Scale App (50K requests/day, 2K tokens avg)
At scale, GPT-5 mini offers 80% of GPT-5's quality at 80% lower cost. For most production workloads, that's the right tradeoff.
Competitor Alternatives Even Cheaper Than GPT-oss
If absolute lowest cost is your priority, models outside the GPT-5 family can beat even GPT-oss pricing:
| Model | Input ($/1M) | Output ($/1M) | vs GPT-oss 20B |
|---|---|---|---|
| Gemini 2.5 Flash-Lite | $0.075 | $0.30 | 6% cheaper input |
| Llama 3.1 8B | $0.10 | $0.10 | 25% cheaper output |
| DeepSeek V4 Flash | $0.14 | $0.28 | 20% cheaper output |
| Gemini 2.5 Flash-Lite | $0.10 | $0.40 | 13% cheaper input |
Gemini 2.5 Flash-Lite is the only API cheaper than GPT-oss 20B on input tokens — but GPT-oss models often produce better output quality for the same price.
The Bottom Line
For most use cases, GPT-5 mini ($0.25/$2.00) is the cheapest GPT-5 API worth using. It delivers 80%+ of GPT-5's quality at 80% lower cost. For truly budget-conscious high-volume workloads, GPT-oss 20B ($0.08) is hard to beat — and if you need even cheaper, Gemini Flash Lite edges it out on input cost.
The smart play: use GPT-5 mini as your default and reserve GPT-5 only for complex reasoning tasks. Use the APIpulse calculator to model your exact workload.
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