Last refreshed 2026-05-22. Next refresh: weekly.
Why use Grok 4.20 Reasoning on Vercel AI Gateway?
Vercel AI Gateway offers Grok 4.20 Reasoning with pay-as-you-go pricing at $1.25/1M input tokens. Vercel AI Gateway is a unified AI proxy providing a single OpenAI-compatible API endpoint to 275+ models from 25+ providers including Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, xAI, Alibaba, Amazon, ByteDance, Cohere, MiniMax, MoonshotAI, KwaiPilot, Black Forest Labs, Recraft, Voyage AI, NVIDIA, and more.
Compare Grok 4.20 Reasoning across 2 providers to find the best fit for your use caseSetup recipe
Python + curlpip install openaiexport AI_GATEWAY_API_KEY=...import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],xai/grok-4.20-reasoningRequest example
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],
base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
model="xai/grok-4.20-reasoning",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "xai/grok-4.20-reasoning", not the LLMReference slug "grok-4.20-reasoning".
- creator/model-name e.g. kwaipilot/kat-coder-pro-v2
- The examples expect AI_GATEWAY_API_KEY; rename it only if your application config maps the new variable.
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 |
| Query | $5.00 |
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 Vercel AI Gateway?
On Vercel AI Gateway, Grok 4.20 Reasoning costs $1.25 per 1M input tokens and $2.5 per 1M output tokens.
What is the context window for Grok 4.20 Reasoning on Vercel AI Gateway?
Grok 4.20 Reasoning supports a 2,000,000 token context window on Vercel AI Gateway.
How does Vercel AI Gateway 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 Vercel AI Gateway?
Use the model ID xai/grok-4.20-reasoning when calling Vercel AI Gateway'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's open source status is unknown in the seed data.