Grok 4.20
$1.25 per 1M input tokens and $2.50 per 1M output tokens · 2M context · vision, tools, reasoning, JSON.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
What Grok 4.20 costs per month
Estimated monthly bill for typical workloads, using the cached-input price for repeated context. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $433 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $122 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $227 |
| Content generation 30 long articles a day | $9.00 |
| Classification / extraction 100,000 short items a day | $1,238 |
Prompts above 200K tokens are billed at $2.50 input / $5.00 output per 1M.
Price history
We started tracking Grok 4.20 on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Where to run Grok 4.20: 4 providers
xAI is the cheapest at $1.25 input / $2.50 output per 1M tokens. Uptime is the average over the last 30 days as reported by OpenRouter; see provider reliability.
Cheaper alternatives to Grok 4.20
Models with the same tool calling, image input, structured output for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| MiMo-V2.6-Pro Xiaomi | $0.435 | $0.87 | 1.05M | visionaudiotoolsreasoningJSONopen weights |
| Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | visiontoolsreasoningJSON |
| GLM 5.3 Flash Z.ai | $0.041 | $0.12 | 1.05M | visiontoolsreasoningJSONopen weights |
| DeepSeek V4.1 Flash 1017 DeepSeek | $0.30 | $1.20 | 1.05M | visiontoolsreasoningJSONopen weights |
| GPT-6 Luna OpenAI | $0.10 | $0.50 | 1.05M | visiontoolsreasoningJSON |
How to pay less for Grok 4.20
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $660 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to MiMo-V2.6-Pro (similar capabilities) | $136 | $524 (79%) |
| Use prompt caching (60% of input cached) | $433 | $227 (34%) |
Other workloads: cut-your-bill tool for Grok 4.20.
Specifications
| Model ID | x-ai/grok-4.20 |
| Input | text, image, file |
| Output | text |
| Tool calling | Yes |
| Structured output | Yes |
| Reasoning mode | Yes |
| Open weights | No |
| Knowledge cutoff | 2025-09-01 |
| Released | Mar 31, 2026 |
| Web search | $0.0050 per request |
FAQ
- How much does Grok 4.20 cost?
- $1.25 per million input tokens and $2.50 per million output tokens; cached input costs $0.20 per million. Prompts over 200K tokens are billed at $2.50 / $5.00. Prices as of Oct 21, 2026.
- What is the context window of Grok 4.20?
- 2M tokens, with up to 1.8M output tokens per response.
- Does Grok 4.20 support images, tools and structured output?
- Images as input: yes. Tool calling: yes. Structured (JSON) output: yes. Reasoning mode: yes.
- What are cheaper alternatives to Grok 4.20?
- Models with the same key capabilities for at least 20% less include MiMo-V2.6-Pro ($0.435 / $0.87), Claude Haiku 5.5 ($0.10 / $0.50), GLM 5.3 Flash ($0.041 / $0.12).
More from xAI: all xAI models · how we collect prices