Grok 4.5 API pricing — cost per million tokens
xAI's Grok 4.5 costs $2 per million input tokens and $6 per million output tokens on the standard API tier (verified 2026-09-02). Note: xAI's V9-Medium coding model (1.5T), shipped 2026-07-08; superseded by Grok 4.6 on 2026-08-12 at the same price. Compare it in the full pricing table or price your own prompts in the token cost calculator.
Grok 4.5 price per million tokens
| direction | $ / Mtok | $ / 1K tokens |
|---|---|---|
| input (prompt) | $2 | $0.002 |
| output (completion) | $6 | $0.006 |
What real requests cost on Grok 4.5
| workload | input | output | total |
|---|---|---|---|
| Chat message (1K in / 500 out) | $0.002 | $0.003 | $0.005 |
| Long document (100K in / 2K out) | $0.20 | $0.012 | $0.21 |
| Agent session (500K in / 50K out) | $1.00 | $0.30 | $1.30 |
How Grok 4.5 pricing compares
On the same chat-message workload, Grok 4.5 costs 6.3× more than GPT-5.6 Luna (the cheapest tracked model) — capability, latency and context limits are the other side of that trade. Output tokens dominate long generations: at $6/Mtok, a 50K-token agent transcript costs $0.30 in output alone. Official rate card: xAI pricing.
Related: Grok 4.6 pricing · GPT-5.6 Luna pricing · GPT-5.4 nano pricing · release timeline
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