Both serve the genuine model
This is the part worth saying plainly: routing through Brievio is not a downgrade of the model. You get the real Claude, Gemini, GPT-Image and Veo — full context window, native tools, vision and prompt caching intact — sourced first-hand over tier-1 cloud channels and traceable to AWS Bedrock and Google Vertex. The difference between Brievio and going direct is the plumbing around the model (one endpoint, one bill, honest counts, a small discount), not the model itself.
When going direct is the right call
Going direct wins when you live on a single provider and don't need cross-vendor routing; when you need day-one access to a model the moment it ships; or when procurement, compliance or an enterprise SLA must be a contract with the provider itself. None of that is a knock on gateways — it's just the source-of-truth path, and for some teams that relationship is the requirement.
When Brievio earns its place
Brievio earns its place the moment you run more than one provider in production. One OpenAI-compatible endpoint, one key and one bill cover Claude, Gemini and top image and video — no per-provider SDKs, accounts or invoices to wrangle. You pay about 15% under each provider's official list on honest token counts, failed 4xx/5xx calls cost nothing, and traffic hot-fails across vendors so a wobbling upstream becomes a reroute instead of an outage. You get all of that without trading away authenticity — it is the genuine first-party model either way.
The honest verdict
One provider, or a contract that has to be with the provider? Go direct. More than one provider in production, and you want unification plus a real discount without gray-market risk? Use Brievio — because it routes the genuine model either way, the only thing you give up by going through it is the per-provider sprawl. Both directions are one base_url edit, so it costs almost nothing to try the gateway side and keep the parts that pay off.