Claude Sonnet 4.5 vs Gemini 1.5 Flash 8B
Wins 3 of 3 areas
Coding · Reasoning · Images and charts
Wins 0 of 3 areas
—
Claude Sonnet 4.5 is the stronger all-rounder.
Scores updated · 10 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 Claude Sonnet 4.5 pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+47.5points ahead
- Harder college exam questions with imagesMMMU-Pro+32.2points ahead
- College exam questions with charts, maps and diagramsMMMU+25.9points 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 10 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningClaude Sonnet 4.5
- GPQA DiamondClaude Sonnet 4.5 by 47.583.435.9+47.5
- Humanity's Last ExamClaude Sonnet 4.5 by 13.117.84.7+13.1
Images and chartsClaude Sonnet 4.5
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.
- MMLU-ProClaude Sonnet 4.5 by 28.887.558.7+28.8
- AA IntelligenceClaude Sonnet 4.5 by 14.520.76.2+14.5
- XSTestClaude Sonnet 4.5 by 3.896.492.6+3.8
- MRCRtie55.454.7tie
Questions people ask
Which is better, Claude Sonnet 4.5 or Gemini 1.5 Flash 8B?
Claude Sonnet 4.5 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?
Claude Sonnet 4.5. It wins the one coding test both models report.
How do you compare the two?
We use the 10 benchmark tests both models have published scores on. The verdict counts the 6 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.