Directory · Model comparison
GPT-4o vs Grok 4.3
Side-by-side API economics and benchmarks. Per-1M input and output rates, context window, and verified metrics.
Tale of the tape
Head-to-head specs pulled from each model profile.
| Metric | GPT-4o | Grok 4.3 |
|---|---|---|
| Input cost / 1M | $2.50 | $1.25 |
| Output cost / 1M | $10.00 | $2.50 |
| Context window | 128,000 tokens | 1,000,000 tokens |
| MMLU score | — | — |
Cost verdict
Enter monthly input and output volumes to see total cost savings.
GPT-4o
- Input: 1M × $2.50 = $2.50
- Output: 1M × $10.00 = $10.00
- Total
- $12.50
Grok 4.3
- Input: 1M × $1.25 = $1.25
- Output: 1M × $2.50 = $2.50
- Total
- $3.75
Total cost savings
$8.75
Grok 4.3 saves $8.75 per month vs the other model at this volume.
Model routing savings
Uses this page's verified rates. GPT-4o is the premium route (higher combined per-1M cost); Grok 4.3 handles routine traffic.
All premium
GPT-4o
$625.00
100% of input and output on the premium route
Routed stack
80% → Grok 4.3
20% → GPT-4o
$275.00
- Routine slice
- $150.00
- Premium slice
- $125.00
Monthly savings
$350.00
56% lower
Rates pulled from this page's model database entries (gpt-4o, grok-4-3) — same per-1M input/output figures as Tale of the tape. Production routing needs quality gates and monitoring.
Related comparisons
More head-to-head model matchups.