Weights & Biases free tier includes ML experiment tracking, model registry, and LLM app tracing and evaluation (Weave)… Catalogue date August 2026. Compare with 1 alternatives in AI / ML.
Subtypes in AI / ML: experiment_tracking — records training or evaluation runs, their metrics and artifacts, and keeps a registry of model versions. We read that on 2026-09-01 from https://wandb.ai/site/, where it says: “Experiments Track and visualize your experiments” How we use this.
Weights & Biases's free tier offers ML experiment tracking, model registry, and LLM app tracing and evaluation (Weave)… We rate it stable. The one record we hold was our own error and has been withdrawn. Best for ai / ml workloads.
ML experiment tracking, model registry, and LLM app tracing and evaluation (Weave). W&B's hosted service is now sold as CoreWeave Forge. Its Free plan is $0/mo and designed for personal development, with up to 5 model seats, 5 GB/mo of storage and 1 GB/mo of Weave data ingestion. Pro starts at $60/month with a 30-day free trial and is for teams with fewer than 50 employees. Self-managed W&B Server needs a license; W&B's docs offer a free trial license, and CoreWeave's pricing page lists no free self-hosted plan.
We read that on 2026-11-03 from https://coreweave.com/forge-pricing, and our check recorded: the page names Weights & Biases as "weights biases" and states "$0" and "$60" and "5 GB/mo" and "1 GB/mo". A source check reads the cited page for the service's name and a price; the limits above are from our own record.
Free Designed for personal development of AI applications and models $0/mo Get started Features includes: AI application evaluations AI application tracing AI application scorers AI model experiment tracking AI assets registry & lineage tracking Community Support
How Weights & Biases compares against every one of the 1 we list, not against a selection of them. A surface with room for every member of a tied set may rotate their order. A surface with room for only some of them names none of them, because which ones it named would be the claim, and a claim seeded on the date is not the one we serve tomorrow. How we decide this.
| Service | Free Tier | Stability |
|---|---|---|
| Weights & Biases | Free | stable |
| Comet ML | Free Comet makes Opik, for LLM and agent observability and evaluation, and an MLOps platform for ML experiment tracking. Opik is open source and free to self-host. |
stable |
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