Gemini 3.1 Flash Live vs GPT-5.4 Nano: streaming vs ultra-low-cost utility
GPT-5.4 Nano is far cheaper across the board. Gemini 3.1 Flash Live is preferred when you need ultra-low-latency real-time bidirectional streaming pipelines.
Low-latency streaming models compared.
Streaming applications require immediate responses. Gemini 3.1 Flash Live and GPT-5.4 Nano both offer lightweight, rapid completions with minimal pricing footprints.
By TechCompare · Updated
Cost Comparison
Based on 100,000 input tokens (50% cached), 5,000 output tokens, and 100 requests.
Side-by-side specs
| Spec | Gemini 3.1 Flash Live | GPT-5.4 Nano |
|---|---|---|
| Input Cost (per M) | $0.75 | $0.20 (better on this spec) |
| Output Cost (per M) | $4.50 | $1.25 (better on this spec) |
| Cached Input (per M) | $0.75 | $0.02 (better on this spec) |
| Batch Discount | 0% | 50% (better on this spec) |
How they differ
Gemini 3.1 Flash Live costs $0.75 per million input tokens and $4.50 per million output tokens. GPT-5.4 Nano is priced significantly lower at $0.20 per million input tokens and $1.25 per million output tokens, supporting a 90% caching discount.
Verdict
Nano wins every row: 3.75x cheaper on input ($0.20/M against $0.75) and 3.6x cheaper on output ($1.25/M against $4.50). Cache and batch widen the gap further: Nano's cached input is $0.02/M against Flash Live's $0.75/M (no caching), and Nano's 50% batch discount stands alone against Flash Live's 0%. Reach for Flash Live only when its bidirectional real-time streaming latency is the actual product requirement, not a nice-to-have.
Which should you pick?
Choose Gemini 3.1 Flash Live
Real-time bidirectional audio/video streaming, instant feedback loops.
Choose GPT-5.4 Nano
Low-cost background tasks, text classification, and basic chat utilities.