CometAPI vs Rivet.dev

SpecialistGoogle's rapid prototyping IDE and developer API workbench for building multimodal applications with Gemini models.

Industry-leading model router with transparent pricing and broad provider support, but lacks Comet's specific bundled discounts.

SpecialistExcels at serverless generation of media models like images and video, but is less focused on general LLM routing.

SpecialistSpecializes in high-performance serverless inference for open-source models, but offers fewer proprietary commercial model options.

Offers unified access to multimodal language and media models, but focuses more heavily on generation infrastructure.

Free / Open-sourceOpen-source proxy and SDK that standardizes multi-provider LLM calls, but requires self-hosting or manual infrastructure setup.

Free / Open-sourceThe TypeScript framework for building, deploying, and observing AI agents

One API for LLM, image, video, and audio models in production

SpecialistProvides optimized inference for open-weight models behind a unified API, though with different regional pricing structures.

Provides a similar OpenAI-compatible multi-model gateway with automatic failover, though with a different model lineup.

Aggregates hundreds of foundation models and agent tools into a single endpoint, but has different rate limits.

The low-cost cloud sandbox where AI agents actually live