Comet vs OpenAI Pricing (2026)
How do these two stack up on price? Here's what each one costs, what you get, and where the value sits.
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 GPT-5.5 Instant
- Limited messages and uploads
- Limited and slower image generation
- Limited deep research
- Limited memory and context
- Limited Codex access
Go
- More access to GPT-5.5 Instant
- More messages
- More uploads
- More image creation
- Longer memory
Plus
- Advanced reasoning with GPT-5.5 Thinking
- More complex and accurate image creation
- Expanded deep research and agent mode
- Expanded memory and context
- Projects, tasks, and custom GPTs
- Expanded Codex usage
- Early access to new features
Pro
- 5x or 20x more usage
- Pro reasoning with GPT-5.5 Pro
- Maximum Codex tasks
- Unlimited GPT-5.3 and file uploads
- Unlimited and faster image creation
- Maximum deep research and agent mode
- Maximum memory and context
- Expanded projects, tasks, and custom GPTs
- Research preview of new features
Comet vs OpenAI FAQ
- Which one is cheaper?
- OpenAI is the cheaper option, starting at $8/mo vs $19/mo for Comet.
- 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?
- Different approach here. Comet uses usage-based pricing, while OpenAI goes with flat-rate. That changes the math depending on your team size and usage.
- 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. OpenAI: Plus at $20 is now the de facto industry benchmark — it's what Anthropic's Claude and Google's Gemini Advanced both price-match against. Pro at $100 is a premium signal, positioning OpenAI as the high-end option for serious users willing to pay for best-in-class model access, while the Go tier is an interesting move to compete downmarket against free-tier alternatives.
Still deciding? See the best Comet alternatives or the best OpenAI alternatives, ranked with verified pricing.
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We'll monitor pricing changes for Comet and OpenAI and let you know when something moves.