Benchable
Text input
Image input
Text output
Author's Description
Grok 4.20 is xAI's newest flagship model with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering consistently precise and truthful responses. Reasoning can be enabled/disabled using the `reasoning` `enabled` parameter in the API. [Learn more in our docs](https://openrouter.ai/docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)
Key Specifications
Context
2M
Released
Mar 31, 2026
Supported Parameters
This model supports the following parameters:
Temperature
Response Format
Include Reasoning
Seed
Tool Choice
Reasoning
Top Logprobs
Structured Outputs
Max Tokens
Top P
Logprobs
Tools
Features
This model supports the following features:
Tools
Response Format
Reasoning
Structured Outputs
Model Pricing
Current Pricing
| Feature | Price (per 1M tokens) |
|---|---|
| Prompt | $2 |
| Completion | $6 |
| Input Cache Read | $0.2 |
| Web Search | $5000 |
Price History
Available Endpoints
| Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
|---|---|---|---|---|
|
xAI
|
xAI | x-ai/grok-4.20-20260309 | 2M | $2 / 1M tokens | $6 / 1M tokens |
Benchmark Results
| Benchmark | Category | Reasoning | Strategy | Free | Executions | Accuracy | Cost | Duration |
|---|
Other Models by x-ai
|
|
Released | Params | Context |
|
Speed | Ability | Cost |
|---|---|---|---|---|---|---|---|
| xAI: Grok 4.20 Multi-Agent Unavailable | Mar 31, 2026 | — | 2M |
Text input
Image input
File input
Text output
|
— | — | — |
| xAI: Grok 4.20 Multi-Agent | Mar 31, 2026 | — | 2M |
Text input
Image input
File input
Text output
|
— | — | — |
| xAI: Grok 4.20 Unavailable | Mar 31, 2026 | — | 2M |
Text input
Image input
Text output
|
— | — | — |
| xAI: Grok 4.20 Multi-Agent Beta Unavailable | Mar 12, 2026 | — | 2M |
Text input
Image input
Text output
|
— | — | $$$$$ |
| xAI: Grok 4.20 Multi-Agent Beta Unavailable | Mar 12, 2026 | — | 2M |
Text input
Image input
File input
Text output
|
★★★ | ★★★★★ | $$$$$ |
| xAI: Grok 4.20 Beta Unavailable | Mar 12, 2026 | — | 2M |
Text input
Image input
Text output
|
— | — | $$$$$ |
| xAI: Grok 4.20 Beta Unavailable | Mar 12, 2026 | — | 2M |
Text input
Image input
Text output
|
★★★★★ | ★★★★ | $$$$$ |
| xAI: Grok 4.1 Fast | Nov 19, 2025 | — | 2M |
Text input
Image input
File input
Text output
|
★★ | ★★ | $ |
| xAI: Grok 4 Fast | Sep 18, 2025 | — | 2M |
Text input
Image input
File input
Text output
|
★★ | ★★★★★ | $$$$ |
| xAI: Grok Code Fast 1 | Aug 26, 2025 | — | 256K |
Text input
Text output
|
★★ | ★★★★ | $$$$$ |
| xAI: Grok 4 | Jul 09, 2025 | — | 256K |
Text input
Image input
File input
Text output
|
★ | ★★★★★ | $$$$$ |
| xAI: Grok 3 Mini | Jun 10, 2025 | ~2.7T | 131K |
Text input
Text output
|
★★ | ★★★★★ | $$$$ |
| xAI: Grok 3 | Jun 10, 2025 | ~2.7T | 131K |
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
| xAI: Grok 3 Mini Beta | Apr 09, 2025 | ~2.7T | 131K |
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Text output
|
★★ | ★★★★★ | $$$$ |
| xAI: Grok 3 Beta | Apr 09, 2025 | ~2.7T | 131K |
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
| xAI: Grok 2 Vision 1212 Unavailable | Dec 14, 2024 | — | 32K |
Text input
Image input
Text output
|
★★★★ | ★★★★ | $$$$$ |
| xAI: Grok 2 1212 Unavailable | Dec 14, 2024 | — | 131K |
Text input
Text output
|
★★★★ | ★★★★ | $$$$$ |
| xAI: Grok Vision Beta Unavailable | Nov 18, 2024 | — | 8K |
Text input
Image input
Text output
|
★★★★★ | ★★★ | $$$$$ |
| xAI: Grok Beta Unavailable | Oct 19, 2024 | — | 131K |
Text input
Text output
|
★★★★★ | ★★★★★ | $$$$$ |