OpenAdapter is an all-in-one affordable coding plan. Access the best open-source AI models — DeepSeek, Qwen, Mistral, Kimi K2.5, MiniMax, GLM-5, and more — in any editor. One plan starting at $9/mo.

Which AI models are included?

40+ open-source models across providers including DeepSeek, Qwen, Mistral, Kimi · Moonshot, MiniMax, GLM · Zhipu, Meta Llama, NousResearch, and more. New SOTA models are added on a rolling basis as they become available.

Which editors and tools are supported?

Cursor, VS Code (with Cline, Continue.dev, Roo Code), Windsurf, Claude Code, Aider, OpenCode, Zed, Void, PearAI, and more. Any editor with a custom base URL works.

Do I need to manage API keys?

No. OpenAdapter gives you one endpoint and one subscription. No juggling API keys from multiple providers.

Is there a free tier?

Yes — the Free plan includes 40+ open-source SOTA models with a strict daily quota, no credit card required.

OpenAI Responses API on /v1/responses

The gateway now speaks the OpenAI Responses API at POST /v1/responses, next to Chat Completions and Anthropic Messages. Newer OpenAI SDKs, Codex CLI and the OpenAI Agents SDK use this format by default, so they now work with your OpenAdapter key out of the box.

What works: text and streaming (response.output_text.delta and friends), function tools with streamed arguments, reasoning summaries, image input on vision models, instructions, max_output_tokens, reasoning.effort and text.format for JSON output. Every model and every auto-* tier is available, with the same quota, failover and X-Auto-Model header as the other endpoints.

Not supported: previous_response_id (send the full conversation in input each call) and hosted tools such as web search or file search. Those return a clear error instead of doing something else.

Python:

from openai import OpenAI
client = OpenAI(api_key="sk-cv-...", base_url="https://api.openadapter.in/v1")
r = client.responses.create(model="GPT-6-Luna", input="hello")
print(r.output_text)

See the Responses section in the Guide for JavaScript and curl.