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GPT-5 vs Grok 4
A detailed comparison of GPT-5 (OpenAI) and Grok 4 (xAI) across pricing, performance, and features.
Pricing Comparison
| Metric | GPT-5 | Grok 4 | Difference |
|---|---|---|---|
| Input / 1M tokens | $1.25 | $3.00 | +140% |
| Output / 1M tokens | $10.00 | $15.00 | +50% |
| Context window | 128K | 128K | — |
| Max output | 16.384K | 16.384K | — |
Benchmark Comparison
| Benchmark | GPT-5 | Grok 4 |
|---|---|---|
| MMLU-Pro | 88.5% | 86% |
| HumanEval | 95% | 93% |
| GPQA | 73.5% | 72% |
Capabilities
| Capability | GPT-5 | Grok 4 |
|---|---|---|
| audio | ✓ | ✗ |
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
| web-search | ✗ | ✓ |
GPT-5 Strengths
- ✓Strong all-around performance
- ✓Good price for flagship tier
- ✓Multimodal including audio
GPT-5 Weaknesses
- ✗128K context vs 200K+ for newer models
- ✗Codex variants better for pure coding
Grok 4 Strengths
- ✓Built-in web search and real-time data
- ✓Strong reasoning
- ✓$25 free credits for new users
Grok 4 Weaknesses
- ✗Premium pricing for its benchmark tier
- ✗Additional charges for tool invocations ($2.50-$5/1K calls)
- ✗Smaller ecosystem than OpenAI/Anthropic
Quick Verdict
Best value: GPT-5 is the more affordable option at $1.25/$10 per 1M tokens.
Higher benchmarks: GPT-5 scores higher on average across available benchmarks (85.7% avg).
Choose GPT-5 if cost matters most. Choose Grok 4 if you need the best possible quality for complex tasks.