flint-v1-0-free
Flint (free) is an open-weight mixture-of-experts model from Recursive with about 2.5B active out of 40B total parameters, built by Recursive’s Eureka Machine autoresearch system for coding agents. This is the free tier served through OpenRouter: requests are rate-limited, the free version may be withdrawn at any time, and free providers may log prompts — use the paid version for production.
料金： 入力：100 万トークンあたり 0 クレジット（約 $0.00）、出力：100 万トークンあたり 0 クレジット（約 $0.00）。
今日はどんなお手伝いができますか？
このデモページにはクライアントの完全な記憶機能はありません。すべての機能をご利用いただくには、クライアントまたは CLI から接続してください。
Flint (free) is an open-weight mixture-of-experts model from Recursive with about 2.5B active out of 40B total parameters, built by Recursive’s Eureka Machine autoresearch system for coding agents. This is the free tier served through OpenRouter: requests are rate-limited, the free version may be withdrawn at any time, and free providers may log prompts — use the paid version for production.
Flint (free) at a glance
Flint (free) is a chat model from Recursive. It accepts text as input and returns text, with a context window of up to 262K tokens.
Use it without hosting anything
The same key also works for the other chat, image, video and audio models on ModelFold.
Core Capabilities of Flint (free)
Up to 262K tokens of context
Keep long conversations, large documents and sizeable code in a single request, so the model can reason over the full material instead of fragments.
Function calling
Flint (free) supports tool (function) calling: describe your functions in the request and the model returns structured calls your code can run — the basis for agents and integrations.
Reasoning mode
Flint (free) can produce reasoning before its final answer; in the Playground you can switch reasoning on or off to compare results.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
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Step 1: Try it in the Playground
Open the Playground at the top of this page, type a prompt and see how Flint (free) responds before writing any code.
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Step 2: Create an API key
Sign in to ModelFold and create an API key in the console. Keep it secret and send it as a Bearer token.
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Step 3: Send a request
Call POST https://modelfold.ai/v1/chat/completions with "model": "flint-v1-0-free" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.
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Step 4: Ship and monitor
Integrate the response into your product and check token usage and spend for every call in the console logs.
AI coding assistants
Generate, explain, debug and refactor code, review pull requests and work through multi-file changes in developer tools and IDE plugins.
Autonomous agents
Build agents that plan multi-step tasks, call your tools and APIs, and keep working toward a goal across long sessions.
High-volume pipelines
Run classification, extraction, rewriting and batch jobs at scale where cost per request matters.
Frequently Asked Questions
What is Flint (free)?⌄
Flint (free) is an open-weight mixture-of-experts model from Recursive with about 2.5B active out of 40B total parameters, built by Recursive’s Eureka Machine autoresearch system for coding agents. This is the free tier served through OpenRouter: requests are rate-limited, the free version may be withdrawn at any time, and free providers may log prompts — use the paid version for production.
Which inputs does Flint (free) support?⌄
Flint (free) accepts text and returns text. Through ModelFold you send text messages; documents attached in the Playground are converted to text.
How long is the context window of Flint (free)?⌄
Up to 262K tokens, shared between your input and the model’s output.
Does Flint (free) support function calling?⌄
Yes. Flint (free) supports tools / function calling through the standard tools parameter of the chat completions API.
How is Flint (free) billed on ModelFold?⌄
This is the free version served through OpenRouter: calls are not charged, but they are rate-limited and the free version may be withdrawn at any time. Use the paid version of the model for production traffic.
| 入力 | 0 クレジット 1M tokens≈ $0.00 |
| 出力 | 0 クレジット 1M tokens≈ $0.00 |
トークン単位で課金し、入力と出力は別料金です。思考トークンは出力に含まれます。Playground でも同じ計算を使います。
API ドキュメントを見る →AI Agents · Claude Code / Cursor / Trae →curl https://modelfold.ai/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"flint-v1-0-free","messages":[{"role":"user","content":"Hello"}]}'