Grok 4.3 vs GPT-5 — Pricing Comparison 2026

Requests per Day

Days per Month

xAI

Grok 4.3

$0.00

per month

Input cost

Output cost

Cost per request

Requests/month

OpenAI

GPT-5

$0.00

per month

Input cost

Output cost

Cost per request

Requests/month

Which Model for Which Use Case?

Chatbots & Customer Support

High-volume, output-heavy workloads where Grok's 75% cheaper output pricing delivers massive savings. A chatbot generating 500K output tokens/day saves $112.50/month with Grok.

Best value: Grok 4.3 (75% cheaper output)

Code Generation & Debugging

Both handle coding well. Grok 4.3's larger context (1M vs 272K) is better for analyzing entire codebases. GPT-5 may have slightly better tooling integration for some IDE plugins.

Large codebases: Grok 4.3 (3.7x context) | IDE integration: GPT-5

Long-Document Processing

Grok 4.3's 1M context window can process documents that GPT-5's 272K cannot fit. For legal documents, research papers, or large codebases, Grok handles it in a single request.

Best choice: Grok 4.3 (3.7x more context)

Real-Time Data & Analysis

Grok 4.3 has real-time access to X/Twitter data, making it ideal for sentiment analysis, trend monitoring, and social media analytics. GPT-5 relies on training data cutoffs.

Real-time data: Grok 4.3 | General analysis: GPT-5

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Frequently Asked Questions

Is Grok 4.3 cheaper than GPT-5?

Yes. Grok 4.3 costs $1.25/M input and $2.50/M output. GPT-5 costs $1.25/M input and $10/M output. Input pricing is identical, but Grok 4.3 is 75% cheaper on output tokens. For a typical workload of 1M input + 500K output tokens/month, Grok 4.3 costs $2.50 vs GPT-5's $6.25 — saving you $3.75/month (60%).

Which has a larger context window?

Grok 4.3 has a 1M token context window, while GPT-5 has 272K. Grok 4.3 offers 3.7x more context capacity, which is critical for processing very long documents, maintaining extended conversations, or handling large codebases in a single request.

Is Grok 4.3 as capable as GPT-5?

Grok 4.3 is competitive with GPT-5 on most tasks. xAI's model excels at reasoning and has real-time data access via X/Twitter. GPT-5 may have an edge on certain coding benchmarks and has broader third-party tooling support. For most production workloads, Grok 4.3 provides comparable quality at significantly lower cost.

Can I switch from GPT-5 to Grok 4.3 easily?

Yes. Both use standard REST APIs. If you're using an abstraction layer like LiteLLM or LangChain, switching is straightforward. xAI's API is OpenAI-compatible, so you can often just change the base URL and API key. The main difference is in available features and tooling integrations.