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SpaceXAI: Grok 4.20 API Pricing

SpaceXAI: Grok 4.20 is an API model from x-ai. It costs $1.25 per 1M input tokens and $2.5 per 1M output tokens, with cached input at $0.2. Its context window is 2,000,000 tokens with up to 1,800,000 output tokens. A workload of 10M input + 2M output tokens costs about $17.5 per month.
Input
$1.25
per 1M tokens
Output
$2.5
per 1M tokens
Cached input
$0.2
per 1M tokens
Context window
2M
2,000,000 tokens
Blended (80/20)
$1.5
per 1M tokens

Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...

How much does SpaceXAI: Grok 4.20 cost for a real workload?

At 10M input + 2M output tokens per month, SpaceXAI: Grok 4.20 costs about $17.5 ($12.5 input + $5 output). Try your own volumes in the cost calculator.

What are cheaper alternatives to SpaceXAI: Grok 4.20?

Where to run SpaceXAI: Grok 4.20

AI/ML API: one API key for 400+ models, including most models tracked here · Novita AI: pay-as-you-go APIs for open models (DeepSeek, Qwen, Llama and more) plus GPU cloud. Prices there follow each platform's own catalog and can differ from the list prices tracked here.

Run it on AI/ML API →Run it on Novita AI →

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Compare SpaceXAI: Grok 4.20 with other models

SpaceXAI: Grok 4.20 vs SpaceXAI: Grok Build 0.1SpaceXAI: Grok 4.20 vs SpaceXAI: Grok 4.3 (batch)SpaceXAI: Grok 4.20 vs SpaceXAI: Grok 4.3SpaceXAI: Grok 4.20 vs SpaceXAI: Grok 4.20 Multi-AgentSpaceXAI: Grok 4.20 vs SpaceXAI: Grok 4.7SpaceXAI: Grok 4.20 vs SpaceXAI: Grok 4.6

Frequently asked questions

How much does SpaceXAI: Grok 4.20 cost?

SpaceXAI: Grok 4.20 costs $1.25 per 1M input tokens and $2.5 per 1M output tokens (list price, snapshot October 22, 2026). At 10M input + 2M output tokens per month that is about $17.5.

What is the context window of SpaceXAI: Grok 4.20?

SpaceXAI: Grok 4.20 has a context window of 2,000,000 tokens and can return up to 1,800,000 output tokens per response.

What are cheaper alternatives to SpaceXAI: Grok 4.20?

Cheaper models include StepFun: Step 5 Preview ($1 in / $2.7 out), Elorian: Glimpse ($0.6 in / $3 out), ByteDance Seed: Seed-2.0-Code ($0.5 in / $3 out). See the full list on this page.

Is SpaceXAI: Grok 4.20 free to use?

No. SpaceXAI: Grok 4.20 is a paid model at $1.25 input / $2.5 output per 1M tokens. 21 free models are listed on the free models page.

Provider: x-ai · Model ID: x-ai/grok-4.20 · Modality: text+image+file->text · Price snapshot October 22, 2026, refreshed daily. How we collect prices