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Opper supports 300+ models from every major provider through one gateway and key. Browse the full, always-current catalog — with pricing, context windows, capabilities, and EU-hosted models marked — at opper.ai/models.

Browse all models

The complete model catalog. Copy a model id to use it from the SDK or any drop-in client.
Call any model by its provider-prefixed name (openai/gpt-5.5, anthropic/claude-sonnet-4-6, gemini/gemini-2.5-pro) from any SDK. See Drop-in SDKs.

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Multimodal models

Beyond text, the catalog includes models that accept images, audio, and video, and models that generate images, speech, and video. Filter the catalog by capability — vision, audio, video, image gen — to see what each model supports. For the modality-specific endpoints, a discovery call returns the usable models and their capabilities at runtime, so you don’t have to hardcode a list:
EndpointModels for
GET /v3/images/modelsImage generation (POST /v3/images)
GET /v3/audio/modelsSpeech & transcription (POST /v3/audio/speech, /v3/audio/transcriptions)
GET /v3/videos/modelsVideo generation (POST /v3/videos)
For sending images and PDFs into a text model, see Vision & PDFs.

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Aliases and backup chains

An alias is a stable name you define in the platform that maps to an ordered list of models — a primary plus fallbacks. Call the alias name like any other model, and the gateway tries the first model in the list, falling through to the next if one is unavailable or errors. That ordered list is the backup chain. 
production/main  →  anthropic/claude-sonnet-4-6   (primary)
                →  openai/gpt-5.5                 (fallback)
                →  mistral/mistral-large          (last resort, EU-hosted)
Two things this buys you:
  • Resilience. If the primary provider is down or rate-limited, the call automatically continues down the chain instead of failing.
  • Swap models without touching code. Point your app at production/main, then reorder or repoint the chain in the platform — no deploy.
Set aliases in the platform under Settings → Models. The gateway resolves them on every call (a built-in model name still wins; an alias is used when you call its name). To pin your own provider deployments into a chain, register them as custom models first.

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What’s next

Custom models

Register your own model deployments and API keys, plus aliases.

Integrations

Use Opper as the provider for your editor, agent, or CLI.