# Upmore > Upmore API documentation — unified access to AI models from ByteDance and OpenAI. ## Docs - [Chat Completions](https://api-docs.upmore.net/api-reference/endpoints/doubao.md): Create a chat completion using Doubao models. The `content` field accepts a plain string for text, or an array of content parts for multimodal input. - [Create Response](https://api-docs.upmore.net/api-reference/endpoints/doubao-responses.md): Creates a model response using Doubao models. The `input` field accepts a plain string for simple text, or an array of message objects for multimodal content. - [Chat Completions](https://api-docs.upmore.net/api-reference/endpoints/openai.md): Creates a model response for the given chat conversation. - [Introduction](https://api-docs.upmore.net/api-reference/introduction.md): Base URL, authentication, request format, and error handling for the Upmore API. - [ByteDance Doubao Compatible Endpoint](https://api-docs.upmore.net/guides/endpoints/doubao.md): Use the Volcengine Ark SDK to access Doubao models on Upmore through /v1/chat/completions and /v1/responses endpoints. - [ChatGPT Compatible Endpoint](https://api-docs.upmore.net/guides/endpoints/openai.md): Use the OpenAI SDK to access all chat models on Upmore through a single /v1/chat/completions endpoint. - [Doubao Seed 2.1 Pro](https://api-docs.upmore.net/guides/model-api/bytedance/doubao-seed-2-1-pro.md): ByteDance Doubao Seed 2.1 Pro chat model, OpenAI-compatible. - [Doubao Seed 2.1 Turbo](https://api-docs.upmore.net/guides/model-api/bytedance/doubao-seed-2-1-turbo.md): ByteDance Doubao Seed 2.1 Turbo chat model, OpenAI-compatible. - [Seedance 2.0 mini](https://api-docs.upmore.net/guides/model-api/bytedance/doubao-seedance-2-0-mini.md): ByteDance Seedance 2.0 mini video model — multimodal reference, editing, extension, first/last-frame, 480p/720p. - [Seedream 5.0 i2i](https://api-docs.upmore.net/guides/model-api/bytedance/doubao-seedream-5-0-i2i.md): ByteDance Seedream 5.0 image-to-image model. Generate images from reference images with text prompts. - [Seedream 5.0 Pro](https://api-docs.upmore.net/guides/model-api/bytedance/doubao-seedream-5-0-pro.md): ByteDance Seedream 5.0 Pro image model — precise editing and layer control, pixel-tiered pricing. - [Seedream 5.0 t2i](https://api-docs.upmore.net/guides/model-api/bytedance/doubao-seedream-5-0-t2i.md): ByteDance Seedream 5.0 text-to-image model. Generate images from text prompts. - [Seedance 2.0](https://api-docs.upmore.net/guides/model-api/bytedance/seedance-2-0.md): ByteDance's Seedance 2.0 video generation model with multimodal reference, video editing, extension, audio generation, and web search. - [Seedance 2.0 Fast](https://api-docs.upmore.net/guides/model-api/bytedance/seedance-2-0-fast.md): ByteDance's Seedance 2.0 Fast video generation model with multimodal reference, video editing, extension, audio generation, and web search. - [Seedance 2.0 Task Query](https://api-docs.upmore.net/guides/model-api/bytedance/seedance-task-query.md): Query the status and result of ByteDance Seedance video generation tasks. - [GPT-5.5](https://api-docs.upmore.net/guides/model-api/openai/gpt-5-5.md): OpenAI GPT-5.5 chat model, OpenAI-compatible. - [GPT Image 2](https://api-docs.upmore.net/guides/model-api/openai/gpt-image-2.md): OpenAI GPT Image 2 image generation model. Next-generation autoregressive + reasoning hybrid model with flexible resolution up to 4K and near-perfect text rendering. - [Introduction](https://api-docs.upmore.net/index.md): Internal AI API gateway for company employees — chat, image, and video behind one OpenAI-compatible endpoint. - [Quickstart](https://api-docs.upmore.net/quickstart.md): Make your first Upmore API call in minutes. ## OpenAPI Specs - [openapi](https://api-docs.upmore.net/api-reference/endpoints/openapi/openai/openapi.yaml) ## Optional - [Documentation](https://docs.upmore.net)