Claude Sonnet 5 vs GPT-6 Sol
How does Claude Sonnet 5 (Anthropic) compare against GPT-6 Sol (OpenAI)? Side-by-side scores, capability ratings and pricing, plus a clear verdict.
🏆 Quick verdict
Claude Sonnet 5 comes out ahead with an AIVerso score of 95 vs 93 and an aggregate capability rating of 612 vs 627 across 7 categories. GPT-6 Sol still leads on Programming, Knowledge, Long Context and Agent Capability.
Overall winner
Claude Sonnet 5
by Anthropic
Score: 95/100
Price$2/$10 per 1M (intro)
Context window1M
Free tierYes
API accessYes
Open sourceNo
Headline factsMost agentic Sonnet yet · frontier performance at $2/$10 per 1M tokens
🔗 Try Claude Sonnet 5 →
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GPT-6 Sol
by OpenAI
Score: 93/100
Price$2/$10 per 1M tokens
Context window1M
Free tierNo
API accessYes
Open sourceNo
Headline factsOpenAI's mid-tier GPT-6 · 50% cheaper than the GPT-5.6 series · Coding Agent Index 57 · 1M context
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📊 Capability ratings
AIVerso capability ratings (0–100) per category — an editorial summary informed by public benchmark results. Higher is better.
Category
Claude Sonnet 5
GPT-6 Sol
Math & Logice.g. AIME, MATH-500
91
91
Programminge.g. SWE-bench, LiveCodeBench
82
87
Reasoninge.g. GPQA, ARC
90
90
Knowledgee.g. MMLU-Pro
88
89
Long Contexte.g. MRCR, needle tests
90
93
Instruction Followinge.g. IFEval
92
91
Agent Capabilitye.g. Terminal-Bench, tool use
79
86
Why Claude Sonnet 5
Higher overall score (95 vs 93)
Has a free tier
Leads on Instruction Following (92 vs 91)
Most agentic Sonnet yet
frontier performance at $2/$10 per 1M tokens
Why GPT-6 Sol
Leads on Programming (87 vs 82)
Leads on Knowledge (89 vs 88)
Leads on Long Context (93 vs 90)
Leads on Agent Capability (86 vs 79)
OpenAI's mid-tier GPT-6
50% cheaper than the GPT-5.6 series
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❓ Frequently Asked Questions
Which is better: Claude Sonnet 5 or GPT-6 Sol?
Claude Sonnet 5 has the higher AIVerso score (95 vs 93). The better choice still depends on your use case — GPT-6 Sol leads on Programming and Knowledge.
How much does Claude Sonnet 5 cost compared to GPT-6 Sol?
Claude Sonnet 5: $2/$10 per 1M (intro). GPT-6 Sol: $2/$10 per 1M tokens. Only Claude Sonnet 5 has a free tier.
What context window does each support?
Claude Sonnet 5: 1M tokens. GPT-6 Sol: 1M tokens. The context window determines how much text, code or chat history a model can process at once.
Are Claude Sonnet 5 and GPT-6 Sol open source?
Claude Sonnet 5 is a closed, proprietary model. GPT-6 Sol is a closed, proprietary model.
How we compare: Scores and capability ratings are based on public benchmarks and provider documentation — not on commission rates. Last updated: September 29, 2026.