AI Gateway adds unified fast mode support

AI Gateway has a unified fast mode abstraction, now in beta.

You can now request the same way for every model on AI Gateway. Set speed to , and the gateway serves the fast tier when it's available and falls back to standard speed when it isn't.fast modefast

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 to under to upgrade the model to its fast serving path when one is routable:speedfastproviderOptions.gateway

You can also address a fast variant directly with its fast slug, such as , which is the same as setting on the base model.anthropic/claude-opus-5-fastspeed: 'fast'

Use the 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 fallback list. The option works across every AI Gateway API format.speedgateway.modelsspeed

Fast mode is available for a growing set of models. Find them in the 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 for more details.models listpricing

In Claude Code, toggle fast mode with for Anthropic Opus models after . For other agents, select a fast slug in your model configuration, such as ./fastanthropic/claude-opus-5-fastsetup

For more information about fast mode, read the .documentation

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Requesting fast mode

Using fast mode in coding agents