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GPT-5.6 Sol vs Claude Opus 4.6

Updated Oct 25, 2026. Checked daily.

These are the current #1 and the alternative for Research & Web Search.

#1

GPT-5.6 Sol

OpenAI

Evidence
LMArena Search 1261.
Cost
Uses a ChatGPT plan. Check the plan page for the current price.
Access
Paid plan
Privacy
Yes on personal Free, Plus, and Pro. Improve the model for everyone is on by default. Settings, Data controls, turn off Improve the model for everyone.
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Alternative

Claude Opus 4.6

Anthropic

Evidence
LMArena Search 1251.
Cost
Uses a Claude plan. Check the plan page for the current price.
Access
Paid plan
Privacy
Anthropic says Free, Pro, and Max chats are used for training only if you allow it, and you choose at signup. The toggle has been reported as on by default, so check it. Settings, then Privacy. Turn off Help improve Claude.
Pick this if
Pick this when you already work in Claude.

Questions

Which is better for research & web search, GPT-5.6 Sol or Claude Opus 4.6?

GPT-5.6 Sol leads research & web search on LMArena Search. GPT-5.6 Sol scores 1261 and Claude Opus 4.6 scores 1251 on that signal.

Which is cheaper?

GPT-5.6 Sol costs Uses a ChatGPT plan. Check the plan page for the current price. Claude Opus 4.6 costs Uses a Claude plan. Check the plan page for the current price. These are the stored prices, not a guess about which plan is cheaper for you.

Which is more private?

GPT-5.6 Sol: Yes on personal Free, Plus, and Pro. Improve the model for everyone is on by default. Claude Opus 4.6: Anthropic says Free, Pro, and Max chats are used for training only if you allow it, and you choose at signup. The toggle has been reported as on by default, so check it.