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Claude 3.5 Sonnet vs GPT-5.5

Claude 3.5 SonnetGPT-5.5
ProviderAnthropicOpenAI
Context Window200,000400,000
Release Date2024-06-20
Input Price$3.00/ 1M tokens$5.00/ 1M tokens
Output Price$15.00/ 1M tokens$30.00/ 1M tokens
Best forcoding · writing · chatbot · analysiscoding · professional work · complex reasoning · agents

Capabilities

Claude 3.5 SonnetGPT-5.5
Vision
Reasoning
Coding
Audio
Tools
Long Context

Ranking Comparison

Claude 3.5 SonnetGPT-5.5
Overall47.147.1
Benchmark00
Capability85.785.7
Price Efficiency100100
Context100100

Overall = Benchmark 50% + Capability 20% + Price Efficiency 20% + Context 10%.

Benchmark Comparison

Claude 3.5 SonnetGPT-5.5
Coding
Reasoning
Math
Vision

Price History

Claude 3.5 Sonnet

DateInputOutput
2026-08-05$3.00$15.00

/ 1M tokens

GPT-5.5

DateInputOutput
2026-08-05$5.00$30.00

/ 1M tokens

Claude 3.5 Sonnet

Anthropic's flagship model known for strong coding and nuanced writing.

GPT-5.5

OpenAI's most advanced model for coding and professional work, with a 400K context window.