GPT-3.5 Turbo vs Gemini 2.5 Flash Native Audio Latest: cost comparison
Prices updated 2026-10-28 · computed from live provider data
Short answer: GPT-3.5 Turbo is cheaper on a
3:1 input/output blend — $0.750 per million tokens versus
$0.875, a 14% difference.
Gemini 2.5 Flash Native Audio Latest offers the larger context window at 131,072 tokens, against 16,385 for GPT-3.5 Turbo.
Head to head
| GPT-3.5 Turbo | Gemini 2.5 Flash Native Audio Latest | |
|---|---|---|
| Input, per 1M tokens | $0.500 | $0.500 |
| Output, per 1M tokens | $1.50 | $2.00 |
| Blended 3:1, per 1M | $0.750 | $0.875 |
| Context window | 16,385 | 131,072 |
| Vendor | vercel_ai_gateway | gemini |
Monthly cost at real volumes
| Workload (input / output) | GPT-3.5 Turbo | Gemini 2.5 Flash Native Audio Latest |
|---|---|---|
| 1M in / 250K out | $0.875 | $1.00 |
| 10M in / 2.5M out | $8.75 | $10.00 |
| 100M in / 25M out | $87.50 | $100 |
Which should you pick?
Pick Gemini 2.5 Flash Native Audio Latest when you need the longer context window (131,072 vs 16,385 tokens). Pick GPT-3.5 Turbo when price per token dominates your workload — high-volume classification, extraction, or batch summarisation.