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Rune 26B-A4B

Ready
model path:accounts/fireworks/models/rune

Rune 26B-A4B is a System One decision model: it does not reason and does not generate text. It reads a document once and answers up to 256 typed questions about it - multiple choice, true/false probability, or graded scale - returning calibrated probabilities in that single pass. Output tokens are always zero, so you pay for input only. 262K context, text only.

Rune 26B-A4B API Features

Serverless

Docs

Rune 26B-A4B is available via Fireworks' serverless API, where you pay per token. There are several ways to call the Fireworks API, including Fireworks' Python client, the REST API, or OpenAI's Python client.

On-demand Deployment

Docs

On-demand deployments allow you to use Rune 26B-A4B on dedicated GPUs with Fireworks' high-performance serving stack with high reliability and no rate limits.

Available Serverless

$0.042 / $0.008 / $0.00

Run queries immediately, pay only for usage

Per 1M Tokens (input/cached input/output)

Metadata

State
Ready
Created on
20 OCT, 2026
Kind
Base model
Provider
Fireworks

Specifications

Calibrated
No
Mixture-of-Experts
Yes
Parameters
26.5B

Supporting Functionality

Fine-tuning
Not Supported
Serverless
Supported
Context Length
262k tokens
Function Calling
Not Supported
Embeddings
Not Supported
Rerankers
Not Supported
Supporting image input
Not Supported