Pricing · xAI
Grok 4.5
xAI's grok-4.5, 500K tokens of context. Every number on this page was read off xAI's own pricing
page — never estimated, never recalled from memory.
How xAI describes it
“SpaceXAI's intelligent coding model for agentic software, engineering, and workflow tasks.”
Pricing
| Input | $2.00 | per 1M tokens |
|---|---|---|
| Output | $6.00 | per 1M tokens |
| Cached input | $0.30 | per 1M tokens · 0.15× the input price |
Long-prompt tiers
Pricing changes above a prompt-size threshold. If your average request is near the boundary, the effective rate is not the headline rate.
| Condition | Input | Output | Cached input |
|---|---|---|---|
| prompt ≥ 200000 tokens | $4.00 | $12.00 | $0.60 |
At the calculator's starting volume, 1M input tokens and 200K output tokens with no cache hits, Grok 4.5 costs $3.20: $2.00 for input and $1.20 for output, at the prices above. Same formula as the calculator; change the volume there.
Where this price sits
$2.00 per 1M input tokens (for prompts under 200K tokens) is the 39th cheapest input price of the 67 current models with a verified price on this site, and the 6th of xAI's 8. Output costs 3.0× the input price.
Other current models in the Grok family:
- Grok Build 0.1 256K tokens $1.00 in · $2.00 out
- Grok 4.3 1M tokens $1.25 in · $2.50 out
- Grok 4.20 (reasoning) 1M tokens $1.25 in · $2.50 out
- Grok 4.20 (non-reasoning) 1M tokens $1.25 in · $2.50 out
- Grok 4.20 Multi-agent 1M tokens $1.25 in · $2.50 out
- Grok 4.6 500K tokens $2.00 in · $6.00 out
- Grok 4.7 500K tokens $2.00 in · $6.00 out
Mentioned in
One post on this site cites Grok 4.5. The sentence is the post's own, taken from where it links here.
-
Prompt Caching Is Not 10% Everywhere: What a Cache Hit Costs Across Eight Providers · September 16, 2026
No single multiplier: Grok 4.6 is $0.50 cached on $2.00 of input, 0.25×; Grok 4.5 $0.30 on the same $2.00, 0.15×; Grok 4.3 and the three Grok 4.20 variants $0.20 on $1.25, 0.16×; Grok Build 0.1 $0.20 on $1.00, 0.20×.
Against Grok 4.3
Grok 4.3 is the earlier version of the same name in this dataset (still current). Against Grok 4.3, Grok 4.5 has input at $2.00 against $1.25, 1.6× as much; output at $6.00 against $2.50, 2.4× as much; cached input at $0.30 against $0.20, 1.5× as much (per 1M tokens). Its prices were verified September 28, 2026: Grok 4.3 pricing →
Specifications
| API model id | grok-4.5 | |
|---|---|---|
| Provider | xAI | |
| Family | Grok | |
| Context window | 500K tokens | |
| Released | July 8, 2026 | |
| Status | Current | |
| Aliases | grok-4.5-latest, grok-build-latest | |
Grok 4.5 was released on July 8, 2026.
Questions about Grok 4.5 pricing
- How much does Grok 4.5 cost per million tokens?
- $2.00 per 1M input tokens and $6.00 per 1M output tokens for prompts under 200,000 tokens, read on xAI's official pricing page on September 28, 2026.
- What does a cached input token cost on Grok 4.5?
- $0.30 per 1M cached input tokens, 15% of the $2.00 input price.
- Does Grok 4.5 cost more for long prompts?
- Yes. For prompts of 200,000 tokens or more it costs $4.00 per 1M input tokens and $12.00 per 1M output tokens, $0.60 for cached input, against $2.00 and $6.00 below that.
Verified September 28, 2026 against xAI's official pricing page. Confidence: confirmed. No price change recorded for this model. How the data is checked.
Other xAI models with a verified price
- Grok Build 0.1 Grok $1.00 in · $2.00 out
- Grok 4.3 Grok $1.25 in · $2.50 out
- Grok 4.20 (reasoning) Grok $1.25 in · $2.50 out
- Grok 4.20 (non-reasoning) Grok $1.25 in · $2.50 out
- Grok 4.20 Multi-agent Grok $1.25 in · $2.50 out
- Grok 4.6 Grok $2.00 in · $6.00 out
- Grok 4.7 Grok $2.00 in · $6.00 out
Cheaper or equally priced alternatives
Current models with an input price at or below $2.00 per 1M tokens.
- GPT-6.1 Sol OpenAI $2.00 in · $10.00 out
- GPT-6 Sol OpenAI $2.00 in · $10.00 out
- GPT-5.6 Terra OpenAI $2.00 in · $12.00 out
- Claude Sonnet 5.5 Anthropic $2.00 in · $10.00 out
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