GPT-4.5 vs Qwen 3.8 27B
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: GPT-4.5 or Qwen 3.8 27B?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | GPT-4.5 | Qwen 3.8 27B | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $75.00 | $0.20 | Qwen 3.8 27B is 375.0x cheaper |
| Output Cost / 1M Tokens | $150.00 | $0.60 | Qwen 3.8 27B (99.6% lower) |
| Prompt Cache Read / 1M | $37.500 | $0.050 | Qwen 3.8 27B is 750.0x cheaper |
| Prompt Cache Write / 1M | $75.00 | $0.20 | Qwen 3.8 27B is 375.0x cheaper |
| Avg TTFT Response Latency | 850ms | 120ms | Qwen 3.8 27B (+730ms faster) |
| SWE-bench Verified (Coding) | 38% | 58.4% | Qwen 3.8 27B (+20.4% lead) |
| Inference Value Score (IVR) | 22.1 / 100 | 75.7 / 100 | Qwen 3.8 27B (+53.6 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
$0.20/1M in · $0.60/1M out
Prompt Cache: $0.050/1M read · $0.20/1M 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 Qwen 3.8 27B
Choose Qwen 3.8 27B when you need High-performance 27B open weights optimized for local deployment, code generation, and low-latency production pipelines. and prioritize Alibaba Cloud ecosystem integration at $0.20/1M tokens.
Related Questions & Decision Factors
Which is cheaper: GPT-4.5 or Qwen 3.8 27B?
Qwen 3.8 27B is cheaper at $0.20/1M input tokens compared to $75.00/1M for GPT-4.5.
Which model has lower latency: GPT-4.5 or Qwen 3.8 27B?
Qwen 3.8 27B delivers faster response times with an average TTFT of 120ms 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 Qwen 3.8 27B?
Choose Qwen 3.8 27B when you need High-performance 27B open weights optimized for local deployment, code generation, and low-latency production pipelines. and prioritize Alibaba Cloud ecosystem integration at $0.20/1M tokens.