Using Span-02 on OpenRouter

Implementation guide · Span · Respan

Serverless
Open Source

OpenRouter exposes Span-02 through model ID respan/span-02. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-10-20. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at OpenRouter and generate an API key.
  2. 2
    Use the OpenRouter SDK or REST API to call respan/span-02 — see the documentation for request format.
  3. 3
    You'll be billed $0.01/1M input, Free/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$0.01
Output tokensFree

Capabilities

VisionMultimodalReasoningStructured Outputs

About Span-02

Span-02 is Respan's open-weight decision model, a fine-tune of Google's Gemma 4 26B-A4B with about 4B active parameters. Given text and up to four images, it returns a typed answer: a choice, yes/no/unknown, a score on a scale, or a number. It uses anytime reasoning: reasoning can be off, set to a time budget after which it returns its best decision so far, or chosen per request in auto mode. Context is 131,072 tokens per question. Weights ship in NVFP4/FP8 with Respan's own Rust/CUDA engine for one NVIDIA Blackwell GPU; Respan also serves it through OpenRouter.

Full model details →

Model Specs

Released2026-10-15
Parameters26B
Context128K
ArchitectureMixture of Experts

Provider

OpenRouter

OpenRouter, Inc.

New York, NY, USA