# opencode 1.17.18: Copilot zero-batch-size crash fix

> Fixes crashes and incorrect pricing data when GitHub Copilot returns models with a zero billing batch size. Also adds a model-specific system prompt for Meta Muse Spark.

| | |
|---|---|
| **Tool** | opencode |
| **Version** | v1.17.18 |
| **Kind** | release |
| **Published** | 2026-07-09 |
| **Observed** | 2026-08-11 |
| **Significance** | 2/5 |
| **Breaking** | no |
| **Categories** | fix, model-support |

## What changed


- No longer crashes or records bad pricing when GitHub Copilot reports a zero billing batch size for a model.
- Model-specific system prompt added for Meta Muse Spark.


## Sources

- [github_release](https://github.com/anomalyco/opencode/releases/tag/v1.17.18) — retrieved 2026-08-11

## Community

_No curated reactions recorded. Facts and community takes are kept in separate layers
and never blended._

---
Canonical: https://changelogs.info/opencode/v1-17-18
Entity: https://changelogs.info/opencode
Event ID: `evt_2026-07-09_opencode_v1-17-18`
Licence: event synthesis © changelogs.info, CC BY 4.0. Linked sources belong to their vendors.