Reka AI: Reka Flash 3

rekaai/reka-flash-3

Try Reka Flash 3 for free in your browser, and add it to your app for free with Puter.js AI API.

Try it free Add to your app

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms", {
    model: "rekaai/reka-flash-3"
}).then(response => {
    document.body.innerHTML = response.message.content;
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.chat("Explain quantum computing in simple terms", {
            model: "rekaai/reka-flash-3"
        }).then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

Model Card

Reka Flash 3 is a 21-billion-parameter reasoning model developed by Reka AI, designed as a compact but capable general-purpose LLM. It excels at chat, coding, instruction following, and function calling.

The model uses chain-of-thought reasoning via explicit thinking tags, and supports a "budget forcing" mechanism that lets you cap reasoning steps to control latency. It offers a 130K-token context window and is text-only (no image input).

Reka AI positions it as competitive with OpenAI's o1-mini while being significantly smaller. It scores 65.0 on MMLU-Pro — modest for knowledge-heavy tasks, so pairing it with search or retrieval is recommended. It's primarily English-focused.

Priced at $0.20 per million input tokens and $0.80 per million output tokens via the Reka API, it's a cost-effective option for developers who need solid reasoning at low cost.

Context Window 66K

tokens

Max Output 59K

tokens

Input Cost $0.1

per million tokens

Output Cost $0.2

per million tokens

Release Date Mar 12, 2025

Try Reka Flash 3 for free

Try Reka Flash 3 instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.

Chat rekaai/reka-flash-3

Chat with Reka Flash 3

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Reka Edge

Reka Edge is a 7B multimodal vision-language model that processes text, image, and video inputs with industry-leading performance in its size class for visual reasoning, object detection, and agentic tool-use. It features a ConvNeXt V2 vision encoder that extracts only 64 tokens per image tile, enabling exceptionally fast and low-latency inference ideal for real-time applications like robotics, automotive, and augmented reality. It demonstrates frontier-level tool-calling abilities and strong temporal video reasoning, outperforming comparable models on benchmarks like MLVU, MMVU, and RefCOCO.

Frequently Asked Questions

How do I use Reka Flash 3?

You can access Reka Flash 3 by Reka AI through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.

Can I try Reka Flash 3 for free?

Reka Flash 3 is free to try with a Puter account. Every account includes a free AI allowance, and you can chat with it in the playground on this page. You can upgrade your account anytime for a larger allowance.

Is the Reka Flash 3 API free for developers?

Reka Flash 3 is free to integrate using the Puter.js AI API. With the User-Pays Model, you can add AI to your app for $0, since users cover their own AI usage through their Puter account.

What is the pricing for Reka Flash 3?

Reka Flash 3 costs $0.1 per 1M input tokens and $0.2 per 1M output tokens.

	Price per 1M tokens
Input	$0.1
Output	$0.2

Who created Reka Flash 3?

Reka Flash 3 was created by Reka AI and released on Mar 12, 2025.

What is the context window of Reka Flash 3?

Reka Flash 3 supports a context window of 66K tokens. For reference, that is roughly equivalent to 131 pages of text.

What is the max output length of Reka Flash 3?

Reka Flash 3 can generate up to 59K tokens in a single response.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Reka Flash 3 API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.

Add Reka Flash 3 to your app for free

Developers can integrate Reka Flash 3 for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.

Get started How pricing works