Head to head

Reka vs Grok

Reka (Reka AI) and Grok (xAI) both sit in Writing. Reka is the cheaper entry point at API usage-based; on-prem option. Grok shipped more tracked changes in the last 30 days (10 vs 0). Every value below comes from the latest crawl of the vendors' own pages.

AttributeReka

Reka AI

Grok

xAI

SegmentWritingWriting
VersionReka Flash 3.1Grok 4.7
Entry costAPI usage-based; on-prem optionfrom $2/mo
Pricing tiers—Grok 4.7 Input (per 1M tokens) $2 · Grok 4.7 Output (per 1M tokens) $6
Model stackReka Core · Reka Flashgrok-4.5 · grok-4.6 · grok-4.7 · grok-imagine-image · grok-imagine-image-2.0 · grok-imagine-image-quality · grok-imagine-video · grok-imagine-video-1.5
Context window—500000
Public API
Routes models
Changes / 30d010
OriginGlobalGlobal
CapabilitiesMultimodal input, On-prem, Research agentReal-time X search, Think and Big Brain modes, Voice mode, Image generation, API access, text generation, agentic coding, voice agent

Grok

Grok pairs xAI's in-house models with live access to the X firehose, sold standalone and bundled into X Premium tiers.

Full Grok record →
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