Reka Flash 3

reasoningapache-2.0

Reka Flash 3 is a 21B general-purpose reasoning LLM which excels at chat, coding, and instruction-following while maintaining a level of performance competitive with significantly larger models. Note: Reka Flash 3 is primarily an English model with limited multilingual understanding capabilities.

Context
66K
Max output
66K
Input price
$0.1/1M tokens
Output price
$0.2/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Fine-tuning

Details

Model IDreka-flash-3
Provider Reka AI
Creator reka
Familyreka-flash
Licenseapache-2.0
Statusactive
Typereasoning
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters—
Architecture—
Context window66K tokens
Max input—
Max output66K tokens
Reasoning tokensYes
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.reka.ai/v1/chat/completions

Pricing

Input
$0.1
Output
$0.2
Cache write
—
Cache read
—
Batch in
—
Batch out
—

Family Comparison: reka-flash

ModelContextMax outPricing
Reka Flash 366K66K$0.1$0.2
Reka Flash128K—$0.8$2

API

GET/v1/models/reka/reka-flash-3

Reka Flash 3

reka-flash-3

Reka Flash 3 is a 21B general-purpose reasoning LLM which excels at chat, coding, and instruction-following while maintaining a level of performance competitive with significantly larger models. Note: Reka Flash 3 is primarily an English model with limited multilingual understanding capabilities.

Changes · 3 entries
reka-flash-3updateca7a400Nov 2, 2026, 03:02 AM
description21B-parameter general-purpose reasoning LLM with explicit...→Reka Flash 3 is a 21B general-purpose reasoning LLM which...
context_window32000→65536
capabilitiestool callyes→nofine tuningyes
pricinginput$0.2→$0.1output$0.8→$0.2
max_output_tokens65536
page_urlhttps://developer.reka.ai/models/reka-flash-3
reka-flash-3updateb2f45bfOct 29, 2026, 03:29 AM
description21B-parameter general-purpose reasoning LLM with explicit...→Reka Flash 3 is a 21B general-purpose reasoning LLM which...
context_window32000→65536
pricinginput$0.2→$0.1output$0.8→$0.2
max_output_tokens65536
page_urlhttps://developer.reka.ai/models/reka-flash-3
reka-flash-3create3e56cf1Apr 26, 2026, 07:23 PM