Available in the API since Oct 27, 2026
Fireworks AI announced API availability for this model on 2026-10-27. Serverless
This date applies to API availability. Rollouts in consumer products or other hosting routes can happen on different dates.
- Hosting route
- First-party API
- Affected scope
- Serverless
- Announced
- Oct 27, 2026
- First seen by ModelClock
- Oct 28, 2026
What the provider published
docs.fireworks.ai ↗ New model on Serverless: Rune 26B-A4B
Rune 26B-A4B is now available on Serverless. It’s a System One decision model, so it doesn’t reason and doesn’t generate text. You send a document and up to 256 typed questions about it, and it returns a calibrated probability for each answer from a single read. Questions can be multiple choice, true/false, or a graded scale. Output tokens are always zero, so you’re billed for input only. Call
accounts/fireworks/models/runethrough the System One decisions API or the OpenAI-compatible Decisions API . It accepts text only, up to 262K context. Rates are on Serverless pricing .
Read from the provider's text; the quote is the provider's exact lines.
