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 | |
|---|---|---|
| Intelligence | ||
| Arena · Overall(LMArena Elo — higher is better) | 1398 | 1422✓ |
| Arena rank (overall) | #77 | #54✓ |
| Arena · Coding | 1360 | 1428✓ |
| Arena · Math & reasoning | 1382 | 1435✓ |
| Arena · Agentic / tool use | 1365 | 1410✓ |
| Score evidence | Measured | Measured |
| Pricing (USD / 1M tokens) | ||
| Input | $1.25✓ | $2.00 |
| Output | $2.50✓ | $8.00 |
| Cached input (read) | $0.2000✓ | $0.5000 |
| Cache write | — | — |
| Blended(3:1 input:output blend) | $1.56✓ | $3.50 |
| Specs & capabilities | ||
| Provider | xAI | OpenAI |
| Context window | 1M (1,000,000)✓ | 200K (200,000) |
| Max output | — | 100,000✓ |
| Modalities | text | text, image |
| Vision | Yes | Yes |
| Tool use | Yes | Yes |
| Reasoning | Yes | Yes |
| Prompt caching | Yes | Yes |
| Batch pricing | No | Yes |
| Tokenizer | approx | o200k_base |
| Release date | — | — |
| Status | ga | ga |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 18 September 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.