Changelog

Type

December 2025

System

Feature Added

Release: New API Endpoints

/v1/responses – OpenAI Responses API compatible/v1/messages – Anthropic Claude Messages API compatible

✨ Overview

We now supports the API schemas from both OpenAI and Anthropic, introducing two new unified endpoints:

  • `/v1/responses` – OpenAI Responses API compatible
  • `/v1/messages` – Anthropic Claude Messages API compatible

This upgrade enables seamless multimodal input, structured outputs, and tool-use across all 410+ Apertis models, strengthening our position as a unified and future-ready AI gateway.

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🆕 Added

1. `/v1/responses` – OpenAI Responses API Compatibility

  • Fully supports the official OpenAI Responses API specification
  • Backward-compatible with existing Chat Completions requests
  • Supports the flexible `input[]` content structure (text, image, multimodal blocks)
  • Supports response_format including strict JSON Schema, tool calling, and structured outputs
  • Streaming responses use the new OpenAI-aligned SSE protocol
  • Enabled for all 410+ Apertis models, including reasoning and open-source models

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2. `/v1/messages` – Anthropic Claude Messages API Compatibility

  • Full compatibility with Anthropic’s Claude Messages API
  • Supports multi-part content blocks (text / image / tool)
  • Supports strict JSON Schema (response_format: json_schema)
  • Enables Claude-series features such as tool use, vision, and system prompts
  • Functions as a drop-in replacement for the official Claude SDK
  • Automatically normalizes and harmonizes content block structures for cross-provider compatibility
Read more

November 2025