Gemini 1.5 Flash 8B vs Gemini 2.5 Pro
Wins 0 of 3 areas
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Wins 3 of 3 areas
Coding · Reasoning · Images and charts
Gemini 2.5 Pro is the stronger all-rounder.
Scores updated · 11 tests both models report · How we compare
Where each one wins
Tests won in each of the three areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
Coding rests on a single test.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Gemini 2.5 Pro pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+47.7points ahead
- Harder college exam questions with imagesMMMU-Pro+38.4points ahead
- Math problems shown in pictures and chartsMathVista+29.2points ahead
Where Gemini 1.5 Flash 8B pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 11 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningGemini 2.5 Pro
- GPQA DiamondGemini 2.5 Pro by 47.735.983.6+47.7
- Humanity's Last ExamGemini 2.5 Pro by 13.34.718+13.3
Images and chartsGemini 2.5 Pro
Other results4 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- MRCRGemini 2.5 Pro by 38.354.793+38.3
- MMLU-ProGemini 2.5 Pro by 27.358.786+27.3
- AA IntelligenceGemini 2.5 Pro by 8.86.215+8.8
- XSTestGemini 2.5 Pro by 6.192.698.7+6.1
Questions people ask
Which is better, Gemini 1.5 Flash 8B or Gemini 2.5 Pro?
Gemini 2.5 Pro wins all three areas where both have results: coding, reasoning and images and charts. Gemini 1.5 Flash 8B wins none.
Which is better for coding?
Gemini 2.5 Pro. It wins the one coding test both models report.
How do you compare the two?
We use the 11 benchmark tests both models have published scores on. The verdict counts the 7 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 4 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.