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Favicon for respan

Respan

Access 3 Respan models through the OpenRouter unified API including Span-01, Span-01 Lite, and Span-01 Lite (free). Compare pricing, context windows, benchmarks, and capabilities between different Respan models.

Respan tokens processed on OpenRouter

  • Favicon for respan
    Respan: Span-01Span-01
    4.92B tokens

    Span-01 is a behavior scoring model from Respan. It reads a conversation span and returns, for each plain-language behavior you define, the probability that the behavior is present. It is suited for evaluation, guardrails, and monitoring of LLM and agent outputs at scale. It is the higher-accuracy tier of the family. Span-01 Lite is the free, lighter tier.

    by respanSep 26, 2026$0.02/M input tokens$0/M output tokens
  • Favicon for respan
    Respan: Span-01 LiteSpan-01 Lite
    15.8B tokens

    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.

    by respanSep 26, 2026$0/M input tokens$0/M output tokens
  • Favicon for respan
    Respan: Span-01 Lite (free)Span-01 Lite (free)Free variant
    163M tokens

    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.

    by respanSep 26, 2026$0/M input tokens$0/M output tokens

Frequently asked questions

OpenRouter serves 3 Respan models behind one OpenAI-compatible API. Create an OpenRouter API key, point your client at https://openrouter.ai/api/v1, and set the model to an ID such as respan/span-01. The quickstart has request examples for every supported SDK.

Span-01 Lite and Span-01 Lite (free) are available at no cost through the OpenRouter API.

Span-01 is the most recently added Respan model on OpenRouter, listed on September 26, 2026.