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A rust powered token-aware rate limiter for FastAPI

12 starsPython

Rustgate – Bypassing Python's event loop for token-aware rate limiting

by MordechaiHadad·Jun 2, 2026·4 points·1 comment

AI Analysis

MidShip It

Rust-powered token counting for FastAPI, but rate limiting is a solved problem.

Strengths
  • tiktoken-rs integration counts actual tokens, not just request frequency
  • Model-specific cost factors (gpt-5 costs 25x gpt-4) reflect real pricing
Weaknesses
  • Standard sliding window rate limiting with Redis, nothing architecturally novel
  • Only supports gpt-4 and gpt-5 families, no provider abstraction layer
Target Audience

Backend developers building AI APIs with FastAPI

Similar To

axum-rate-limiter · slowapi · AI gateway tools

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