Code · Vendor site 2026-10-04
Phoenix is Arize’s open-source platform for LLM and agent observability, tracing, and evaluation. Teams can run Phoenix locally or self-host in their environment, while optional Arize AX Cloud offers a hosted path to start free without a credit card.
Understand the total cost
Free
Free
Open-source Phoenix can be run locally with uvx; AX Cloud offers a free start with no credit card required per the Phoenix page.
No retained pricing changes yet. A current price alone does not establish a historical trend.
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Yes. Phoenix LLM Tracing has an ongoing free plan. Open-source Phoenix can be run locally with uvx; AX Cloud offers a free start with no credit card required per the Phoenix page.
Phoenix LLM Tracing is listed as free. No paid plan with a published price was found.
API or developer access is mentioned. Documentation and SDK integrations for tracing and evaluation are linked from the Phoenix product page and docs.