Grok 4 vs GPT-5.2
xAI's flagship takes on OpenAI's workhorse. Both score Elo 1390 — so which one should you actually use?
GPT-5.2 wins on price — nearly half the input cost and slightly cheaper output — while matching Grok 4's quality benchmarks. Grok 4 offers a larger 256K context window and is the strongest option in the xAI ecosystem. If cost matters, GPT-5.2 is the clear pick. If you're already in xAI's stack or need the extra context, Grok 4 holds its own.
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Grok 4
xAI
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GPT-5.2
OpenAI
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|---|---|---|
| Input Price | $2.00/1M | $1.75/1M |
| Output Price | $10.00/1M | $14.00/1M |
| Blended Price | $6.00/1M | $7.88/1M |
| LMSYS Elo | 1395 | 1390 |
| Context Window | 1,000,000 | 400,000 |
| Reasoning | Excellent | Strong |
| Code Generation | Strong | Excellent |
| Provider | xAI | OpenAI |
Monthly cost estimate
Adjust the sliders to see how costs compare for your workload.
Pricing breakdown
Grok 4 is priced at $2.00 per million input tokens and $10.00 per million output tokens, giving a blended rate of $6.00/1M. GPT-5.2 has slightly cheaper input at $1.75/1M but significantly more expensive output at $14.00/1M, yielding a blended cost of $7.88/1M. Grok 4 delivers a 24% lower blended cost, making it the more economical choice for most workloads.
Quality & benchmarks
On the LMSYS Chatbot Arena leaderboard, Grok 4 scores 1395 Elo versus GPT-5.2's 1390 — a slight edge for xAI's flagship. Grok 4 is known for strong reasoning capabilities and real-time information access via xAI's data partnerships. GPT-5.2 maintains an edge in code generation and structured output, with broader third-party tool integration.
Context window comparison
Grok 4 offers a 1,000,000-token context window — 2.5x larger than GPT-5.2's 400,000-token limit. For tasks requiring large document ingestion, multi-file code review, or lengthy conversation history, Grok 4 has a decisive advantage. GPT-5.2's 400K window handles most applications comfortably, but power users may hit the ceiling.