GPT-4o vs Grok 4.5
Cost and capability comparison. For a sample workload of 1,000 input and 500 output tokens across 100,000 requests/month, Grok 4.5 is cheaper by about $250.00/month.
| GPT-4o | Grok 4.5 | |
|---|---|---|
| Provider | openai | xai |
| Input / 1M | $2.50 | $2.00 |
| Output / 1M | $10.00 | $6.00 |
| Per request (sample) | $0.00750 | $0.00500 |
| Monthly (sample) | $750.00 | $500.00 |
| Context window | 128,000 | 500,000 |
| Vision | Yes | Yes |
| Reasoning | No | Yes |
| Arena · Overall | 1355 | 1451 |
| Arena · Coding | 1350 | 1550 |
| Arena · Math & reasoning | 1340 | 1445 |
| Arena · Agentic / tool use | — | 1420 |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 28 July 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
Compare on your own workload
GPT-4o and Grok 4.5 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
FAQ
Which is cheaper, GPT-4o or Grok 4.5?
For a workload of 1,000 input and 500 output tokens over 100,000 requests/month, Grok 4.5 is cheaper, costing about $500.00/month versus $750.00/month.
What is the context window of GPT-4o and Grok 4.5?
GPT-4o supports 128,000 tokens, while Grok 4.5 supports 500,000 tokens.
Estimates for planning only. Verify current pricing with each provider.