Side-by-side comparison · models
Gemini 2.5 Flash vs Gemini 3 Flash Preview
What we have checked about each, line by line. Every value shows where it came from and when we last confirmed it.
Models
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.
Models
Gemini 3 Flash Preview
Gemini 3 Flash Preview is a high speed, high value thinking model designed for agentic workflows, multi turn chat, and coding assistance.
Checked facts
Line by line
| Measure | Gemini 2.5 Flash | Gemini 3 Flash Preview |
|---|---|---|
| Input price | $0.300 per million tokens | $0.500 per million tokens |
| Output price | $2.50 per million tokens | $3.00 per million tokens |
| Price on google-ai-studio | $0.015 per million cached input tokens | $0.025 per million cached input tokens |
| Price on google-ai-studio | $0.150 per million input tokens | $0.250 per million input tokens |
| Price on google-ai-studio | $1.25 per million output tokens | $1.50 per million output tokens |
| Price on google-vertex | Not checked yet | $0.025 per million cached input tokens |
| Price on google-vertex | Not checked yet | $0.250 per million input tokens |
| Price on google-vertex | Not checked yet | $1.50 per million output tokens |
| Latest version | google/gemini-2.5-flash | google/gemini-3-flash-preview-20251217 |
| Time to first token (ms) | 21,370 | 810 |
| Time to first token (ms) on google-ai-studio | 950 | 1,996 |
| Output speed (tokens a second) | 211.3 | 208.8 |
| Output speed (tokens a second) on google-ai-studio | 75 | 93 |
| Time to first token (ms) on google-vertex | Not checked yet | 13,935 |
| Output speed (tokens a second) on google-vertex | Not checked yet | 14 |
| Tokens served on OpenRouter in a day | 40.4B (for 10 Nov 2026) | 94.4B (for 10 Nov 2026) |
| Tool calls on OpenRouter in a day | 374.2K (for 10 Nov 2026) | 1.1M (for 10 Nov 2026) |
| Artificial Analysis Intelligence Index | 15.5 | 26.3 |
| LMArena text rating (Elo) | 1,417 | Not checked yet |
| LMArena vision rating (Elo) | 1,235 | Not checked yet |
| Design Arena rating (Elo) | 1,132 | 1,192 |
| Terminal bench | 17.1% (for 17 June 2025) | 64.3% (for 17 Dec 2025) |
| Balrog | 33.5% (for 17 June 2025) | 48.1% (for 17 Dec 2025) |
| Dtbench | 76.5% (for 17 June 2025) | 89.1% (for 17 Dec 2025) |
| Frontiermath 2025 02 28 private | 4.8% (for 17 June 2025) | 35.6% (for 17 Dec 2025) |
| Frontiermath tier 4 2025 07 01 private | 4.2% (for 17 June 2025) | 4.2% (for 17 Dec 2025) |
| Lmca | 27.5% (for 17 June 2025) | 43.1% (for 17 Dec 2025) |
| Simplebench | 41.2% (for 17 June 2025) | 61.1% (for 17 Dec 2025) |
| Gpqa diamond | Not checked yet | 89.4% (for 17 Dec 2025) |
| Swe bench verified | Not checked yet | 75.4% (for 17 Dec 2025) |
| Frontiermath tiers 1 3 v2 private | Not checked yet | 51.2% (for 17 Dec 2025) |
| Simpleqa verified | Not checked yet | 66.8% (for 17 Dec 2025) |
| Arc agi 2 | Not checked yet | 33.6% (for 17 Dec 2025) |
| Arc agi | Not checked yet | 84.7% (for 17 Dec 2025) |
| Chess puzzles | Not checked yet | 39% (for 17 Dec 2025) |
| Deepresearch bench | Not checked yet | 49.8% (for 17 Dec 2025) |
| Frontiermath tier 4 v2 private | Not checked yet | 17.1% (for 17 Dec 2025) |
| Geobench | Not checked yet | 88% (for 17 Dec 2025) |
| Gso bench | Not checked yet | 9.8% (for 17 Dec 2025) |
| Mystery game puzzles | Not checked yet | 26% (for 17 Dec 2025) |
| Proofbench | Not checked yet | 15% (for 17 Dec 2025) |
| Vpct | Not checked yet | 72.6% (for 17 Dec 2025) |
| Weirdml | Not checked yet | 61.6% (for 17 Dec 2025) |
| Otis mock aime 2024 2025 | Not checked yet | 95.6% (saturated benchmark: the top models all score near the ceiling) (for 17 Dec 2025) |
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