← All Models

Claude Sonnet 4.6 vs GPT-5.5

Claude Sonnet 4.6 leads in 5 of 8 categories

Arena ELO

Claude Sonnet 4.6

Cheaper

Claude Sonnet 4.6

Faster

Claude Sonnet 4.6

Detailed Comparison

CategoryClaude Sonnet 4.6GPT-5.5
ProviderAnthropic OpenAI
Context Window1M WIN128K
Input Price ($/1M)$3 WIN$5
Output Price ($/1M)$15 WIN$30
Arena ELO1440 WINN/A
Coding79.6% SWE-bench N/A
Reasoning72.5% OSWorld N/A
Speed (tokens/sec)~80 t/s WINN/A
Open SourceNo No

Frequently Asked Questions

Which is cheaper, Claude Sonnet 4.6 or GPT-5.5?

Claude Sonnet 4.6 is approximately 49% cheaper than GPT-5.5 per million tokens.

Which is better for coding, Claude Sonnet 4.6 or GPT-5.5?

Claude Sonnet 4.6 scores 79.6% SWE-bench on coding benchmarks, while GPT-5.5 scores N/A.

Which has a larger context window?

Claude Sonnet 4.6 supports 1M context, while GPT-5.5 supports 128K.

Is Claude Sonnet 4.6 or GPT-5.5 open source?

Claude Sonnet 4.6 is proprietary. GPT-5.5 is proprietary.

Related Articles

Anthropic extends Claude Fable access after GPT-5.6

Claude's J-space is not consciousness, but it matters

Claude Code MCP setup that connects real tools

Claude Reflect turns usage into retention

Claude Code’s backdoor scare points to 4 real risks

Anthropic’s Claude Skills define the new agent toolkit

More Comparisons

Claude Sonnet 4.6 vs Claude Opus 4.5Claude Sonnet 4.6 vs Llama 4 ScoutClaude Sonnet 4.6 vs Claude Haiku 4.5Claude Sonnet 4.6 vs Qwen 3.6Claude Sonnet 4.6 vs Claude Fable 5Claude Sonnet 4.6 vs Kimi K2.7 CodeClaude Sonnet 4.6 vs DeepSeek V4 FlashClaude Sonnet 4.6 vs GPT-5.6 LunaGPT-5.5 vs Claude Opus 4.5GPT-5.5 vs Llama 4 ScoutGPT-5.5 vs Claude Haiku 4.5GPT-5.5 vs Qwen 3.6GPT-5.5 vs Claude Fable 5GPT-5.5 vs Kimi K2.7 CodeGPT-5.5 vs DeepSeek V4 FlashGPT-5.5 vs GPT-5.6 Luna