kitio.aiClaude Platform vs Ultravox
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Claude Platform starts at See pricing page and Ultravox starts at $100/mo. 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
- Messages API
- Managed Agents
- Prompt caching
- Batch processing
- Workbench prompt testing
- Speech-native model
- Real-time voice agents
- Outbound call scheduler
- Custom voices
- SIP support
| Feature | Claude Platform | Ultravox |
|---|---|---|
| Best for | Anthropic's developer platform and API for building with Claude models | Speech-native voice AI platform for real-time voice agents |
| Category | Models & APIs | Models & APIs |
| Pricing model | Paid | Freemium |
| Starting price | See pricing page | $100/mo |
| Free plan | No | Yes |
| Made by | Anthropic | Ultravox (Inworld) |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Claude Platform starts at See pricing page and Ultravox starts at $100/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Claude Haiku 5.5
$0.10 / $0.50 per 1M tokens
- Input / output, prompts up to 100K
- Fastest, lowest-cost model
Claude Sonnet 5.5
$2 / $10 per 1M tokens
- Input / output
- Balanced speed and intelligence
Claude Opus 5.5
$4 / $20 per 1M tokens
- Input / output
- Advanced reasoning and coding
Claude Fable 5.1
$10 / $50 per 1M tokens
- Input / output
- Most capable model
3 plans
Pay as you go
$0.05 / minute
- 30 free minutes of calls
- Up to 5 concurrent calls
- Unlimited playground calls
Pro
$100/mo
- No hard concurrency caps
- Outbound call scheduler
- 5 custom voices
Enterprise
Custom
- Custom pricing
- Volume rates
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
Claude Platform
- Strong coding and agent models
- Prompt caching cuts costs
- Available on all major clouds
- Higher prices on flagship models
- No image generation models
- Rate limits tied to usage tiers
Ultravox
- Skips the speech-to-text step
- 30 free minutes to start
- Unlimited playground calls
- Developer-focused, not a no-code tool
- Pay-as-you-go plan limits concurrent calls to 5
- Now part of Inworld, so the roadmap may shift
Which one should you choose?
Choose Claude Platform if you want:
- Strong coding and agent models
- Prompt caching cuts costs
- Available on all major clouds
Watch out: higher prices on flagship models.
Choose Ultravox if you want:
- Skips the speech-to-text step
- 30 free minutes to start
- Unlimited playground calls
Watch out: developer-focused, not a no-code tool.
Claude Platform vs Ultravox FAQ
What is the difference between Claude Platform and Ultravox?
Claude Platform: Anthropic's developer platform and API for building with Claude models. Ultravox: Speech-native voice AI platform for real-time voice agents. Both are models & apis tools.
Is Claude Platform or Ultravox cheaper?
Claude Platform starts at See pricing page and Ultravox starts at $100/mo. Check both pricing pages for current plans.
Do Claude Platform and Ultravox have free plans?
Claude Platform: No. Ultravox: Yes.
Who makes Claude Platform?
Claude Platform is made by Anthropic, based in United States.
Who makes Ultravox?
Ultravox is made by Ultravox (Inworld), based in United States.
Which should I choose, Claude Platform or Ultravox?
Choose Claude Platform if you value strong coding and agent models and prompt caching cuts costs. Choose Ultravox if you value skips the speech-to-text step and 30 free minutes to start.