Grok 4.3 vs o3
Cost and capability comparison. For a sample workload of 1,000 input and 500 output tokens across 100,000 requests/month, Grok 4.3 is cheaper by about $350.00/month.
| Grok 4.3 | o3 | |
|---|---|---|
| Provider | xai | openai |
| Input / 1M | $1.25 | $2.00 |
| Output / 1M | $2.50 | $8.00 |
| Per request (sample) | $0.00250 | $0.00600 |
| Monthly (sample) | $250.00 | $600.00 |
| Context window | 1,000,000 | 200,000 |
| Vision | Yes | Yes |
| Reasoning | Yes | Yes |
| Arena · Overall | 1400 | 1422 |
| Arena · Coding | 1358 | 1428 |
| Arena · Math & reasoning | 1382 | 1435 |
| Arena · Agentic / tool use | 1365 | 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 4.3 and o3 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
FAQ
Which is cheaper, Grok 4.3 or o3?
For a workload of 1,000 input and 500 output tokens over 100,000 requests/month, Grok 4.3 is cheaper, costing about $250.00/month versus $600.00/month.
What is the context window of Grok 4.3 and o3?
Grok 4.3 supports 1,000,000 tokens, while o3 supports 200,000 tokens.
Estimates for planning only. Verify current pricing with each provider.