GPT-4.5 vs Grok 3 Mini
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: GPT-4.5 or Grok 3 Mini?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | GPT-4.5 | Grok 3 Mini | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $75.00 | $0.30 | Grok 3 Mini is 250.0x cheaper |
| Output Cost / 1M Tokens | $150.00 | $1.20 | Grok 3 Mini (99.2% lower) |
| Prompt Cache Read / 1M | $37.500 | $0.080 | Grok 3 Mini is 468.8x cheaper |
| Prompt Cache Write / 1M | $75.00 | $0.30 | Grok 3 Mini is 250.0x cheaper |
| Avg TTFT Response Latency | 850ms | 150ms | Grok 3 Mini (+700ms faster) |
| SWE-bench Verified (Coding) | 38% | 54% | Grok 3 Mini (+16.0% lead) |
| Inference Value Score (IVR) | 22.1 / 100 | 69.6 / 100 | Grok 3 Mini (+47.5 pts) |
Interactive Monthly Token Economics & ROI Forecaster
Model your expected production workload across prompt (input) and completion (output) tokens with prompt caching economics.
Estimated Monthly Spend
$75.00/1M in · $150.00/1M out
Prompt Cache: $37.500/1M read · $75.00/1M write
$0.30/1M in · $1.20/1M out
Prompt Cache: $0.080/1M read · $0.30/1M write
When to Choose GPT-4.5
Choose GPT-4.5 when you need Deep world-knowledge synthesis, high-EQ conversational nuance, and long-form creative generation requiring massive pretraining breadth. and have an infrastructure budget aligned with $75.00/1M tokens.
When to Choose Grok 3 Mini
Choose Grok 3 Mini when you need High-speed reasoning model providing rapid answers and code generation with chain-of-thought capabilities at edge pricing. and prioritize xAI ecosystem integration at $0.30/1M tokens.
Related Questions & Decision Factors
Which is cheaper: GPT-4.5 or Grok 3 Mini?
Grok 3 Mini is cheaper at $0.30/1M input tokens compared to $75.00/1M for GPT-4.5.
Which model has lower latency: GPT-4.5 or Grok 3 Mini?
Grok 3 Mini delivers faster response times with an average TTFT of 150ms vs 850ms for GPT-4.5.
When should you choose GPT-4.5?
Choose GPT-4.5 when you need Deep world-knowledge synthesis, high-EQ conversational nuance, and long-form creative generation requiring massive pretraining breadth. and have an infrastructure budget aligned with $75.00/1M tokens.
When should you choose Grok 3 Mini?
Choose Grok 3 Mini when you need High-speed reasoning model providing rapid answers and code generation with chain-of-thought capabilities at edge pricing. and prioritize xAI ecosystem integration at $0.30/1M tokens.