GPT-5.5 vs Grok 4.3 — Pricing Comparison 2026

Requests per Day

Days per Month

OpenAI

GPT-5.5

$0.00

per month

Input cost

Output cost

Cost per request

Requests/month

xAI

Grok 4.3

$0.00

per month

Input cost

Output cost

Cost per request

Requests/month

Which Model for Which Use Case?

Extreme Cost Savings

Grok 4.3 at $1.25/M input is 75% cheaper than GPT-5.5. For high-volume applications where cost per token is critical, Grok delivers massive savings.

Best value: Grok 4.3 (75-92% cheaper)

Maximum Quality

GPT-5.5 is OpenAI's most capable model. For applications requiring the absolute highest quality output, GPT-5.5 justifies its premium pricing.

Quality: GPT-5.5 | Budget: Grok 4.3

Output-Heavy Workloads

Grok 4.3 at $2.50/M output is 92% cheaper than GPT-5.5's $30.00/M. For content generation, code completion, or any high-output task, Grok saves dramatically.

Output-heavy: Grok 4.3 (92% cheaper output)

Premium vs Value

GPT-5.5 commands a premium for the highest quality. Grok 4.3 delivers 80%+ of the capability at 75-92% less cost. Choose based on your quality requirements.

Premium: GPT-5.5 | Value: Grok 4.3

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Frequently Asked Questions

Is Grok 4.3 cheaper than GPT-5.5?

Yes. Grok 4.3 costs $1.25/M input and $2.50/M output. GPT-5.5 costs $5.00/M input and $30.00/M output. Grok is 75% cheaper on input and 92% cheaper on output. For 1M input + 500K output/month, Grok costs $2.50 vs GPT-5.5's $20.00 — saving $17.50/month (88%).

Which has a larger context window?

GPT-5.5 has a 1.05M token context window, which is slightly larger than Grok 4.3's 1M context. The difference is minimal — both handle very long contexts.

When should I choose GPT-5.5 over Grok 4.3?

Choose GPT-5.5 when: (1) you need OpenAI's premium quality, (2) you want the broader ecosystem, (3) your workload requires the absolute highest reasoning. Choose Grok 4.3 when: (1) cost is critical (75-92% cheaper), (2) you want xAI's platform, (3) Grok's capabilities meet your needs.

Are both models production-ready?

Both support production workloads. GPT-5.5 is OpenAI's most capable premium model. Grok 4.3 from xAI offers competitive performance at 75-92% lower cost with a comparable 1M context.