Is Claude or Gemini better?

In our October 2026 round, Claude Fable 5.1 ranked first on 8 of 10 prompts in a blind review on the strength of deeper, better-documented answers. Gemini 3.1 Pro Preview won the brief-tight email and the rounding fix. Both finished every task with zero hallucinations.

Is Claude or Gemini better for coding?

Split. Claude wrote the best-documented slugify and passed everything; Gemini produced the only cent-rounding fix that stays correct on boundary cases. Claude explains its code better; Gemini's fixes are more literally correct.

Which is cheaper, Claude or Gemini?

Almost identical: $0.42 for Claude Fable 5.1 against $0.39 for Gemini 3.1 Pro Preview across all ten prompts, measured in Krater. Both had one slow extended-thinking run on the hardest coding task.

Which is faster, Claude or Gemini?

Effectively tied: median answer times were 13.4s for Claude and 14.5s for Gemini across the ten prompts. Both spent about 100 seconds thinking through the rounding bug, far longer than the other models in the round.

Can I use Claude and Gemini in the same place?

Yes. Krater gives you Claude Fable 5.1, Gemini 3.1 Pro Preview and 400+ other models in one workspace, and the Model Arena sends one prompt to several models side by side, which is how this comparison was run.

How was this comparison tested?

All five models (GPT-6 Astra, Claude Fable 5.1, Gemini 3.1 Pro Preview, Grok 4.3 and Perplexity Sonar Pro) received the same ten prompts side by side in the Krater Model Arena on 7 October 2026, with default settings and no system prompt; this page compares the two you are looking at. We recorded time to a complete answer and the real model cost per answer, ran the generated code through its own test suites, fact checked every claim, scored completion as pass, partial or fail, and then ranked the answers blind. The full procedure is on our methodology page.

Will this comparison be updated?

Yes. Flagship comparisons are rerun monthly and whenever a provider ships a new version. The tested month and model versions are shown at the top of the page.

Claude vs Gemini: 10 tasks tested side by side (October 2026)

Tested: October 2026 with Claude Fable 5.1 and Gemini 3.1 Pro Preview, by Vitus Pruser.

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