> ## Documentation Index > Fetch the complete documentation index at: https://docs.osvi.ai/llms.txt > Use this file to discover all available pages before exploring further. # Running Batches > Launch scenarios against your agent and prompt or model variants, and follow each run as it happens A **batch** runs one or more [scenarios](/platform/evals-scenarios) against the agent — and, optionally, against variants of it — so you can compare how each version handles the same conversations. Runs call the agent's **real tools**, just like a live conversation. See the note on [Test Agent Before You Deploy](/platform/evals) before running evals on an agent connected to production systems. ## Launching a batch Click **Run** on a scenario to test just that one, or **Launch batch** — next to **Conductor** above the scenario list — to run several: The Conductor button with its dropdown arrow, next to the Launch batch button The Conductor button with its dropdown arrow, next to the Launch batch button The launch dialog takes you through naming the batch and picking scenarios, then [variants](#variants) and [scoring fields](#scoring-fields). On launch the **Runs** tab opens: every selected scenario runs once against the current agent and once per variant, so three scenarios with two variants make nine runs. Runs use the agent's **saved** configuration at the moment you launch, so unsaved edits aren't included. ## Variants A variant is a what-if version of the agent, run alongside the current agent on the same scenarios. Each variant needs a label and must change the model or the prompt: * **Model & sampling** — a different provider, model, or temperature (0–1). * **Prompt** — a replacement system prompt. The box starts empty; use **Load from version history** to start from a saved version of the agent's prompt. For multi-prompt agents this replaces the global system prompt shared across states. You can add up to four variants per batch. Results for each are shown side by side — see [Comparing variants](/platform/evals-results#comparing-variants). ## Scoring fields Scoring fields are what the AI judge grades every run on, from 0 to 5. **Task completion**, **Instruction and persona adherence**, **Safety**, and **Conciseness** are available by default; you can rename them or **Add field** to create your own. At least one field must be enabled. Fields can be turned off but not deleted, and your selection is remembered for the next launch. ## Watching a batch run The Runs tab with a running batch of three guardrail scenarios: one completed, one simulating, one queued The Runs tab with a running batch of three guardrail scenarios: one completed, one simulating, one queued * **History** on the left lists the batches you've launched, with each one's status and progress (*1/3 done*). Click one to open it. * **The batch header** shows how many runs have completed and a **Stop** button while it's running. * **The runs table** has a row per run. **Status** shows where each run is — *queued*, *simulating · turn 1/16* while the conversation is in progress, then *scoring…* and *completed*. **Verdict** shows how the run ended, such as *user closed*. * **Results** says **Running and judging** with a count of scored runs until every run is scored, then fills in automatically — see [Reading Results](/platform/evals-results). ## Stopping and deleting Click **Stop** to cancel a batch — unfinished runs are cancelled, and a stopped batch doesn't produce results. Batches and runs can be deleted once they've finished.