#156
XA
Grok 1.5
xAI
19.3 LLMBoard
xAI model product
Grok 4, announced by xAI in summer 2025, represents a major leap in AI capabilities, described as 'the smartest AI in the world.' Built on version 6 of xAI's foundation model, it uses 100x more training compute than Grok 2 and 10x more reinforcement learning compute than Grok 3. The model achieves PhD-level performance across all academic disciplines simultaneously, scoring perfect on standardized tests like the SAT and near-perfect on graduate exams like the GRE. Unlike Grok 3, tool usage is built into the training process rather than relying on generalization. Trained using 200,000 GPUs, Grok 4 excels at complex reasoning, mathematical problem-solving, and coding tasks, though it has acknowledged weaknesses in multimodal capabilities that are being addressed in the next version.
Updated Aug 10, 2026. Default version: Grok-4
Structured fields from the published default version.
This profile uses the latest version under this unique model that has a calculated LLMBoard score. Arena and price are excluded.
No published version under this unique model currently has enough benchmark coverage to calculate a score.
Published benchmark records for the scored version currently unavailable.
No published benchmark result is linked to the scored version.
Preference and agent-evaluation signals from published Arena datasets.
The default version has no published Arena rows, or its source alias has not been resolved.
Official vendor API PAYG pricing is summarized first. The table then lists individual provider offerings without treating their minimum as the official price.
| Poe | xai/grok-4 | global | $3 | $15 | 256K | |
| FastRouter | x-ai/grok-4 | global | $3 | $15 | 256K | |
| LLM Gateway | grok-4 | global | $3 | $15 | 256K | |
| Helicone | grok-4 | global | $3 | $15 | 256K | |
| ZenMux | x-ai/grok-4 | global | $3 | $15 | 256K | |
| Abacus | grok-4-0709 | global | $3 | $15 | 256K |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
All published versions linked to this unique model. The score columns identify the version used by the current overall ranking.
| Grok-4 | N/A | N/A | 256K | 8K | No | Proprietary |
A concise description based on the published model registry.
Grok 4, announced by xAI in summer 2025, represents a major leap in AI capabilities, described as 'the smartest AI in the world.' Built on version 6 of xAI's foundation model, it uses 100x more training compute than Grok 2 and 10x more reinforcement learning compute than Grok 3. The model achieves PhD-level performance across all academic disciplines simultaneously, scoring perfect on standardized tests like the SAT and near-perfect on graduate exams like the GRE. Unlike Grok 3, tool usage is built into the training process rather than relying on generalization. Trained using 200,000 GPUs, Grok 4 excels at complex reasoning, mathematical problem-solving, and coding tasks, though it has acknowledged weaknesses in multimodal capabilities that are being addressed in the next version.
Use the benchmark, Arena and pricing sections above as separate evidence. A missing field means the current data snapshot does not support that claim.
Data snapshot: 2026-08-07. Editorial model content is not available in the backend.
Recommendations prioritize the same model type and family, then the closest published LLMBoard score.
Common questions about Grok 4.
Grok 4's default version was released on Jul 9, 2025.
No official standard PAYG price is currently available for Grok 4. The lowest tracked third-party offer starts at $3 input and $15 output via Poe.
Grok 4 is published under xAI in the model registry.
The default version has a 256K token context window.
No. The default version is not marked as having publicly available weights.
6 published provider offerings are linked to the default version.
No nearby ranked alternatives are currently available.