GPT-5.5 vs Grok 4.3 API Price Comparison
Prices updated: ·25 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 $0.2069 (TreeRouter) and Grok 4.3 is $0.1724 (PoloAPI). Context windows: GPT-5.5 1050K, Grok 4.3 1024K. GPT-5.5 and Grok 4.3 support image input. 25 provider quotes tracked (GPT-5.5: 17, Grok 4.3: 8), updated daily.
GPT-5.5Frontier
Official
$5.0000
/ 1M tokens
Best Price
$0.2069
/ 1M tokens
17 providers · 1050K Context · 👁 Vision
Grok 4.3Frontier
Official
$1.2500
/ 1M tokens
Best Price
$0.1724
/ 1M tokens
8 providers · 1024K Context · 👁 Vision
At official prices, Grok 4.3 is ~75% cheaper. At the best relay price, Grok 4.3 is ~17% 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 | $0.2069 | $0.1724 ✓ |
| Cheapest output / 1M tokens | $1.2414 | $0.3448 ✓ |
| providers | 17 | 8 |
| Context | 1050K | 1024K |
| 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, Grok 4.3 with a ~17% 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 1024K 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 $0.2069/1M tokens (TreeRouter). Grok 4.3's is $0.1724/1M tokens (PoloAPI). Relay providers typically offer lower prices with different SLA terms.
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