kitio.aiAdded Oct 28, 2026
Weights & Biases
Freemium · $60/moExperiment tracking and LLM observability, now part of CoreWeave
What is Weights & Biases?
Weights & Biases is a developer platform for tracking machine learning experiments, managing models and evaluating LLM apps with its Weave tool. It is used by AI labs and ML teams, and has been part of CoreWeave since 2025.
Weights & Biases is now part of CoreWeave and appears as a product inside CoreWeave Forge since September 30, 2026. Existing projects, runs and API keys still work.
Experiment tracking logs metrics, configs and artifacts from training runs, with dashboards, sweeps for hyperparameter search and reports. Weave adds tracing, evaluations and guardrails for LLM and agent applications.
Since September 30, 2026, SaaS accounts sign in through CoreWeave Forge. There is a free plan, a Pro plan for small teams and Enterprise options including self-hosting.
Features
- Experiment tracking
- Hyperparameter sweeps
- Model registry
- Weave LLM tracing
- Reports
Tags
Releases
+ Submit new release- Listed
Weights & Biases was added to the directory.
Organization
CoreWeave
🇺🇸 United States
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Freemium
- Paid options from
- $60/mo
- Billing frequency
- Monthly
Weights & Biases plans
Free
Free
- Experiment tracking for individuals
- Limited storage
Pro
$60/mo
- Starting price
- Team collaboration features
- Higher usage limits
Enterprise
Contact sales
- SSO and advanced security
- Dedicated support
Prices in USD, checked Oct 28, 2026. Plans change often, so confirm on the Weights & Biases site.Official pricing
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Pros and cons
Pros
- Industry-standard experiment tracking
- Polished dashboards
- Covers training and LLM apps
Cons
- Pricing jumps for larger teams
- Weave ingestion billed by size
- Sign-in moved to CoreWeave
Prompts & results
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Q&A
What is Weights & Biases?
Weights & Biases is a developer platform for tracking machine learning experiments, managing models and evaluating LLM apps with its Weave tool. It is used by AI labs and ML teams, and has been part of CoreWeave since 2025.
How much does Weights & Biases cost?
Weights & Biases is freemium, with paid plans from $60/mo.
Is there a free version of Weights & Biases?
Yes. Weights & Biases has a free plan, and paid plans add more usage and features.
What are the main features of Weights & Biases?
Experiment tracking, Hyperparameter sweeps, Model registry, Weave LLM tracing, Reports.
Who makes Weights & Biases?
Weights & Biases is made by CoreWeave.
What are the best alternatives to Weights & Biases?
Popular alternatives include LangSmith, Langfuse, Arthur.