Open weightsReka AI/10 trustVerified

Reka Flash 3

Name: Reka Flash 3
Rating: 8

Reka's 21B open reasoning model — adjustable thinking effort under Apache 2.0.

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About

Reka Flash 3, released March 10, 2025, is Reka AI's 21-billion-parameter open-weights reasoning model. It exposes its chain of thought in reasoning tags and includes a budget-enforcement mechanism that caps reasoning steps to trade quality for speed. Reka reports an MMLU-Pro score of 65.0 and positions it near OpenAI's o1-mini on reasoning tasks, though it is weaker on knowledge-intensive questions without web search. Weights are Apache 2.0.

Specs

Context window

32K

Pricing

$0.10/M input, $0.20/M output (OpenRouter, third-party reported)

Free quota

API access

Self-host; API via OpenRouter and Reka

Weights

Open weights

Released

March 10, 2025

Benchmarks

Reka-reported: MMLU-Pro 65.0; competitive with o1-mini on reasoning (vendor claim).

Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.

Use cases

reasoningmathcode assistanceon-device agents

Trust score — 8/10

/10 trustVerified

Scored 8/10 (verified tier, metrics-v1). Evidence: Released March 10, 2025; Apache-2.0; 21B with 32K context; MMLU-Pro 65.0 per Reka; budget-enforced reasoning. License: Apache-2.0..

How the trust score is built

Full methodology →

Adoption · stars/downloads, log-scaled vs peers: 7.0/10
Maintenance · recency, releases, issue load: 7.0/10
Openness · license + docs: 9.0/10
Manual review · sanity read + red-flag check: 7.0/10

· Released March 10, 2025
· Apache-2.0; 21B with 32K context
· MMLU-Pro 65.0 per Reka; budget-enforced reasoning