DeepSeek V3 vs GPT-4.5
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: DeepSeek V3 or GPT-4.5?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | DeepSeek V3 | GPT-4.5 | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $0.14 | $75.00 | DeepSeek V3 is 535.7x cheaper |
| Output Cost / 1M Tokens | $0.28 | $150.00 | DeepSeek V3 (99.8% lower) |
| Prompt Cache Read / 1M | $0.014 | $37.500 | DeepSeek V3 is 2678.6x cheaper |
| Prompt Cache Write / 1M | $0.14 | $75.00 | DeepSeek V3 is 535.7x cheaper |
| Avg TTFT Response Latency | 410ms | 850ms | DeepSeek V3 (+440ms faster) |
| SWE-bench Verified (Coding) | 42% | 38% | DeepSeek V3 (+4.0% lead) |
| Inference Value Score (IVR) | 75.9 / 100 | 22.1 / 100 | DeepSeek V3 (+53.8 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
$0.14/1M in · $0.28/1M out
Prompt Cache: $0.014/1M read · $0.14/1M write
$75.00/1M in · $150.00/1M out
Prompt Cache: $37.500/1M read · $75.00/1M write
When to Choose DeepSeek V3
Choose DeepSeek V3 when you need Massive mixture-of-experts generalist model offering industry-leading price-to-performance efficiency for production chat and drafting. and have an infrastructure budget aligned with $0.14/1M tokens.
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 prioritize OpenAI ecosystem integration at $75.00/1M tokens.
Related Questions & Decision Factors
Which is cheaper: DeepSeek V3 or GPT-4.5?
DeepSeek V3 is cheaper at $0.14/1M input tokens compared to $75.00/1M for GPT-4.5.
Which model has lower latency: DeepSeek V3 or GPT-4.5?
DeepSeek V3 delivers faster response times with an average TTFT of 410ms vs 850ms for GPT-4.5.
When should you choose DeepSeek V3?
Choose DeepSeek V3 when you need Massive mixture-of-experts generalist model offering industry-leading price-to-performance efficiency for production chat and drafting. and have an infrastructure budget aligned with $0.14/1M tokens.
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 prioritize OpenAI ecosystem integration at $75.00/1M tokens.