and agents, formerly Vertex AI. Both are models & apis tools.
Is OpenAI API or Gemini Enterprise Agent Platform cheaper?
OpenAI API starts at See pricing page and Gemini Enterprise Agent Platform starts at See pricing page. Check both pricing pages for current plans.
Do OpenAI API and Gemini Enterprise Agent Platform have free plans?
OpenAI API: No. Gemini Enterprise Agent Platform: No.
Who makes OpenAI API?
OpenAI API is made by OpenAI, based in United States.
Who makes Gemini Enterprise Agent Platform?
Gemini Enterprise Agent Platform is made by Google, based in United States.
Which should I choose, OpenAI API or Gemini Enterprise Agent Platform?
Choose OpenAI API if you value wide model range in one api and mature sdks and docs. Choose Gemini Enterprise Agent Platform if you value many models under one bill and deep google cloud integration.