xAI: Grok 3
Grok 3 is a language model from xAI released on Jun 1, 2024. It reads text and writes text, with a 131K token context window and up to 8K tokens per reply.
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It costs $3 per million input tokens and $15 per million output tokens. Cached input bills at $0.75, 75% less than fresh input.
It supports tool calling and prompt caching.
2 providers serve it, including Helicone and Poe.
- Modalities
- In / out price
- $3 / $15 per 1M
- Context
- 131K
- Max output
- 8K
- Released
- Jun 1, 2024
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Grok 3 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $3 / 1M tokens | |
|---|---|---|
| Output | $15 / 1M tokens | |
| Cached input (read) | $0.75 / 1M tokens | 75% off input |
Grok 3 providers
2 providers serve it, including Helicone and Poe. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Helicone | $3 | $15 | $0.75 | 131K | 131K |
| Poe | $3 | $15 | $0.75 | 131K | 8K |
What Grok 3 costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Grok 3 through an OpenAI compatible API.
- Tools
tools
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Grok 3 questions
How much does the Grok 3 API cost?
$3 per million input tokens and $15 per million output tokens, with cached input at $0.75. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Grok 3?
131,072 tokens of input, and it can write up to 8,192 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Grok 3?
2 providers serve it, including Helicone and Poe. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Grok 3 support tool calling?
Yes. It accepts tool definitions, which is what an agent needs to call your APIs.
Is Grok 3 open source?
No. xAI serves it through an API only, so you cannot download the weights or host it yourself.
When was Grok 3 released?
Jun 1, 2024.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Grok 3?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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