Respan

The only AI router with built-in observability & evals on every call. Smarter routing, cheaper models, lower $$. Creator of Span-01.

[Respan @RespanAI]

Introducing Span-02: anytime reasoning for decisions.

Reasoning models make you pick an effort level and wait. Span-02 takes a deadline and always returns its best decision so far.

It gets better the longer it thinks. With reasoning off, it beats Jev at 1/4 of the price, and runs at 1/3 the latency of decision models at its level.

It can:
- Answer with numbers and scores, not just probabilities and choices
- See images and screens (multimodal)
- Take a configurable reasoning time

And it’s fully open weight!

[jinjingliang @JinjingLiang]

Shoutout to other open source project!

[Respan @RespanAI]

Write a plugin: a guardrail, a smart router, custom billing. It's the same Rust API our own features are built on, and good ones get merged into the main repo.

Try it out, and give us a star if you like it: https://t.co/7CNut8FQmB

[Respan @RespanAI]

Respan OSS Gateway: the last AI gateway you ever need.

Because it can connect anything: LLMs, images, video, realtime voice, and MCP tools like web search and long-term memory, all through one endpoint. Each one is just a plugin you switch on.

Against LiteLLM on the same machine:
- 0.08 ms vs 5.9 ms added latency (78x less)
- 61,062 vs 1,348 requests/s with 50 in flight (45x more; LiteLLM on 14 workers)
- 33 MB vs 494 MB memory (15x less; LiteLLM on 1 worker)

Fully written in Rust. MIT/Apache-2.0.

[Respan @RespanAI]

Routing and fallbacks are also plugins:

[https://t.co/WxfSFwHYIW]
to = ["anthropic/claude-haiku-5-5", "openai/gpt-6-luna"]
tries = 2

Claude gets two tries, then it falls back to GPT.

[Respan @RespanAI]

Write a plugin: a guardrail, a smart router, custom billing. It's the same Rust API our own features are built on, and good ones get merged into the main repo.

Try it out, and give us a star if you like it: https://t.co/7CNut8FQmB

[Respan @RespanAI]

Routing and fallbacks are also plugins:

[https://t.co/WxfSFwHYIW]
to = ["anthropic/claude-haiku-5-5", "openai/gpt-6-luna"]
tries = 2

Claude gets two tries, then it falls back to GPT.

[Respan @RespanAI]

Write a plugin: a guardrail, a smart router, custom billing. It's the same Rust API our own features are built on, and good ones get merged into the main repo.

Try it out, and give us a star if you like it: https://t.co/7CNut8FQmB

[Respan @RespanAI]

Routing and fallbacks are also plugins:

[https://t.co/WxfSFwHYIW]
to = ["anthropic/claude-haiku-5-5", "openai/gpt-6-luna"]
tries = 2

Claude gets two tries, then it falls back to GPT.

[Respan @RespanAI]

https://t.co/sjcRvmI2Xe

[Respan @RespanAI]

Introducing weekly LLM discounts on the Respan Gateway.

Every Monday, we’ll drop a new set of deals that last the entire week.

This week, 7 models are at least 50% off, including GPT-6.1 Sol and new models from DeepSeek, Gemini, and Meta.

Try them out👇

Follow us to catch new deals every Monday!