Direct API pricing comparison
GPT-5.6 Sol vs Grok 4.3
Compare current direct API token prices and estimated monthly workload costs for GPT-5.6 Sol and Grok 4.3.
2direct models
Pricing only.Grok 4.3 is cheaper in 4 of 4 comparable standard workload presets below. This is a pricing comparison only; it does not rank model quality.
| Model | Input | Cached | Output | Context | Max output | Source |
|---|---|---|---|---|---|---|
GPT-5.6 SolOpenAI · Direct API | $4 | $0.4 | $20 | 1.05M | 128K | Direct ↗ |
Grok 4.3xAI · Direct API | $1.25 | $0.2 | $2.5 | 1M | — | Direct ↗ |
Same workload, different API bill
These four presets use 30 active days, standard direct rates, no retries, no reasoning-token add-on, no cache writes, and the cached-input percentage shown in each row.
| Standard workload | GPT-5.6 Sol | Grok 4.3 | Lower monthly estimate |
|---|---|---|---|
| Chat10,000/day · 2,000 in · 500 out · 25% cached | $4,860 | $967.5 | Grok 4.3 by $3,892.5 / mo |
| Coding2,000/day · 12,000 in · 1,800 out · 55% cached | $3,614.4 | $754.2 | Grok 4.3 by $2,860.2 / mo |
| Agent1,200/day · 32,000 in · 2,500 out · 65% cached | $3,712.32 | $878.76 | Grok 4.3 by $2,833.56 / mo |
| Documents400/day · 180,000 in · 2,000 out · 15% cached | $7,953.6 | $2,419.8 | Grok 4.3 by $5,533.8 / mo |
The main calculator includes batch mode, long-context rules, retries, reasoning tokens, cache writes, and other model-specific pricing logic that a static comparison cannot fully capture.