Last refreshed 2026-05-20. Next refresh: weekly.
Why use Grok 4.20 Reasoning on xAI Console?
xAI Console offers Grok 4.20 Reasoning with pay-as-you-go pricing at $1.25/1M input tokens. xAI, founded by Elon Musk in March 2023, focuses on advancing scientific discovery and understanding the universe through AI.
Compare Grok 4.20 Reasoning across 2 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: grok-4.20-0309-reasoninggrok-4.20-0309-reasoningRequest example
grok-4.20-0309-reasoning.Gotchas
- Use provider model ID "grok-4.20-0309-reasoning", not the LLMReference slug "grok-4.20-reasoning".
Compare Grok 4.20 Reasoning Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| xAI Console | $1.25 | $2.50 |
| Vercel AI Gateway | $1.25 | $2.50 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.25 |
| Output tokens | $2.50 |
Capabilities
About Grok 4.20 Reasoning
Grok 4.20 Reasoning is the xAI API reasoning variant launched around March 10, 2026 as grok-4.20-0309-reasoning. The prior May 2026 seed date was a placeholder; this model was already available months earlier and remains active.
FAQ
What does Grok 4.20 Reasoning cost on xAI Console?
On xAI Console, Grok 4.20 Reasoning costs $1.25 per 1M input tokens and $2.50 per 1M output tokens.
What is the context window for Grok 4.20 Reasoning on xAI Console?
Grok 4.20 Reasoning supports a 1m token context window on xAI Console.
How does xAI Console compare to other Grok 4.20 Reasoning providers?
Grok 4.20 Reasoning is available from 2 providers. The cheapest input pricing is $1.25/1M tokens from xAI Console.
What API model ID do I use for Grok 4.20 Reasoning on xAI Console?
Use the model ID grok-4.20-0309-reasoning when calling xAI Console's API.
Who created Grok 4.20 Reasoning?
Grok 4.20 Reasoning was created by xAI as part of the Grok 4 model family.
Is Grok 4.20 Reasoning open source?
Grok 4.20 Reasoning is not open source; the seed data lists it as proprietary.