Model comparison
Gemini 2.5 Flash vs Gemini 2.5 Pro
Price history, scores and specs for both models, line by line. Every value shows where it came from and when we last confirmed it.
Gemini 2.5 Flash
Gemini 2.5 Flash is Google's state-of-the-art workhorse model, specifically designed for advanced reasoning, coding, mathematics, and scientific tasks.
Gemini 2.5 Pro
Gemini 2.5 Pro is Google’s state-of-the-art AI model designed for advanced reasoning, coding, mathematics, and scientific tasks.
Quick take
Where each one leads
- Gemini 2.5 Flash costs less to send text to: $0.300 per million tokens, against $1.25 per million tokens for Gemini 2.5 Pro.
- Gemini 2.5 Flash costs less per word it writes: $2.50 per million tokens, against $10.00 per million tokens for Gemini 2.5 Pro.
- Gemini 2.5 Pro scores higher on the Artificial Analysis Intelligence Index: 16.1 to 15.5.
- More people run Gemini 2.5 Flash through OpenRouter than Gemini 2.5 Pro right now.
Each line comes from a checked value in the tables below. Pick on your workload: price and usage matter for high volume, context and scores for long documents and agent loops.
Price history
Prices side by side, day by day
- Gemini 2.5 Flash
- Gemini 2.5 Pro
- Gemini 2.5 Flash
- Gemini 2.5 Pro
Prices are the listed OpenRouter base rates in US dollars. A day we could not confirm is left out of the line, never filled in.
Price
What each one costs now
| Measure | Gemini 2.5 Flash | Gemini 2.5 Pro |
|---|---|---|
| Input price | $0.300 per million tokens Leads | $1.25 per million tokens |
| Output price | $2.50 per million tokens Leads | $10.00 per million tokens |
Scores
Benchmarks, with source and date
| Measure | Gemini 2.5 Flash | Gemini 2.5 Pro |
|---|---|---|
| Artificial Analysis Intelligence Index | 15.5 | 16.1 Leads |
| Artificial Analysis Coding Index | Not checked yet | 33.3 |
| Artificial Analysis Agentic Index | Not checked yet | 1.6 |
| LMArena text rating (Elo) | 1,417 | 1,458 Leads |
| LMArena web development rating (Elo) | Not checked yet | 1,228 |
| LMArena vision rating (Elo) | 1,235 | 1,263 Leads |
| Design Arena rating (Elo) | 1,132 | 1,220 Leads |
Specs
Context, modalities and tool use
| Measure | Gemini 2.5 Flash | Gemini 2.5 Pro |
|---|---|---|
| Context window | 1,048,576 tokens | 1,048,576 tokens |
| Reads | Files, Images, Text, Audio, Video | Text, Images, Files, Audio, Video |
| Writes | Text | Text |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
| Open weights | No | No |
| Listed since | 17 June 2025 | 17 June 2025 |
Usage
How much each one is used
| Measure | Gemini 2.5 Flash | Gemini 2.5 Pro |
|---|---|---|
| Tokens served on OpenRouter in a day | 40.4B Leads (for 10 Nov 2026) | 4.3B (for 10 Nov 2026) |
| Requests on OpenRouter in a day | 14.3M Leads (for 10 Nov 2026) | 486.9K (for 10 Nov 2026) |
| Tool calls on OpenRouter in a day | 374.2K Leads (for 10 Nov 2026) | 10.2K (for 10 Nov 2026) |
| Token usage, last 7 days | Down 1% on the week before (for 10 Nov 2026) | Up 6% on the week before Leads (for 10 Nov 2026) |
- Gemini 2.5 Flash
- Gemini 2.5 Pro
How this works
One link, either order
This link stays the same whichever order you name the two models in, so you can share it as it is. A line appears only when at least one model has a value we confirmed from a source; values we have not confirmed are left out, never guessed. To add a third record of any type, use the open comparison. Read how we check facts.