Updated for Week 39, 2026

GPT-6 Sol vs Gemini 3.1 Pro

On our Week 39, 2026 scores, GPT-6 Sol edges ahead (92 vs 87). But GPT-6 Sol is about 1.2x cheaper on output tokens than Gemini 3.1 Pro. That makes GPT-6 Sol the clear pick for most people. Pick GPT-6 Sol for daily work in ChatGPT. Pick Gemini 3.1 Pro for google Workspace users.

GPT-6 SolGemini 3.1 Pro
MakerOpenAIGoogle
ReleasedSeptember 22, 2026—
Price / 1M tokens$2 in / $10 out$2 in / $12 out
Open weightsNoNo
Power Rankings rank#4 (92)#7 (87)
Coding rank#4 (90)—
Best Value rank#3 (91)—
Best for
  • Daily work in ChatGPT
  • Coding in Codex
  • Balanced cost vs. quality
  • Google Workspace users
  • Long documents
  • Multimodal input
Strengths
  • Half the price of GPT-5.6 Sol's promo rates
  • Fewer factual mistakes
  • Available in ChatGPT, Codex, the API and GitHub
  • Top-15 on the LMArena text leaderboard
  • Competitive mid-tier pricing
Watch out for
  • Less reasoning headroom than Astra
  • Brand-new; independent testing still coming in
  • Still in preview
  • Gemini 3.8 Flash scores higher on the Arena for less money

The short version

GPT-6 Sol: OpenAI's everyday workhorse. Sol brings Astra-style improvements to a much cheaper tier, and OpenAI says it makes about half as many mistakes as GPT-5.6 Sol.

Gemini 3.1 Pro: Google's Pro-tier model, still labelled a preview. It's a solid all-rounder, but it's starting to look dated next to Google's own fast-moving Flash line.

Rankings change every week. Check the latest standings or swap in a different model.