Is Opik free for LLM observability & evals?

Yes, Free Cloud costs nothing up to 25k traces, with 25k traces included.

How much does Opik cost for LLM observability & evals?

Opik Cloud is free for 25k spans a month; Pro is $19 per month with 100k spans, then $5 per 100k spans. At list prices: traces 10k traces: $0/month (Free Cloud); traces 100k traces: $19/month (Pro Cloud); traces 5M traces: $264/month (Pro Cloud).

Opik pricing

How Opik charges, what to know before you commit, and what you'd pay at your usage — next to what the alternatives would cost for the same thing.

How it charges

Checked 2026-10-03 on www.comet.com ↗ · USD, list prices

In short

Opik Cloud is free for 25k spans a month; Pro is $19 per month with 100k spans, then $5 per 100k spans.

Free plan: Yes
Cheapest paid plan: $19/mo
Side project: $0/mo Free Cloud
Growing: $19/mo Pro Cloud
Scaling: $264/mo Pro Cloud

What the model leaves out

Opik prices by spans (treated as traces here; a trace usually has several spans). Pro overage is $5 per 100k spans. Free allows up to 10 team members and Pro up to 50. The Apache-licensed version is free to self-host (hosting costs are yours).

Before you commit

Opik bills spans, and each tracked operation (a model request, a function call, an agent action) is a span.
Data is kept 60 days; extending retention to 400 days costs $29 per 100k spans.
Free allows up to 10 team members and Pro up to 50.