A rate per million tokens is not a budget. The calculator takes your request volume, prompt size and cache hit rate and gives you a monthly figure.
Grok 4.5 API pricing (October 2026)
Prompts of 200K+ tokens bill at 2x ($4 in / $12 out).
What it costs at real volumes
A chat-shaped workload: 800 input tokens and 300 output tokens per request, no caching, no batch.
Specifications
- Provider
- xAI Grok
- Context window
- 500K tokens
- Max output
- 33K tokens
- Tier
- Flagship
- Status
- GA
- Blended $/1M (3:1)
- $3.00
- Cache break-even, caching each turn
- 0%, caching always saves
- Prices verified
- 30 Oct 2026
Source: xAI Grok pricing. Finitizer is not affiliated with xAI Grok.
Similar models
Closest prices elsewhere
- Mistral Medium 3.5same price
- Claude Sonnet 5.5+$1.00
- GPT-6.1 Sol+$1.00
- GPT-6.1 Terra-$1.00
Frequently asked questions
How much does Grok 4.5 cost per 1M tokens?
Grok 4.5 costs $2.00 per million input tokens and $6.00 per million output tokens at xAI Grok list prices. Output is 3.0x the input rate, so the input:output ratio of a workload drives the real cost more than the headline price.
Does Grok 4.5 support prompt caching?
Yes. Cached input is billed at $0.300 per million tokens, 7x cheaper than uncached input. There is no cache-write premium, so caching is never a net loss.
What is the batch discount for Grok 4.5?
Requests submitted through the asynchronous batch endpoint are billed at 20% off both input and output rates, bringing input to $1.60 and output to $4.80 per million tokens.
What is Grok 4.5's context window?
500K tokens of context with up to 33K output tokens per request. A larger context window raises the ceiling on what you can send, not the price per token, but filling it on every request is one of the most common causes of an unexpected bill.
Running Grok 4.5 in production?
Finitizer Tokenomics reads what this model actually costs you from your own bills and exports, shows which workload, team or API key is spending it, flags a spike or a new spend source the day your data shows it, and forecasts where the month will land.
See Finitizer Tokenomics