Model specification · xAI
Grok 4.5
x-ai/grok-4.5
Grok 4.5 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.
SpecificationsReported values
- Context window
- 500K
- Maximum output
- —
- Architecture
- text+image+file->text
- Tokenizer
- Grok
- Knowledge cutoff
- —
- Moderated
- No
- Input modalities
- text image file
- Output modalities
- text
Full pricingUSD where reported
| Price | Standard |
|---|---|
| Input | $2.00 / M |
| Output | $6.00 / M |
Benchmark indexesReported indexes
- Intelligence
- 53.8
- Coding
- 72.4
- Agentic
- 45.7
- Design Arena Elo
- 1283
Example workload costsStandard pricing only
| Workload | Input / output | Cache share | Estimated cost |
|---|---|---|---|
| Quick check | 10K / 1K × 1 | 0% | $0.026 |
| Long analysis | 100K / 4K × 1 | 50% | $0.139 |
| Workday | 20K / 2K × 1,000 | 30% | $41.80 |
More from xAIAll xAI models
| Model | Context | Input / M | Output / M | Intel. |
|---|---|---|---|---|
| Grok Build 0.1 | 256K | $1.00 | $2.00 | 39.8 |
| Grok 4.3 | 1M | $1.25 | $2.50 | 37.6 |