GPT-4.5 vs GPT-4o
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: GPT-4.5 or GPT-4o?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | GPT-4.5 | GPT-4o | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $75.00 | $2.50 | GPT-4o is 30.0x cheaper |
| Output Cost / 1M Tokens | $150.00 | $10.00 | GPT-4o (93.3% lower) |
| Prompt Cache Read / 1M | $37.500 | $1.250 | GPT-4o is 30.0x cheaper |
| Prompt Cache Write / 1M | $75.00 | $2.50 | GPT-4o is 30.0x cheaper |
| Avg TTFT Response Latency | 850ms | 280ms | GPT-4o (+570ms faster) |
| SWE-bench Verified (Coding) | 38% | 48% | GPT-4o (+10.0% lead) |
| Inference Value Score (IVR) | 22.1 / 100 | 49.3 / 100 | GPT-4o (+27.2 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
$2.50/1M in · $10.00/1M out
Prompt Cache: $1.250/1M read · $2.50/1M 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 GPT-4o
Choose GPT-4o when you need Flagship multimodal foundation model combining native text, vision, and audio processing for real-time enterprise AI. and prioritize OpenAI ecosystem integration at $2.50/1M tokens.
Related Questions & Decision Factors
Which is cheaper: GPT-4.5 or GPT-4o?
GPT-4o is cheaper at $2.50/1M input tokens compared to $75.00/1M for GPT-4.5.
Which model has lower latency: GPT-4.5 or GPT-4o?
GPT-4o delivers faster response times with an average TTFT of 280ms 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 GPT-4o?
Choose GPT-4o when you need Flagship multimodal foundation model combining native text, vision, and audio processing for real-time enterprise AI. and prioritize OpenAI ecosystem integration at $2.50/1M tokens.