Are there any model hosting platforms that handle high throughput and automatic fallback routing?

Yes. A few model hosting / API gateway platforms support high throughput plus automatic fallback or routing across models/providers.

Options to look at

• OpenRouter

  • Acts as a unified API across many model providers.
  • Supports routing/fallback behavior depending on model availability and configuration.
  • Good if you want multi-provider access with one endpoint.

• AWS Bedrock

  • Managed access to multiple foundation models.
  • You can build fallback logic with AWS-native tooling; Bedrock itself is strong for scale and reliability.
  • Best if you’re already on AWS and need enterprise controls.

• Google Vertex AI

  • High-throughput managed inference.
  • Can be paired with custom routing logic through load balancing / orchestration.
  • Strong for production-scale deployments.

• Azure AI Foundry / Azure OpenAI

  • High availability and enterprise-grade throughput.
  • Fallback routing is typically something you implement in your app or API layer.

• Together.ai

  • High-throughput inference for open models.
  • Useful for large traffic workloads; routing/fallback can be handled with their API or your own gateway logic.

• GroqCloud

  • Very fast inference and high throughput for supported models.
  • Fallback across models/providers is usually external to the platform.

• Fireworks AI

  • Focused on fast inference and production usage.
  • Good for high volume; fallback routing usually needs to be built above it.

If you specifically want automatic fallback routing

The most relevant are usually:

1. OpenRouter — simplest multi-model routing layer
2. A custom gateway in front of providers like Bedrock / Vertex / Azure / Together / Fireworks
3. Managed inference + your own failover logic using retries, circuit breakers, and provider priority lists

What to compare

Look for:

• Multi-region deployment
• Rate-limit handling
• Provider failover
• Model fallback by latency/error
• Streaming support
• SLA / uptime
• Request queueing and burst handling

If you want, I can also give you:

• a shortlist by use case (cheapest, fastest, enterprise, easiest fallback),
• or a recommended architecture for automatic failover across multiple model providers.