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Face-off

Claude Sonnet 5.5 vs GPT-5.5

Claude Sonnet 5.5 versus GPT-5.5 on list price and published Arena rating. Claude Sonnet 5.5 Arena 1473 · GPT-5.5 Arena 1471 Blended list price Claude Sonnet 5.5 $8.00 and GPT-5.5 $23.75 per 1M tokens.

Claude Sonnet 5.5AnthropicArena 1473$8.00 / 1M
Claude Sonnet 5.5 leads by 1 Arena pointsGPT-5.5 costs 3.0x more
GPT-5.5OpenAIArena 1471$23.75 / 1M

Claude Sonnet 5.5

Anthropic

Input / 1M$2.00Output / 1M$10.00Arena1473Value1241,000 coding edits$12.00

Open model

GPT-5.5

OpenAI

Input / 1M$5.00Output / 1M$30.00Arena1471Value1001,000 coding edits$34.00

Open model

Claude Sonnet 5.5 leads by 1 Arena points. GPT-5.5 costs 3.0x more, moving from Claude Sonnet 5.5 to GPT-5.5. The 1,000-edit cost uses a planning assumption of 2,000 input and 800 output tokens, not a measured trace. Share this face-off. The link renders an Open Graph image of the two models.