Model specification · xAI
Grok 4.20
x-ai/grok-4.20
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
SpecificationsReported values
- Context window
- 2M
- Maximum output
- 1.8M
- Architecture
- text+image+file->text
- Tokenizer
- Grok
- Knowledge cutoff
- 2025-09-01
- Moderated
- No
- Input modalities
- textimagefile
- Output modalities
- text
Full pricingUSD where reported
| Price | Standard |
|---|---|
| Input | $1.25 / M |
| Output | $2.50 / M |
Benchmark indexesReported indexes
- Intelligence
- 25.7
- Coding
- —
- Agentic
- —
- Design Arena Elo
- 1158
Example workload costsStandard pricing only
| Workload | Input / output | Cache share | Estimated cost |
|---|---|---|---|
| Quick check | 10K / 1K × 1 | 0% | $0.015 |
| Long analysis | 100K / 4K × 1 | 50% | $0.082 |
| Workday | 20K / 2K × 1,000 | 30% | $23.70 |
More from xAIAll xAI models
| Model | Context | Input / M | Output / M | Intel. |
|---|---|---|---|---|
| Grok 4.7 | 500K | $2.00 | $6.00 | 46.4 |
| Grok 4.6 | 500K | $2.00 | $6.00 | 44.3 |
| Grok 4.5 | 500K | $2.00 | $6.00 | 38.8 |
| Grok Build 0.1 | 256K | $1.00 | $2.00 | 27.2 |
| Grok 4.3 | 1M | $1.25 | $2.50 | 24.9 |