ContinuityBench: stateful LLM failover keeps 99.2% context vs near-0% stateless
its_vayishu · x · 2026-09-19
The arXiv paper 'ContinuityBench: A Benchmark and Systems Study of Stateful Failover in Multi-Provider LLM Routing' shows high API availability doesn't equal conversational continuity: stateless failover keeps uptime but silently discards history.
- Introduces two metrics: Continuity Preservation Rate (CPR) and Continuity Latency Overhead (CLO)
- Proposes a stateful multi-provider proxy with a History-Forwarding strategy to rebuild conversational state across heterogeneous endpoints
- Releases open-source continuity-bench harness for stress-testing context preservation under concurrent provider failures
- Across 750 failover events, the stateful proxy hit 99.20% CPR vs near-0% for stateless architectures
- Latency analysis shows asynchronous exponential backoff with jitter is critical to avoid cascading retry storms
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