Claude Sonnet 5.5 vs chatgpt-image-latest

Anthropic Claude Claude Sonnet 5.5OpenAI chatgpt-image-latest
VendorAnthropic ClaudeOpenAI
Context window1,000,000—
Max output128,000—
ReasoningYesNo
Tool callingYesNo
File inputYesYes
Inputtext, image, filetext, image
Outputtextimage
Released2026-09-282025-12-16