Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 4.5 vs Gemini 2.0 Flash
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Sonnet 4.5 wins on 7/7 benchmarks
Claude Sonnet 4.5 wins 7 of 7 shared benchmarks. Leads in reasoning · math · knowledge.
Category leads
reasoning·Claude Sonnet 4.5math·Claude Sonnet 4.5knowledge·Claude Sonnet 4.5coding·Claude Sonnet 4.5
Hype vs Reality
Attention vs performance
Claude Sonnet 4.5
#207 by perf·#10 by attention
Gemini 2.0 Flash
#140 by perf·no signal
Best value
Gemini 2.0 Flash
45.7x better value than Claude Sonnet 4.5
Claude Sonnet 4.5
4.2 pts/$
$9.00/M
Gemini 2.0 Flash
192.0 pts/$
$0.25/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Google DeepMind
$4.20T·Tier 1
Head to head
7 benchmarks · 2 models
Claude Sonnet 4.5Gemini 2.0 Flash
ARC-AGI-2
Claude Sonnet 4.5 leads by +12.3
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
Claude Sonnet 4.5
13.6
Gemini 2.0 Flash
1.3
FrontierMath-2025-02-28-Private
Claude Sonnet 4.5 leads by +13.5
FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning.
Claude Sonnet 4.5
15.2
Gemini 2.0 Flash
1.7
GPQA diamond
Claude Sonnet 4.5 leads by +24.2
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Sonnet 4.5
76.4
Gemini 2.0 Flash
52.2
MATH level 5
Claude Sonnet 4.5 leads by +15.6
MATH Level 5 · the hardest tier of the MATH benchmark, featuring competition-level problems from AMC, AIME, and Olympiad-style mathematics.
Claude Sonnet 4.5
97.7
Gemini 2.0 Flash
82.2
OTIS Mock AIME 2024-2025
Claude Sonnet 4.5 leads by +46.7
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Sonnet 4.5
77.8
Gemini 2.0 Flash
31.0
SimpleBench
Claude Sonnet 4.5 leads by +27.8
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Claude Sonnet 4.5
45.2
Gemini 2.0 Flash
17.3
WeirdML
Claude Sonnet 4.5 leads by +21.9
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Sonnet 4.5
47.7
Gemini 2.0 Flash
25.8
Full benchmark table
| Benchmark | Claude Sonnet 4.5 | Gemini 2.0 Flash |
|---|---|---|
ARC-AGI-2 ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data. | 13.6 | 1.3 |
FrontierMath-2025-02-28-Private FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning. | 15.2 | 1.7 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 76.4 | 52.2 |
MATH level 5 MATH Level 5 · the hardest tier of the MATH benchmark, featuring competition-level problems from AMC, AIME, and Olympiad-style mathematics. | 97.7 | 82.2 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 77.8 | 31.0 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 45.2 | 17.3 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 47.7 | 25.8 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $3.00 | $15.00 | 1.0M tokens (~500 books) | $60.00 | |
| $0.10 | $0.40 | 1.0M tokens (~500 books) | $1.75 |