NOW IN BETA
Cut your token bill by up to 40%. Leave your quality intact.
AI21 Gateway is a drop-in endpoint that automatically reduces token cost and waste, without sacrificing frontier quality.
Tuned to your agent for maximum savings
The AI21 Gateway delivered a 68% cost reduction on an autonomous code review agent by learning its unique cost profile.
AI21 Gateway trims, routes and transforms your agent traffic
Per-agent tuning
Builds every agent’s cost profile from its own traffic, not generic heuristics.
Adaptive routing
Picks the right model per turn based on task difficulty, context length & cache size.
Context compaction
Trims and restructures redundant context, including prompts, tool schemas & outputs
Trajectory-aware savings
Makes savings decisions in light of the whole run, not just single agent calls.
Caching
Modifies context to increase cache reads, and sets the right duration for your agent’s traffic.
Benchmark-validated quality
Runs changes against multiple coding benchmarks to ensure quality is preserved.
Get started in seconds
Simply point your agent’s URL at the gateway and start saving money. Compatible with wherever you build – Claude Code, Codex, LangChain or any self-controlled harness. The Gateway sits between your models and harness, so your stack doesn’t change.
Actionable insights that keep improving your agents
AI21 Gateway surfaces recommendations and expected savings for you to approve, so no changes hit production without your say.
Your data is protected.
AI21 is committed to the highest international privacy and security regulations. Securing your organization’s data and adhering to compliance requirements is top of mind.
FAQs
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Long-horizon agents resend a growing context on every turn — think prompt, cache, and tool schemas — so you end up paying repeatedly for tokens that add nothing. The AI21 Gateway cuts what you don’t need to pay for and keeps what protects quality.
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We continuously validate the Gateway’s savings recommendations against multiple coding benchmarks to confirm they preserve task performance, so savings don’t come at the cost of correctness.
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Yes. AI21 Gateway is a drop-in endpoint, so it works with popular off-the-shelf agents like Claude Code and Codex, frameworks like LangChain, and your own custom agents, without any need to rewrite your code. Just point your agent’s API base URL at the AI21 Gateway to get started.
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A standard AI cost savings tool examines a single prompt in isolation and tries to make it cheaper through techniques like token compaction or routing. But that can backfire. For example, switching to a cheaper-per-token model on the 10th turn, when the cache contains 40K tokens, can actually raise cost. A trajectory-aware gateway looks at the agent’s whole run, including how context has grown, what’s already been cached and the run’s heaviest token expenses, before making savings recommendations.
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No code changes to the agent. Integration is a single one-line change: swap your API base URL to point at the gateway endpoint. From there it sits in the call path and starts building the agent’s cost profile from live traffic.
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AI21 Gateaway is free to use during the beta preview. For additional enterprise features, such as shared workspace access, send us a message.
Get started in seconds
Simply point your agent’s URL at the gateway and start saving money. Compatible with wherever you build – Claude Code, Codex, LangChain or any self-controlled harness. The Gateway sits between your models and harness, so your stack doesn’t change.