Grok 4
xAI
xAI's frontier model at its July 2025 launch, positioned as its most capable reasoning model with native tool use and real-time search integration from X. Grok 4 features a 256K-token context window, and a Grok 4 Heavy multi-agent tier is offered to SuperGrok Heavy subscribers.
Strengths
- xAI's most capable model at launch, with strong reasoning
- Native tool use and real-time search integration from X
- 256K-token context window
- Grok 4 Heavy multi-agent tier for the hardest problems
- Strong math and PhD-level science (AIME, GPQA) performance
Caveats
- Superseded by Grok 4.3 (1M context, cheaper) as xAI's flagship
- $3/$15 pricing higher than the newer Grok 4.3 ($1.25/$2.50)
- Real-time X integration can surface unverified social content
- No vendor-published pricing: omitted rather than asserted from a secondary source
- Vendor
- xAI
- Context Window
- 256,000 tokens
- License
- Proprietary
- Release Date
- 2025-07-10
- Modalities
- textimage
Capabilities
Vision
Audio
Video
Tool Use