OpenAI GPT-4o vs Grok 3
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: OpenAI GPT-4o or Grok 3?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | OpenAI GPT-4o | Grok 3 | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $2.50 | $3.00 | OpenAI GPT-4o is 1.2x cheaper |
| Output Cost / 1M Tokens | $10.00 | $15.00 | OpenAI GPT-4o (33.3% lower) |
| Avg TTFT Response Latency | 280ms | 850ms | OpenAI GPT-4o (+570ms faster) |
| SWE-bench Verified (Coding) | 38.8% | 58.5% | Grok 3 (+19.7% lead) |
| Inference Value Score (IVR) | 45.5 / 100 | 45.9 / 100 | Grok 3 (+0.4 pts) |
Interactive Monthly Token Economics & ROI Forecaster
Model your expected production workload across prompt (input) and completion (output) tokens.
Estimated Monthly Spend
$2.5/1M in · $10/1M out
$3/1M in · $15/1M out
When to Choose OpenAI GPT-4o
Choose OpenAI GPT-4o when you need General multimodal assistant applications, consumer chat interfaces, and enterprise knowledge workers. and have an infrastructure budget aligned with $2.50/1M tokens.
When to Choose Grok 3
Choose Grok 3 when you need Frontier scientific reasoning, real-time web exploration, and advanced mathematical problem solving. and prioritize xAI ecosystem integration at $3.00/1M tokens.
Related Questions & Decision Factors
Which is cheaper: OpenAI GPT-4o or Grok 3?
OpenAI GPT-4o is cheaper at $2.50/1M input tokens compared to $3.00/1M for Grok 3.
Which model has lower latency: OpenAI GPT-4o or Grok 3?
OpenAI GPT-4o delivers faster response times with an average TTFT of 280ms vs 850ms for Grok 3.
When should you choose OpenAI GPT-4o?
Choose OpenAI GPT-4o when you need General multimodal assistant applications, consumer chat interfaces, and enterprise knowledge workers. and have an infrastructure budget aligned with $2.50/1M tokens.
When should you choose Grok 3?
Choose Grok 3 when you need Frontier scientific reasoning, real-time web exploration, and advanced mathematical problem solving. and prioritize xAI ecosystem integration at $3.00/1M tokens.