GPT-4.5 vs Qwen 3.8 Flash Next
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: GPT-4.5 or Qwen 3.8 Flash Next?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | GPT-4.5 | Qwen 3.8 Flash Next | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $75.00 | $0.10 | Qwen 3.8 Flash Next is 750.0x cheaper |
| Output Cost / 1M Tokens | $150.00 | $0.35 | Qwen 3.8 Flash Next (99.8% lower) |
| Prompt Cache Read / 1M | $37.500 | $0.020 | Qwen 3.8 Flash Next is 1875.0x cheaper |
| Prompt Cache Write / 1M | $75.00 | $0.10 | Qwen 3.8 Flash Next is 750.0x cheaper |
| Avg TTFT Response Latency | 850ms | 95ms | Qwen 3.8 Flash Next (+755ms faster) |
| SWE-bench Verified (Coding) | 38% | 61% | Qwen 3.8 Flash Next (+23.0% lead) |
| Inference Value Score (IVR) | 22.1 / 100 | 82.1 / 100 | Qwen 3.8 Flash Next (+60 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
$0.10/1M in · $0.35/1M out
Prompt Cache: $0.020/1M read · $0.10/1M 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 Flash Next
Choose Qwen 3.8 Flash Next when you need Ultra-high-throughput MoE with 1M context designed for high-concurrency API gateways, real-time summarization, and agent search. and prioritize Alibaba Cloud ecosystem integration at $0.10/1M tokens.
Related Questions & Decision Factors
Which is cheaper: GPT-4.5 or Qwen 3.8 Flash Next?
Qwen 3.8 Flash Next is cheaper at $0.10/1M input tokens compared to $75.00/1M for GPT-4.5.
Which model has lower latency: GPT-4.5 or Qwen 3.8 Flash Next?
Qwen 3.8 Flash Next delivers faster response times with an average TTFT of 95ms 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 Flash Next?
Choose Qwen 3.8 Flash Next when you need Ultra-high-throughput MoE with 1M context designed for high-concurrency API gateways, real-time summarization, and agent search. and prioritize Alibaba Cloud ecosystem integration at $0.10/1M tokens.