Side by side pricing and context for Gemini 1.5 Flash and Gemini 2.5 Flash. Rates are curated catalog values with last verified dates on each model page.
Gemini 1.5 Flash
Older Gemini Flash baseline for volume traffic comparisons. Prefer 2.5/3 Flash for new products unless you must match a 1.5 deployment.
Input $0.075 / Output $0.300 per 1M
Context 1M · Approx (Gemini family)
Gemini 2.5 Flash
Low-latency Gemini for chat and high throughput. Often the cost/speed sweet spot on Google. Approx token counts in the browser.
Input $0.300 / Output $2.50 per 1M
Context 1M · Approx (Gemini family)
Quick take
- Gemini 1.5 Flash is cheaper on input in this catalog snapshot.
- Gemini 1.5 Flash is cheaper on output in this catalog snapshot.
- Both last verified on their model pages (2026-08-02 / 2026-08-02).
Rate table
| Metric | Gemini 1.5 Flash | Gemini 2.5 Flash |
|---|---|---|
| Input / 1M | $0.075 | $0.300 |
| Output / 1M | $0.300 | $2.50 |
| Cached input / 1M | $0.019 | $0.030 |
| Context | 1M | 1M |
| Tokenizer | Approx (Gemini family) | Approx (Gemini family) |