Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 5.5 vs GPT-6 Sol
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Sonnet 5.5 wins on 8/12 benchmarks
Claude Sonnet 5.5 wins 8 of 12 shared benchmarks. Leads in agentic · knowledge · coding.
Category leads
agentic·Claude Sonnet 5.5knowledge·Claude Sonnet 5.5coding·Claude Sonnet 5.5math·GPT-6 Solgeneral·Claude Sonnet 5.5
Hype vs Reality
Attention vs performance
Claude Sonnet 5.5
#34 by perf·#12 by attention
GPT-6 Sol
#23 by perf·#4 by attention
Best value
GPT-6 Sol
1.0x better value than Claude Sonnet 5.5
Claude Sonnet 5.5
11.0 pts/$
$6.00/M
GPT-6 Sol
11.5 pts/$
$6.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
12 benchmarks · 2 models
Claude Sonnet 5.5GPT-6 Sol
APEX-Agents
Claude Sonnet 5.5 leads by +21.2
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-6 Sol
54.3
Chess Puzzles
Claude Sonnet 5.5 leads by +3.2
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
GPT-6 Sol
53.7
Frontiercode
Claude Sonnet 5.5 leads by +2.8
Claude Sonnet 5.5
52.1
GPT-6 Sol
49.3
FrontierMath-Tier-4-v2-Private
GPT-6 Sol leads by +9.5
Claude Sonnet 5.5
80.5
GPT-6 Sol
90.0
FrontierMath-Tiers-1-3-v2-Private
GPT-6 Sol leads by +1.0
Claude Sonnet 5.5
88.8
GPT-6 Sol
89.8
Furniture Assembly
Claude Sonnet 5.5 leads by +23.8
Claude Sonnet 5.5
64.3
GPT-6 Sol
40.5
GPQA diamond
Claude Sonnet 5.5 leads by +1.7
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-6 Sol
92.4
Mystery Game Puzzles
Claude Sonnet 5.5 leads by +9.9
Claude Sonnet 5.5
61.5
GPT-6 Sol
51.5
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-6 Sol
100.0
Proofbench
Claude Sonnet 5.5 leads by +17.0
Claude Sonnet 5.5
100.0
GPT-6 Sol
83.0
SimpleQA Verified
GPT-6 Sol leads by +14.2
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-6 Sol
60.7
SpireClimb
GPT-6 Sol leads by +6.2
Claude Sonnet 5.5
1.3
GPT-6 Sol
7.5
Full benchmark table
| Benchmark | Claude Sonnet 5.5 | GPT-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 | 54.3 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 56.9 | 53.7 |
Frontiercode | 52.1 | 49.3 |
FrontierMath-Tier-4-v2-Private | 80.5 | 90.0 |
FrontierMath-Tiers-1-3-v2-Private | 88.8 | 89.8 |
Furniture Assembly | 64.3 | 40.5 |
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 | 92.4 |
Mystery Game Puzzles | 61.5 | 51.5 |
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 | 60.7 |
SpireClimb | 1.3 | 7.5 |
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 |