GPT-5.5 vs Grok 4.3 API Price Comparison
Prices updated: ·32 quotes
As of : At official rates, GPT-5.5 is $5.0000/1M input tokens and Grok 4.3 is $1.2500 — Grok 4.3 is ~75% cheaper than GPT-5.5. Via relay providers, the lowest GPT-5.5 rate is $0.0414 (Zhiyuan AI) and Grok 4.3 is $0.0517 (RunAPI). Context windows: GPT-5.5 1050K, Grok 4.3 1000K. GPT-5.5 and Grok 4.3 support image input. 32 provider quotes tracked (GPT-5.5: 21, Grok 4.3: 11), updated daily.
GPT-5.5Frontier
Official
$5.0000
/ 1M tokens
Best Price
$0.0414
/ 1M tokens
21 providers · 1050K Context · 👁 Vision
Grok 4.3Frontier
Official
$1.2500
/ 1M tokens
Best Price
$0.0517
/ 1M tokens
11 providers · 1000K Context · 👁 Vision
At official prices, Grok 4.3 is ~75% cheaper. At the best relay price, GPT-5.5 is ~20% cheaper.
Price Comparison
| GPT-5.5 | Grok 4.3 | |
|---|---|---|
| Official input / 1M tokens | $5.0000 | $1.2500 ✓ |
| Official output / 1M tokens | $30.0000 | $2.5000 ✓ |
| Cheapest input / 1M tokens | $0.0414 ✓ | $0.0517 |
| Cheapest output / 1M tokens | $0.2483 | $0.1034 ✓ |
| providers | 21 | 11 |
| Context | 1050K | 1000K |
| Vision | ✓ | ✓ |
GPT-5.5 — All Providers
Detail page →Grok 4.3 — All Providers
Detail page →Frequently Asked Questions
Which is cheaper, GPT-5.5 or Grok 4.3?
At official price, Grok 4.3 is cheaper by ~75%. At the best relay price, GPT-5.5 with a ~20% difference.
What context window do GPT-5.5 and Grok 4.3 support?
GPT-5.5 has a 1050K token context window; Grok 4.3 has 1000K tokens.
Do GPT-5.5 and Grok 4.3 support image input?
GPT-5.5 supports image input; Grok 4.3 supports image input.
What is the cheapest way to access GPT-5.5 or Grok 4.3?
GPT-5.5's lowest input price is $0.0414/1M tokens (Zhiyuan AI). Grok 4.3's is $0.0517/1M tokens (RunAPI). Relay providers typically offer lower prices with different SLA terms.
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