Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 5.5 vs GPT-5.6 Sol
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Sonnet 5.5 wins on 8/11 benchmarks
Claude Sonnet 5.5 wins 8 of 11 shared benchmarks. Leads in agentic · coding · general.
Category leads
agentic·Claude Sonnet 5.5coding·Claude Sonnet 5.5math·GPT-5.6 Solgeneral·Claude Sonnet 5.5knowledge·Claude Sonnet 5.5
Hype vs Reality
Attention vs performance
Claude Sonnet 5.5
#11 by perf·#10 by attention
GPT-5.6 Sol
#30 by perf·#4 by attention
Best value
Claude Sonnet 5.5
1.1x better value than GPT-5.6 Sol
Claude Sonnet 5.5
12.5 pts/$
$6.00/M
GPT-5.6 Sol
11.1 pts/$
$6.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
11 benchmarks · 2 models
Claude Sonnet 5.5GPT-5.6 Sol
APEX-Agents
Claude Sonnet 5.5 leads by +24.1
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
GPT-5.6 Sol
51.4
Frontiercode
Claude Sonnet 5.5 leads by +4.6
Claude Sonnet 5.5
52.1
GPT-5.6 Sol
47.5
FrontierMath-Tier-4-v2-Private
GPT-5.6 Sol leads by +2.4
Claude Sonnet 5.5
80.5
GPT-5.6 Sol
82.9
FrontierMath-Tiers-1-3-v2-Private
GPT-5.6 Sol leads by +0.4
Claude Sonnet 5.5
88.8
GPT-5.6 Sol
89.1
Frontierswe
Claude Sonnet 5.5 leads by +29.7
Claude Sonnet 5.5
61.9
GPT-5.6 Sol
32.2
Furniture Assembly
Claude Sonnet 5.5 leads by +26.2
Claude Sonnet 5.5
64.3
GPT-5.6 Sol
38.1
GPQA diamond
Claude Sonnet 5.5 leads by +2.8
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
94.1
GPT-5.6 Sol
91.3
Mystery Game Puzzles
Claude Sonnet 5.5 leads by +7.7
Claude Sonnet 5.5
61.5
GPT-5.6 Sol
53.7
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
GPT-5.6 Sol
100.0
Proofbench
Claude Sonnet 5.5 leads by +17.0
Claude Sonnet 5.5
100.0
GPT-5.6 Sol
83.0
SimpleQA Verified
GPT-5.6 Sol leads by +23.2
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
GPT-5.6 Sol
69.7
Full benchmark table
| Benchmark | Claude Sonnet 5.5 | GPT-5.6 Sol |
|---|---|---|
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 | 51.4 |
Frontiercode | 52.1 | 47.5 |
FrontierMath-Tier-4-v2-Private | 80.5 | 82.9 |
FrontierMath-Tiers-1-3-v2-Private | 88.8 | 89.1 |
Frontierswe | 61.9 | 32.2 |
Furniture Assembly | 64.3 | 38.1 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 94.1 | 91.3 |
Mystery Game Puzzles | 61.5 | 53.7 |
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 |
Proofbench | 100.0 | 83.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 46.5 | 69.7 |
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 | 1.1M tokens (~525 books) | $40.00 |
People also compared