Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 5.5 vs Gemini 4 Carbon
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Gemini 4 Carbon wins on 11/13 benchmarks
Gemini 4 Carbon wins 11 of 13 shared benchmarks. Leads in agentic · reasoning · knowledge.
Category leads
agentic·Gemini 4 Carbonreasoning·Gemini 4 Carbonknowledge·Gemini 4 Carbonmath·Gemini 4 Carboncoding·Claude Sonnet 5.5general·Gemini 4 Carbon
Hype vs Reality
Attention vs performance
Claude Sonnet 5.5
#18 by perf·#11 by attention
Gemini 4 Carbon
#1 by perf·#8 by attention
Best value
Gemini 4 Carbon
1.2x better value than Claude Sonnet 5.5
Claude Sonnet 5.5
11.9 pts/$
$6.00/M
Gemini 4 Carbon
14.3 pts/$
$6.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Google DeepMind
$3.61T·Tier 1
Head to head
13 benchmarks · 2 models
Claude Sonnet 5.5Gemini 4 Carbon
APEX-Agents
Gemini 4 Carbon leads by +8.7
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Sonnet 5.5
75.5
Gemini 4 Carbon
84.2
ARC-AGI
Gemini 4 Carbon leads by +2.0
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Claude Sonnet 5.5
96.5
Gemini 4 Carbon
98.5
ARC-AGI-2
Gemini 4 Carbon leads by +10.3
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 5.5
83.9
Gemini 4 Carbon
94.2
Chess Puzzles
Gemini 4 Carbon leads by +20.0
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Sonnet 5.5
56.9
Gemini 4 Carbon
76.8
FrontierMath-Tier-4-v2-Private
Gemini 4 Carbon leads by +14.6
Claude Sonnet 5.5
80.5
Gemini 4 Carbon
95.1
FrontierMath-Tiers-1-3-v2-Private
Gemini 4 Carbon leads by +1.9
Claude Sonnet 5.5
93.4
Gemini 4 Carbon
95.3
Frontierswe
Claude Sonnet 5.5 leads by +0.7
Claude Sonnet 5.5
61.9
Gemini 4 Carbon
61.2
Furniture Assembly
Gemini 4 Carbon leads by +3.6
Claude Sonnet 5.5
64.3
Gemini 4 Carbon
67.9
GPQA diamond
Gemini 4 Carbon leads by +1.3
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Sonnet 5.5
98.0
Gemini 4 Carbon
99.3
Mystery Game Puzzles
Gemini 4 Carbon leads by +8.8
Claude Sonnet 5.5
61.5
Gemini 4 Carbon
70.3
OTIS Mock AIME 2024-2025
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Sonnet 5.5
100.0
Gemini 4 Carbon
100.0
SimpleBench
Gemini 4 Carbon leads by +20.0
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Claude Sonnet 5.5
71.1
Gemini 4 Carbon
91.1
SimpleQA Verified
Gemini 4 Carbon leads by +31.2
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Sonnet 5.5
46.5
Gemini 4 Carbon
77.7
Full benchmark table
| Benchmark | Claude Sonnet 5.5 | Gemini 4 Carbon |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 75.5 | 84.2 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 96.5 | 98.5 |
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. | 83.9 | 94.2 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 56.9 | 76.8 |
FrontierMath-Tier-4-v2-Private | 80.5 | 95.1 |
FrontierMath-Tiers-1-3-v2-Private | 93.4 | 95.3 |
Frontierswe | 61.9 | 61.2 |
Furniture Assembly | 64.3 | 67.9 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 98.0 | 99.3 |
Mystery Game Puzzles | 61.5 | 70.3 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 100.0 | 100.0 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 71.1 | 91.1 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 46.5 | 77.7 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $2.00 | $10.00 | 1.0M tokens (~500 books) | $40.00 | |
| $2.00 | $10.00 | 1.0M tokens (~524 books) | $40.00 |