Comet vs Gemini API Pricing (2026)
How do these two stack up on price? Here's what each one costs, what you get, and where the value sits.
| Comet | Gemini API | |
|---|---|---|
| Starts at | $19/mo | Custom |
| Number of plans | 4 | 3 |
| Free plan | ||
| Free trial | — | |
| Pricing model | usage-based | usage-based |
Open Source
- Full AI observability & agent testing feature set
- True OSS: same codebase as the hosted versions
- Agent tracing & analysis
- Test Suites & assertions
- Agent Playground
Free Cloud
- Up to 10 team members
- 25k spans per month
- 60-day data retention
- Agent tracing & analysis
- Test Suites & assertions
- Agent Playground
- Ollie coding harness trial
Pro Cloud
Popular- Up to 50 team members
- 100k spans per month
- 60-day data retention
- Customizable monthly span limits
- Customizable data retention periods
Enterprise
- Unlimited team members
- Custom usage plans
- Flexible deployments
- Service accounts and view-only users
- Single sign-on
- Dedicated support and SLAs
- SOC 2, ISO 27001, ISO 9001, HIPAA, and GDPR compliance
Free
- Limited access to certain models
- Free input & output tokens
- Google AI Studio access
- Content used to improve our products
Paid
Popular- Higher rate limits for production deployments
- Access to Context caching
- Batch API (50% cost reduction)
- Access to Google's most advanced models
- Content not used to improve our products
Enterprise
- Dedicated support channels
- Advanced security & compliance
- Provisioned throughput
- Volume-based discounts (based on usage)
- ML ops, model garden and more
Comet vs Gemini API FAQ
- Which one is cheaper?
- One or both use custom pricing, so it depends on your specific needs.
- Can I use either one for free?
- Both offer free plans, so you can try each without paying. Start with whichever fits your workflow better and upgrade when you hit the limits.
- How do they charge?
- Both use a usage-based model, so the comparison is straightforward — it comes down to features and limits at each price point.
- Which one is a better deal?
- Depends on what you need. Comet: At $19/mo entry, they're positioning as the accessible alternative to heavier MLOps platforms — clearly going after teams that find tools like Weights & Biases or Arize too expensive or too complex for pure LLM tracing use cases. The academic free Pro tier signals they're also playing a long game on developer mindshare. Gemini API: Google is playing the volume game here, positioning against OpenAI's API and Anthropic by offering competitive per-token rates with the added leverage of deep GCP integration. They're not the cheapest, but they're gunning for teams already in the Google ecosystem who want one throat to choke.
Still deciding? See the best Comet alternatives or the best Gemini API alternatives, ranked with verified pricing.
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We'll monitor pricing changes for Comet and Gemini API and let you know when something moves.