Grok 4.5 vs o3
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 $100.00/month.
| Grok 4.5 | o3 | |
|---|---|---|
| Provider | xai | openai |
| Input / 1M | $2.00 | $2.00 |
| Output / 1M | $6.00 | $8.00 |
| Per request (sample) | $0.00500 | $0.00600 |
| Monthly (sample) | $500.00 | $600.00 |
| Context window | 500,000 | 200,000 |
| Vision | Yes | Yes |
| Reasoning | Yes | Yes |
| Arena · Overall | 1451 | 1422 |
| Arena · Coding | 1550 | 1428 |
| Arena · Math & reasoning | 1445 | 1435 |
| Arena · Agentic / tool use | 1420 | 1410 |
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
Grok 4.5 and o3 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
FAQ
Which is cheaper, Grok 4.5 or o3?
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 $600.00/month.
What is the context window of Grok 4.5 and o3?
Grok 4.5 supports 500,000 tokens, while o3 supports 200,000 tokens.
Estimates for planning only. Verify current pricing with each provider.