Grok 4.3 vs GPT-5
Same input price, 75% cheaper output. Grok 4.3 delivers premium performance at mid-tier prices with 3.7x more context.
Pricing data verified: Jun 8, 2026
| Specification | Grok 4.3 (xAI) | GPT-5 (OpenAI) |
|---|---|---|
| Input Price (per 1M tokens) | $1.25 | $1.25 |
| Output Price (per 1M tokens) | $2.50 | $10.00 |
| Context Window | 1M tokens | 272K tokens |
| Tier | Mid | Premium |
| Provider | xAI | OpenAI |
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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.
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.
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.
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.
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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.