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.

DeepSeek-V4.1-Flash — a big step up for agents and terminals — Changelog

DeepSeek-V4.1-Flash is live. It reads text and images, carries a 1M-token context window, and is built for input-heavy agentic and coding work. Reasoning effort is adjustable, so it can answer quickly or think hard on request. Call it as DeepSeek-V4.1-Flash.

DeepSeek publishes these scores against the earlier V4 Flash, all at maximum reasoning effort:

Benchmark	V4.1 Flash	V4 Flash
Terminal-Bench 2.1	90.6	82.7
Terminal-Bench 3.0	30.0	7.6
DeepSWE v1.1 (resolved)	74.2	54.4
NL2Repo-Bench	64.0	54.2
SEC-Bench Pro	62.8	30.9
HLE with tools	63.9	51.5
Codeforces rating	3471	3289
GPQA Diamond	90.9	89.9

It costs 2 requests of quota per call and is available on every paid plan and the free tier. DeepSeek-V4-Flash stays exactly as it is at 1 request per call, so nothing changes for existing setups. Pick V4.1 when the task is a long agent run or terminal work, and V4 when you want the cheapest fast model.

Source: DeepSeek-V4.1-Flash model card.