# Get Model Registry > Returns all models and endpoints supported by the Helicone AI Gateway `GET /v1/public/model-registry/models` This endpoint returns the complete catalog of AI models and provider endpoints that the Helicone AI Gateway can route to. The gateway uses this registry to determine which providers support a requested model and how to intelligently route requests for maximum reliability and cost optimization. When you request a model through the AI Gateway (like `gpt-4o-mini`), the gateway consults this registry to find all providers offering that model, then applies routing logic to select the best provider based on your configuration, availability, and pricing. ## OpenAPI ````yaml swagger.json get /v1/public/model-registry/models openapi: 3.0.0 info: title: helicone-api version: 1.0.0 license: name: MIT contact: {} servers: - url: https://api.helicone.ai/ - url: http://localhost:8585/ paths: /v1/public/model-registry/models: get: operationId: GetModelRegistry responses: "200": description: Complete model registry with models and filter options content: application/json: schema: $ref: "#/components/schemas/Result_ModelRegistryResponse.string_" examples: Example 1: value: models: - id: claude-opus-4-1 name: "Anthropic: Claude Opus 4.1" author: anthropic contextLength: 200000 endpoints: - provider: anthropic providerSlug: anthropic supportsPtb: true pricing: prompt: 15 completion: 75 cacheRead: 1.5 cacheWrite: 18.75 maxOutput: 32000 trainingDate: 2025-08-05 description: Most capable Claude model with extended context inputModalities: - null outputModalities: - null supportedParameters: - null - null - null - null - null - null - null total: 150 filters: providers: - name: anthropic displayName: Anthropic - name: openai displayName: OpenAI - name: google displayName: Google authors: - anthropic - openai - google - meta capabilities: - audio - image - thinking - caching - reasoning description: Get all available models from the registry summary: Returns a comprehensive list of all AI models with their configurations, pricing, and capabilities tags: - Model Registry security: [] parameters: [] components: schemas: ResultError_string_: properties: data: type: number enum: - null nullable: true error: type: string required: - data - error type: object additionalProperties: false ModelProviderName: type: string enum: - baseten - anthropic - azure - bedrock - canopywave - cerebras - chutes - deepinfra - deepseek - fireworks - google-ai-studio - groq - helicone - mistral - nebius - novita - openai - openrouter - perplexity - vertex - xai nullable: false AuthorName: type: string enum: - anthropic - deepseek - mistral - openai - perplexity - xai - google - meta-llama - amazon - microsoft - nvidia - qwen - moonshotai - alibaba - zai - baidu - passthrough StandardParameter: type: string enum: - max_tokens - max_completion_tokens - temperature - top_p - top_k - stop - stream - frequency_penalty - presence_penalty - repetition_penalty - seed - tools - tool_choice - functions - function_call - reasoning - include_reasoning - thinking - response_format - json_mode - truncate - min_p - logit_bias - logprobs - top_logprobs - structured_outputs - verbosity - n PluginId: type: string enum: - web nullable: false RateLimits: properties: rpm: type: number format: double tpm: type: number format: double tpd: type: number format: double type: object additionalProperties: false ModalityPricing: description: |- Per-modality pricing configuration. Supports input, cached input (as multiplier), and output rates. properties: input: type: number format: double cachedInputMultiplier: type: number format: double output: type: number format: double type: object additionalProperties: false ModelPricing: properties: threshold: type: number format: double input: type: number format: double output: type: number format: double cacheMultipliers: properties: write1h: type: number format: double write5m: type: number format: double cachedInput: type: number format: double required: - cachedInput type: object cacheStoragePerHour: type: number format: double thinking: type: number format: double request: type: number format: double image: $ref: "#/components/schemas/ModalityPricing" audio: $ref: "#/components/schemas/ModalityPricing" video: $ref: "#/components/schemas/ModalityPricing" file: $ref: "#/components/schemas/ModalityPricing" web_search: type: number format: double required: - threshold - input - output type: object additionalProperties: false BodyMappingType: type: string enum: - OPENAI - NO_MAPPING - RESPONSES EndpointConfig: properties: region: type: string location: type: string projectId: type: string baseUri: type: string deploymentName: type: string resourceName: type: string apiVersion: type: string crossRegion: type: boolean gatewayMapping: $ref: "#/components/schemas/BodyMappingType" modelName: type: string heliconeModelId: type: string providerModelId: type: string pricing: items: $ref: "#/components/schemas/ModelPricing" type: array contextLength: type: number format: double maxCompletionTokens: type: number format: double ptbEnabled: type: boolean version: type: string rateLimits: $ref: "#/components/schemas/RateLimits" priority: type: number format: double type: object additionalProperties: false Record_string.EndpointConfig_: properties: {} additionalProperties: $ref: "#/components/schemas/EndpointConfig" type: object description: Construct a type with a set of properties K of type T ResponseFormat: type: string enum: - ANTHROPIC - OPENAI - GOOGLE ModelProviderConfig: properties: pricing: