Claude Sonnet 5 vs gpt-5-mini

Anthropic Claude Claude Sonnet 5OpenAI gpt-5-mini
VendorAnthropic ClaudeOpenAI
Context window1,000,000400,000
Max output128,000128,000
ReasoningYesYes
Tool callingYesYes
File inputYesYes
Inputtext, image, filetext, image
Outputtexttext
Released2026-06-302025-08-07