xAI model product
Grok 4 Heavy
Grok 4 Heavy is xAI’s multi-agent version of Grok 4, using multiple Grok 4 agents that work in parallel and collaborate on solutions.
Updated Sep 8, 2026. Default version: Grok-4 Heavy
LLMBoard Score67.2Grok-4 Heavy
Coverage20%6 benchmark families
Context windowN/ATokens
Official input priceN/AOfficial price unavailable
Grok 4 Heavy Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
Grok 4 Heavy Benchmark Results
Benchmark scores for Grok-4 Heavy.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkHMMT25 | Score96.70% | Rank01 | Participants28 | Percentile100.00% | EvidenceC | Evaluated |
| BenchmarkUSAMO25 | Score61.90% | Rank02 | Participants3 | Percentile50.00% | EvidenceC | Evaluated |
| BenchmarkAIME 2025 | Score100.00% | Rank04 | Participants119 | Percentile97.46% | EvidenceC | Evaluated |
| BenchmarkLiveCodeBench | Score79.40% | Rank13 | Participants75 | Percentile83.78% | EvidenceC | Evaluated |
| BenchmarkHumanity's Last Exam | Score50.70% | Rank23 | Participants103 | Percentile78.43% | EvidenceC | Evaluated |
| BenchmarkGPQA | Score88.40% | Rank35 | Participants247 | Percentile86.18% | EvidenceC | Evaluated |
Grok 4 Heavy Arena Results
Preference and agent-evaluation results for the default version.
No Arena results
The default version does not have a matching Arena result yet.
Grok 4 Heavy Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- N/A
- Official provider
- N/A
- Lowest third-party
- N/A
- Tracked offerings
- 0
No provider prices
The default version has no current input or output token prices.
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
Grok 4 Heavy Runtime Performance
Provider-specific output speed and catalog latency for Grok-4 Heavy. Runtime does not affect the capability score.
No runtime data
No provider-specific speed or latency record is linked to the default version yet.
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
Grok 4 Heavy Specifications
Technical details for the model's default version.
- Version
- Grok-4 Heavy
- Released
- Unknown
- Knowledge cutoff
- Dec 31, 2024
- Parameters
- N/A
- Context window
- N/A
- Max output
- N/A
- Inputs
- image, text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
Grok 4 Heavy Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionGrok-4 Heavy | ReleasedN/A | LLMBoard67.18 | ParametersN/A | ContextN/A | Max outputN/A | Open weightsNo | LicenseProprietary |
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What is Grok 4 Heavy?
Key information about Grok 4 Heavy and its available data.
Grok 4 Heavy is an AI model from xAI that runs multiple Grok 4 agents in parallel, compares their solutions, and combines their insights. It uses approximately 10x more test-time compute than regular Grok 4 and scored over 50% on text-only problems from the Humanities Last Exam and a perfect result on AIME 2025.
Data as of 2026-09-08.
FAQ
Common questions about Grok 4 Heavy.
When was Grok 4 Heavy released?
A release date is not available for the default version.
How much does Grok 4 Heavy cost?
No official standard PAYG price is currently available for Grok 4 Heavy.
Who created Grok 4 Heavy?
Grok 4 Heavy was created by xAI.
What is the context window for Grok 4 Heavy?
A context window is not available for the default version.
Is Grok 4 Heavy open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer Grok 4 Heavy?
No provider offering is currently linked to the default version.