OneOver vs Respan (formerly Keywords AI)

OneOver is a creative studio that puts multi-model chat, image generation, video, voice, and music in one browser workspace. You can run GPT, Claude, Gemini, Grok, and dozens of other models in a single thread, attach PDFs and images, flip on web search, and swap models without losing context. Guests get five chat messages before signup, and new accounts receive 50 one-time starter credits.

Where most tools make you pick one provider and buy separate subscriptions for images or video, OneOver routes everything through one shared credit balance. Subscription refills, plan bonuses, and pay-as-you-go packs all spend across chat, diffusion, video, speech, music, and playground mini apps. Switching from GPT-5.4 Nano to Claude Opus 5 is a dropdown change in the same conversation, not a copy-paste hop between sites.

Creators and marketers use OneOver to draft copy, iterate visuals, and turn prompts or photos into short clips from one library. Developers can hit the same model routes through a REST API with streaming support. Pro and Studio also ship seat-based team plans that pool monthly credits with member soft limits and one invoice.

Respan is an LLM engineering platform for teams shipping production AI agents and applications. Route model traffic through one gateway, trace every call in detail, run evals on offline datasets and live traffic, and monitor cost, latency, and errors from a single dashboard.

The product grew out of Keywords AI, a Y Combinator Winter 2024 company founded by engineers from the University of Illinois. What started as LLM routing expanded into full observability after customers asked for visibility into how agents behaved in production. Respan now positions itself around the loop from tracing to evaluation to iteration.

It fits ML engineers, platform teams, and AI product builders who need gateway failover, prompt version testing, production quality scoring, and spend controls without stitching together separate tools. Customers cited on the site include teams at Retell AI, Mem0, Lovable, and Gumloop.