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Grok 4.3 vs o3 Pro
List-price comparison · Grok 4.3 details · o3 Pro details
For a typical workload (100,000 requests / mo), Grok 4.3 costs 96% less — $250.00/mo vs $5,600.00/mo.
| Grok 4.3 | o3 Pro | |
|---|---|---|
| Input / 1M tokens | $1.25 | $20.00 |
| Output / 1M tokens | $2.50 | $80.00 |
| Typical request (1,200 in + 400 out) | $0.0025 | $0.056 |
| Context window | 1M tokens | 200k tokens |
| Max output | — | 100k tokens |
| Tier | Flagship | Flagship |
| Provider | xAI | OpenAI |
Projected monthly cost
1,000 requests / month$2.50 vs $56.0010,000 requests / month$25.00 vs $560.00100,000 requests / month$250.00 vs $5,600.00
Rows open both models in the calculator — adjust volume and token counts there.
Grok 4.3
Strong real-time knowledge via X/Twitter integration and competitive general reasoning at a lower price than other flagship models.
Smaller third-party ecosystem and fewer enterprise compliance certifications than OpenAI/Anthropic/Google offerings.
o3 Pro
Auto-synced from OpenRouter — no editorial write-up yet.
More comparisons
Vendor list rates · per-request examples assume 1,200 input + 400 output tokens.