Pricingby GlyphGrok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities.
Ways to buy 4
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
The lab's own API · cached $0.2 | $1.25 | $2.5 | $1.25 / $2.5List price | $0.2 | List price |
zdr · cached $0.2 | $1.25 | $2.5 | $1.25 / $2.5Same as list | $0.2 | Same as list |
priority · cached $0.4 | $2.5 | $5 | $2.5 / $5+100% vs list | $0.4 | +100% vs list |
zdr-priority · cached $0.4 | $2.5 | $5 | $2.5 / $5+100% vs list | $0.4 | +100% vs list |
USD per 1M tokens. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $175.00 direct.
Kong AI Gateway$175.00+0%
LiteLLM$175.00+0%
Eden AI$184.63+5.5%
OpenRouter$184.63+5.5%
Cloudflare AI GatewayNot offeredNot offered
HeliconeNot offeredNot offered
Martian GatewayNot offeredNot offered
Neon AI GatewayNot offeredNot offered
RequestyNot offeredNot offered
Vercel AI GatewayNot offeredNot offered
A dash: not on that gateway's own model list. No published token fee: Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | |||||||
|---|---|---|---|---|---|---|---|---|
xAI · 500K | $2 | $6 | $2 / $6 | $3 | 500K | Lab list price | · | Grok 4.7 is SpaceXAI's flagship model for coding, agentic tasks, and knowledge work, succeeding Grok 4.6. |
xAI · 500K | $2 | $6 | $2 / $6 | $3 | 500K | Lab list price | · | Grok 4.6 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM. |
xAI · 500K | $2 | $6 | $2 / $6 | $3 | 500K | Lab list price | · | Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM. |
xAI · 256K | $1 | $2 | $1 / $2 | $1.25 | 256K | Lab list price | · | Grok Build 0.1 is SpaceXAI’s fast coding model trained specifically for agentic software engineering workflows. |
OpenAI · 1.05MCheapest: $1 on OpenAI (flex) | $1 | $5 | $1 / $5 | $2 | 1.05M | $1 on OpenAI (flex) | · | GPT-6.1 Terra is the mid-tier model in OpenAI's GPT-6.1 series, priced below GPT-6.1 Sol. |
Google · 1MCheapest: $0.75 on Google Gemini API (flex) | $0.75 | $3.75 | $0.75 / $3.75 | $1.5 | 1M | $0.75 on Google Gemini API (flex) | · | Gemini 3.8 Flash is Google's most intelligent Flash model with significant gains from 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning. |
Meta · 1M | $1.25 | $4.25 | $1.25 / $4.25 | $2 | 1M | Lab list price | · | Muse Spark 1.1 is a multimodal reasoning model from Meta, built for agentic tasks. |
Qwen (Alibaba) · 1M | $2 | $6 | $2 / $6 | $3 | 1M | Lab list price | · | Qwen3.8 Max 0902 is an updated snapshot of Qwen3.8 Max from Alibaba's Qwen team. |
About Grok 4.20
Takes text, image, files in and returns text. First listed Apr 1, 2026. Up to 1.8M output tokens. Blended price $1.56 per 1M tokens at 3 input to 1 output. Model id grok-4-20.
Price history
List price since Apr 1, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Grok 4.20
xAI cut its API price: input $2 to $1.25 and output $6 to $2.5 per 1M tokens.
Questions
How much does Grok 4.20 cost?
$1.25 per million input tokens and $2.5 per million output tokens, with cached input at $0.2.
What is the context window of Grok 4.20?
2M tokens, with up to 1.8M tokens of output.
Where is Grok 4.20 cheapest?
Of 4 routes tracked, xAI is cheapest at $1.25 input and $2.5 output per million tokens.
Has Grok 4.20's price changed?
Yes. The output price went from $6 to $2.5, first seen May 4, 2026.