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Anthropic: Claude Opus 5.5 vs OpenAI: GPT-6.1 Sol

Anthropic: Claude Opus 5.5 and OpenAI: GPT-6.1 Sol are both reasoning models. This page compares the specs we have. It does not declare a quality winner — Arena and Artificial Analysis keep those numbers.

Anthropic: Claude Opus 5.5 lessonOpenAI: GPT-6.1 Sol lessonTest side by side

Live specs

Anthropic: Claude Opus 5.5OpenAI: GPT-6.1 Sol
Typereasoningreasoning
Input$4 / M$2 / M
Output$20 / M$10 / M
Context1.0M1.1M
Inputstext, image, filefile, image, text
Toolsyesyes
Weightsunverifiedunverified

PickAnthropic: Claude Opus 5.5 if

  • its lab, license, or the explainer matches the job better

PickOpenAI: GPT-6.1 Sol if

  • input price matters. OpenAI: GPT-6.1 Sol lists $2 / M in
  • the input is long. OpenAI: GPT-6.1 Sol lists 1.1M context

Saved runs

No public playground runs include both models yet.