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Respan: Span-01 Lite (free)

respan/span-01-lite:free

Span-01 Lite is the free, lighter tier of Span-01, a behavior scoring model from Respan. It returns, for each plain-language behavior you define, the probability that the behavior is present in a conversation span, and is suited for high-volume evaluation and monitoring where cost matters more than peak accuracy.

Modalities
Price
Free
Released
Sep 26, 2026

Playground

Providers

This model is hosted by one provider. OpenRouter forwards every request without routing.

Performance

Latency is how long it takes to return the full response (lower is better).

Latency
0.79s

P50, best provider

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)The model was reachable. Request routed to a provider.
99.99%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
99.99%

Availability over the last 3 days

Last 72 hours
Availability 99.99%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.97%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

1.
Favicon for https://llm-gateway.local/
LLM Gateway
new
20.6Mtokens
2.
Favicon for https://trajectoire.ai/
hermes-structured-aux
new
10.8Mtokens
3.
Favicon for https://pm.jablazr.com/
polymarket-bot
new
7.91Mtokens
4.
Favicon for https://atlas.goriv.co/
Atlas Mining
new
6.6Mtokens
5.
Favicon for https://s.qln.kr/
Five-letter domain daily ensemble
new
5.04Mtokens
Rest of OpenRouter
1.08M
Top 5 Apps
0

Activity

Token volume and request traffic to this model over time.

API

Drop-in code to call this model. It runs on the OpenRouter Decisions API rather than the OpenAI-compatible chat endpoint, so the request and response shapes below are specific to structured decisions — chat completions SDKs will not work with it.

Not currently available through EU in-region routing. In-region routing docs

Documentation

Guides, cookbooks, blog posts, and tools for building with Respan: Span-01 Lite (free) on OpenRouter.

Frequently asked questions

Explore more models