AI Gateway adds unified fast mode support

Vercel's AI Gateway has launched a unified fast mode abstraction in beta, allowing users to request lower-latency or higher-throughput serving for any supported model by setting speed to 'fast' under providerOptions.gateway, with automatic fallback to standard speed when unavailable. Fast mode trades higher per-token cost for performance and is accessible via a 'speed' option or direct fast slugs like 'anthropic/claude-opus-5-fast', with support for a growing set of models marked by a lightning bolt in the models list.

AI Gateway has a unified fast mode abstraction, now in beta. You can now request fast mode https://vercel.com/docs/ai-gateway/models-and-providers/fast-mode the same way for every model on AI Gateway. Set speed to fast , and the gateway serves the fast tier when it's available and falls back to standard speed when it isn't. Fast mode trades a higher per-token cost for lower latency or higher throughput. You get it wherever it is available, without pinning a provider or wiring anything up yourself. Set speed to fast under providerOptions.gateway to upgrade the model to its fast serving path when one is routable: You can also address a fast variant directly with its fast slug, such as anthropic/claude-opus-5-fast , which is the same as setting speed: 'fast' on the base model. Use the speed option when you want to stay on the base model ID and fall back to standard speed. Use a fast slug when you want to name the fast variant directly, for example in a gateway.models fallback list. The speed option works across every AI Gateway API format. Fast mode is available for a growing set of models. Find them in the models list https://vercel.com/ai-gateway/models?features=fast with a lightning bolt next to the slug. Requesting fast mode on a model with no fast tier has no effect, and the request runs at standard speed. Fast variants of models are usually more expensive than the base model: check pricing https://vercel.com/ai-gateway/models?features=fast for more details. In Claude Code, toggle fast mode with /fast for Anthropic Opus models after setup https://vercel.com/docs/ai-gateway/coding-agents/claude-code enabling-fast-mode . For other agents, select a fast slug in your model configuration, such as anthropic/claude-opus-5-fast . For more information about fast mode, read the documentation https://vercel.com/docs/ai-gateway/models-and-providers/fast-mode .