Question 1

What is Grok 4.20?

Accepted Answer

Grok 4.20 is a model from xAI, released on Feb 17, 2026. Grok 4.20 is a reasoning model from xAI 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.

Question 2

How much does Grok 4.20 cost?

Accepted Answer

On the Respan gateway, input starts at $1.25 per 1M tokens on every provider, and output starts at $2.50 per 1M tokens on every provider, after gateway discounts.

Question 3

Which providers serve Grok 4.20 on Respan?

Accepted Answer

8 providers serve Grok 4.20: OpenRouter and xAI.

Question 4

What is Grok 4.20's context window?

Accepted Answer

Grok 4.20 accepts up to 2M tokens of context on its largest provider route.

Question 5

How do I use Grok 4.20 with the Respan gateway?

Accepted Answer

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "xai/grok-4.20-experimental-beta-latest". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Question 6

How fast is Grok 4.20?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was OpenRouter at 20 tokens per second, and the lowest response latency was 0.5 seconds on OpenRouter. Speed varies with request size and provider.

Provider	Context	Input	Output
OpenRouter`openrouter/x-ai/grok-4.20`	2M	$1.25/M	$2.50/M
xAI`xai/grok-4.20`	1M	$1.25/M	$2.50/M
xAI`xai/grok-4.20-0309`	1M	$1.25/M	$2.50/M
xAI`xai/grok-4.20-beta`	1M	$1.25/M	$2.50/M
xAI`xai/grok-4.20-beta-0309`	1M	$1.25/M	$2.50/M
xAI`xai/grok-4.20-beta-latest`	1M	$1.25/M	$2.50/M
xAI`xai/grok-4.20-experimental-beta-0304`	1M	$1.25/M	$2.50/M
xAI`xai/grok-4.20-experimental-beta-latest`	1M	$1.25/M	$2.50/M

Grok 4.20

Providers

Certified where it counts.

Pricing

Cost by volume

Throughput and latency

Output speed

Response latency

Apps

Grok 4.20 FAQ

Works with your entire stack

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