items: $ref: "#/components/schemas/ModelPricing" type: array contextLength: type: number format: double maxCompletionTokens: type: number format: double ptbEnabled: type: boolean version: type: string unsupportedParameters: items: $ref: "#/components/schemas/StandardParameter" type: array providerModelId: type: string provider: $ref: "#/components/schemas/ModelProviderName" author: $ref: "#/components/schemas/AuthorName" supportedParameters: items: $ref: "#/components/schemas/StandardParameter" type: array supportedPlugins: items: $ref: "#/components/schemas/PluginId" type: array rateLimits: $ref: "#/components/schemas/RateLimits" endpointConfigs: $ref: "#/components/schemas/Record_string.EndpointConfig_" crossRegion: type: boolean priority: type: number format: double quantization: type: string enum: - fp4 - fp8 - fp16 - bf16 - int4 responseFormat: $ref: "#/components/schemas/ResponseFormat" requireExplicitRouting: type: boolean providerModelIdAliases: items: type: string type: array required: - pricing - contextLength - maxCompletionTokens - ptbEnabled - providerModelId - provider - author - supportedParameters - endpointConfigs type: object additionalProperties: false UserEndpointConfig: properties: region: type: string location: type: string projectId: type: string baseUri: type: string deploymentName: type: string resourceName: type: string apiVersion: type: string crossRegion: type: boolean gatewayMapping: $ref: "#/components/schemas/BodyMappingType" modelName: type: string heliconeModelId: type: string type: object additionalProperties: false Endpoint: properties: pricing: items: $ref: "#/components/schemas/ModelPricing" type: array contextLength: type: number format: double maxCompletionTokens: type: number format: double ptbEnabled: type: boolean version: type: string unsupportedParameters: items: $ref: "#/components/schemas/StandardParameter" type: array modelConfig: $ref: "#/components/schemas/ModelProviderConfig" userConfig: $ref: "#/components/schemas/UserEndpointConfig" provider: $ref: "#/components/schemas/ModelProviderName" author: $ref: "#/components/schemas/AuthorName" providerModelId: type: string supportedParameters: items: $ref: "#/components/schemas/StandardParameter" type: array priority: type: number format: double required: - pricing - contextLength - maxCompletionTokens - ptbEnabled - modelConfig - userConfig - provider - author - providerModelId - supportedParameters type: object additionalProperties: false SimplifiedModalityPricing: properties: input: type: number format: double cachedInput: type: number format: double output: type: number format: double type: object additionalProperties: false SimplifiedPricing: properties: prompt: type: number format: double completion: type: number format: double audio: $ref: "#/components/schemas/SimplifiedModalityPricing" thinking: type: number format: double web_search: type: number format: double image: $ref: "#/components/schemas/SimplifiedModalityPricing" video: $ref: "#/components/schemas/SimplifiedModalityPricing" file: $ref: "#/components/schemas/SimplifiedModalityPricing" cacheRead: type: number format: double cacheWrite: type: number format: double threshold: type: number format: double required: - prompt - completion type: object additionalProperties: false ModelEndpoint: properties: provider: type: string providerSlug: type: string endpoint: $ref: "#/components/schemas/Endpoint" supportsPtb: type: boolean pricing: $ref: "#/components/schemas/SimplifiedPricing" pricingTiers: items: $ref: "#/components/schemas/SimplifiedPricing" type: array required: - provider - providerSlug - pricing type: object additionalProperties: false InputModality: type: string enum: - text - image - audio - video OutputModality: type: string enum: - text - image - audio - video ModelRegistryItem: properties: id: type: string name: type: string author: type: string contextLength: type: number format: double endpoints: items: $ref: "#/components/schemas/ModelEndpoint" type: array maxOutput: type: number format: double trainingDate: type: string description: type: string inputModalities: items: $ref: "#/components/schemas/InputModality" type: array outputModalities: items: $ref: "#/components/schemas/OutputModality" type: array supportedParameters: items: $ref: "#/components/schemas/StandardParameter" type: array pinnedVersionOfModel: type: string required: - id - name - author - contextLength - endpoints - inputModalities - outputModalities - supportedParameters type: object additionalProperties: false ModelCapability: type: string enum: - audio - video - image - thinking - web_search - caching - reasoning ModelRegistryResponse: properties: models: items: $ref: "#/components/schemas/ModelRegistryItem" type: array total: type: number format: double filters: properties: capabilities: items: $ref: "#/components/schemas/ModelCapability" type: array authors: items: type: string type: array providers: items: properties: displayName: type: string name: type: string required: - displayName - name type: object type: array required: - capabilities - authors - providers type: object required: - models - total - filters type: object additionalProperties: false ResultSuccess_ModelRegistryResponse_: properties: data: $ref: "#/components/schemas/ModelRegistryResponse" error: type: number enum: - null nullable: true required: - data - error type: object additionalProperties: false Result_ModelRegistryResponse.string_: anyOf: - $ref: "#/components/schemas/ResultSuccess_ModelRegistryResponse_" - $ref: "#/components/schemas/ResultError_string_" ````