xAI
Grok 4.20
Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities.
At a glance
- Input / 1M
- $1.25
- Output / 1M
- $2.50
- Context
- 2M
- Max output
- 1.80M
- Intelligence
- 25.7
- Released
- Mar 2026
Pricing
Grok 4.20 API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $1.25 |
|---|---|
| Output tokensPer 1M tokens | $2.50 |
| Cached input (read)Per 1M tokens | $0.20 |
| Cache writePer 1M tokens | Not available |
| Long-context pricingPrompts above 200K tokens | $2.50 in / $5 out |
| Web searchPer request | $0.005 |
Chat message
2K in, 500 out
$3.75
per 1,000 requests
Coding task
30K in, 4K out
$47.50
per 1,000 requests
Long document summary
150K in, 2K out
$192.50
per 1,000 requests
Benchmarks
Grok 4.20 benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
25.7
Coding index
Not available
Agentic index
Not available
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 2M tokens
- Max output
- 1.80M tokens
- Input types
- File, Image, Text
- Output types
- Text
- Reasoning effort
- Not available
- Release date
- March 31, 2026
- Knowledge cutoff
- September 1, 2025
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
Grok 4.20 vs other models
See how Grok 4.20 stacks up head to head on price, benchmarks, and features.
Grok 4.20 vs Grok Build 0.1
xAI vs xAI
See comparisonGrok 4.20 vs Kimi K2.6
xAI vs Moonshot AI
See comparison
Grok 4.20 vs Qwen3.6 Plus
xAI vs Qwen
See comparisonGrok 4.20 vs GLM 5 Turbo
xAI vs Z.ai
See comparison
Grok 4.20 vs Gemini 3 Flash Preview
xAI vs Google
See comparisonGrok 4.20 vs GLM 5.1
xAI vs Z.ai
See comparisonAlternatives
Grok 4.20 alternatives
Similar models worth considering, and where each one has the edge.
xAI
Grok Build 0.1
Moonshot AI
Kimi K2.6
Qwen
Qwen3.6 Plus
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does Grok 4.20 cost?
Grok 4.20 costs $1.25 per 1M input tokens and $2.50 per 1M output tokens through the API. A typical chat message costs about $3.75 per 1,000 messages.
What is the context window of Grok 4.20?
Grok 4.20 accepts up to 2M tokens of input and can write up to 1.80M tokens in a single response.
What is the best alternative to Grok 4.20?
Grok Build 0.1 from xAI is a strong alternative. It offers: 1.3x cheaper output, higher intelligence score, newer release.
Can I use Grok 4.20 alongside other models?
Yes. Shortcut Chat sends one prompt to Grok 4.20 and any other models you pick at the same time, so you can compare answers side by side.
Try Grok 4.20 next to every other model.
Use Grok 4.20 alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.