Last refreshed 2026-07-09. 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 caseInput / 1M
$1.25
Output / 1M
$2.50
Cache
read $0.20
Batch
Not sourced
Setup recipe
Python + curlInstall
pip install openaiAuth
export AI_GATEWAY_API_KEY=...Call
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],Model ID
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
VisionMultimodalReasoningJSON / Tool useStructured Outputs
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.
Get Started
Model Specs
Released2026-03-10
Context1m
Knowledge cutoff2024-11