Model

Reka Flash (21B)

CLOSED

Reka AI · Reka family · released Feb 12, 2024

Original 21B Reka Flash, announced Feb 12, 2024 (documented together with Edge/Core in Reka's April 2024 tech report); iterated into a Sep 2024 build and then superseded by Flash 3/3.1, and no longer separately served on Reka's API under its original form.

ReasoningCodingVisionFunction callingTool useAgentic

633.5

Elo · rank #276

Parameters

21B

Active params

21B (dense)

Context

128K tokens

Architecture

21B dense multimodal transformer (Core/Flash/Edge series)

License

Proprietary

Languages

—

API price (in/out)

No hosted API

Modalities

text · vision

Benchmark results

Bar shows position within the tracked field; marker = field best

GPQA DiamondReasoning34.0%#246

best: GPT-5.6 · 94.6%

GSM8KMath85.8%#63

best: Llama 3.1 405B · 96.8%

HumanEvalCoding72.0%#78

best: Claude Opus 4.5 · 99.4%

MATH-500Math29.6%#166

best: GPT-5 · 99.4%

MMLUKnowledge75.9%#121

best: OpenAI o3 · 92.9%

MMMUVision53.3%#88

best: Claude Fable 5 · 89.3%

MT-BenchHuman preference8.2#41

best: Hunyuan-Large (A52B) · 9.4

PubMedQAKnowledge69.0%#9

best: Palmyra Med 70B · 79.6%

VQAv2Vision78.4%#11

best: Reka Edge (2026) · 88.4%

XWinogradReasoning84.0%#4

best: Sarashina2-70B · 91.8%

Run it locally

Closed weights — available via API only. No local deployment.

Input / M tok

—

Output / M tok

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Reka family

Elo progression across releases

Reka Edge (7B)Feb 2024378.0 Reka Flash (21B)Feb 2024633.5 Reka CoreApr 2024909.9 Reka Flash 3Mar 20251241.4 Reka Edge (2026)Mar 20261698.3

Resources

DOCSdocs.reka.ai

API price — · each benchmark row carries its own source badge (see methodology)