Every AI stack has a frontier.
Most teams have never seen it.
Our partners
Own the cost-quality frontier across your entire stack
Intelligent Gateway
Drop-in endpoint that reduces token waste based on your agent traffic, not just per-token pricing.
Harness Optimizer
Surfaces the best harness configuration by searching against your own private evals.
Post-Training
AI21 tunes small open models to match frontier quality on your workloads – at a fraction of the price.
Enabling organizations to scale their AI agents at every stage.
Research
Frontier quality,
30% of the cost
By combining cheap OSS models and frontier models via intelligent routing, budget-aware execution strategies in the harness, and custom trained validators, we keep pushing the cost-quality frontier even higher.
Research notes
