Claude Sonnet 4 vs Gemini 2.0 Flash (Reasoning)
Wins 2 of 3 areas
Coding · Reasoning
Wins 0 of 3 areas
—
Claude Sonnet 4 is the stronger all-rounder.
Scores updated · 14 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 pulls ahead
- Fixes real GitHub issues in Python projectsSWE-bench Verified+59.2points ahead
- Common-sense trick questionsSimpleBench+14.8points ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+3.5points ahead
Where Gemini 2.0 Flash (Reasoning) pulls ahead
- College exam questions with charts, maps and diagramsMMMU+1points ahead
Every test, side by side
All 14 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningClaude Sonnet 4
- SimpleBenchClaude Sonnet 4 by 14.845.530.7+14.8
- GPQA DiamondClaude Sonnet 4 by 3.577.774.2+3.5
Images and chartsEven
- LMArena · VisionClaude Sonnet 4 by 33 rating points11911158+33 rating
- MMMUGemini 2.0 Flash (Reasoning) by 174.475.4+1
Other results9 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.
- AIME 2025Claude Sonnet 4 by 4370.527.5+43
- LiveCodeBenchClaude Sonnet 4 by 33.468.535.1+33.4
- HarmBenchClaude Sonnet 4 by 31.89866.2+31.8
- AIR-Bench 2024Claude Sonnet 4 by 22.188.366.2+22.1
- MMLU-ProClaude Sonnet 4 by 7.383.776.4+7.3
- simple_safety_testsClaude Sonnet 4 by 1.510098.5+1.5
- XSTestClaude Sonnet 4 by 1.396.695.3+1.3
- bbqClaude Sonnet 4 by 1.296.695.4+1.2
- anthropic_red_teamtie99.299.4tie
Questions people ask
Which is better, Claude Sonnet 4 or Gemini 2.0 Flash (Reasoning)?
Claude Sonnet 4 wins two of the three areas where both have results: coding and reasoning. Gemini 2.0 Flash (Reasoning) wins none. They are level on images and charts.
Which is better for coding?
Claude Sonnet 4. It wins the one coding test both models report.
How do you compare the two?
We use the 14 benchmark tests both models have published scores on. The verdict counts the 5 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 9 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.